Network Working Group D. Royer Internet-Draft INET-Consulting Expires: May 4, 2003 G. Babics Oracle P. Hill Massachusetts Institute of Technology S. Mansour AOL/Netscape November 3, 2002 Calendar Access Protocol (CAP) draft-ietf-calsch-cap-09.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http:// www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on May 4, 2003. Copyright Notice Copyright (C) The Internet Society (2002). All Rights Reserved. Abstract The Calendar Access Protocol (CAP) is an Internet protocol described in this memo that permits a Calendar User (CU) to utilize a Calendar User Agent (CUA) to access an [iCAL] based Calendar Store (CS). The CAP definition is based on requirements identified by the Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 1] Internet-Draft Calendar Access Protocol (CAP) November 2002 Internet Engineering Task Force (IETF) Calendaring and Scheduling (CALSCH) Working Group. More information about the IETF CALSCH Working Group activities can be found on the IMC web site at http:// www.imc.org/ietf-calendar and at the IETF web site at http:// www.ietf.org/html.charters/calsch-charter.html [1]. Refer to the references within this memo for further information on how to access these various documents. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Formatting Conventions . . . . . . . . . . . . . . . . . 5 1.2 Related Documents . . . . . . . . . . . . . . . . . . . 6 1.3 Definitions . . . . . . . . . . . . . . . . . . . . . . 7 2. Additions to iCalendar . . . . . . . . . . . . . . . . . 12 2.1 New Value Types (summary) . . . . . . . . . . . . . . . 13 2.1.1 New Parameters (summary) . . . . . . . . . . . . . . . . 14 2.1.2 New Properties (summary) . . . . . . . . . . . . . . . . 15 2.1.3 New Components (summary) . . . . . . . . . . . . . . . . 17 2.2 Relationship of RFC-2446 (ITIP) and CAP . . . . . . . . 18 3. CAP Design . . . . . . . . . . . . . . . . . . . . . . . 20 3.1 System Model . . . . . . . . . . . . . . . . . . . . . . 20 3.2 Calendar Store Object Model . . . . . . . . . . . . . . 20 3.3 Protocol Model . . . . . . . . . . . . . . . . . . . . . 21 3.3.1 Use of BEEP, MIME and iCalendar . . . . . . . . . . . . 22 4. Security Model . . . . . . . . . . . . . . . . . . . . . 24 4.1 Calendar User and UPNs . . . . . . . . . . . . . . . . . 24 4.1.1 UPNs and Certificates . . . . . . . . . . . . . . . . . 24 4.1.2 Anonymous Users and Authentication . . . . . . . . . . . 25 4.1.3 User Groups . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Access Rights . . . . . . . . . . . . . . . . . . . . . 26 4.2.1 Access Control and NOCONFLICT . . . . . . . . . . . . . 26 4.2.2 Calendar Access Right (VCAR) . . . . . . . . . . . . . . 26 4.2.3 Predefined VCARs . . . . . . . . . . . . . . . . . . . . 27 4.2.4 Decreed VCARs . . . . . . . . . . . . . . . . . . . . . 28 4.3 CAP Session Identity . . . . . . . . . . . . . . . . . . 29 5. CAP URL and Calendar Address . . . . . . . . . . . . . . 31 6. New Value Types . . . . . . . . . . . . . . . . . . . . 33 6.1 Property Value Data Types . . . . . . . . . . . . . . . 33 6.1.1 CAL-QUERY Value Type . . . . . . . . . . . . . . . . . . 33 6.1.1.1 [NOT] CAL-OWNERS() . . . . . . . . . . . . . . . . . . . 38 6.1.1.2 CURRENT-TARGET() . . . . . . . . . . . . . . . . . . . . 39 6.1.1.3 PARAM() . . . . . . . . . . . . . . . . . . . . . . . . 39 6.1.1.4 SELF() . . . . . . . . . . . . . . . . . . . . . . . . . 39 6.1.1.5 STATE() . . . . . . . . . . . . . . . . . . . . . . . . 40 6.1.1.6 Ordering of Results . . . . . . . . . . . . . . . . . . 40 6.1.1.7 Date sorting order . . . . . . . . . . . . . . . . . . . 40 6.1.1.8 Use of single quote . . . . . . . . . . . . . . . . . . 41 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 2] Internet-Draft Calendar Access Protocol (CAP) November 2002 6.1.1.9 Comparing DATE and DATE-TIME values . . . . . . . . . . 41 6.1.1.10 DTEND and DURATION . . . . . . . . . . . . . . . . . . . 42 6.1.1.11 [NOT] LIKE . . . . . . . . . . . . . . . . . . . . . . . 44 6.1.1.12 Empty vs. NULL . . . . . . . . . . . . . . . . . . . . . 45 6.1.1.13 [NOT] IN . . . . . . . . . . . . . . . . . . . . . . . . 45 6.1.1.14 DATE-TIME and TIME values in a WHEN clause . . . . . . . 46 6.1.1.15 Multiple contained components . . . . . . . . . . . . . 47 6.1.1.16 Example, Query by UID . . . . . . . . . . . . . . . . . 47 6.1.1.17 Query by Date-Time range . . . . . . . . . . . . . . . . 48 6.1.1.18 Query for all Unprocessed Entries . . . . . . . . . . . 48 6.1.1.19 Query with Subset of Properties by Date/Time . . . . . . 49 6.1.1.20 Query with Components and Alarms In A Range . . . . . . 49 6.1.2 UPN Value Type . . . . . . . . . . . . . . . . . . . . . 50 6.1.3 UPN-FILTER Value . . . . . . . . . . . . . . . . . . . . 51 7. New Parameters . . . . . . . . . . . . . . . . . . . . . 53 7.1 ENABLE Parameter . . . . . . . . . . . . . . . . . . . . 53 7.2 LOCAL Parameter . . . . . . . . . . . . . . . . . . . . 53 8. New Properties . . . . . . . . . . . . . . . . . . . . . 55 8.1 ALLOW-CONFLICT Property . . . . . . . . . . . . . . . . 55 8.2 ATT-COUNTER Property . . . . . . . . . . . . . . . . . . 55 8.3 CALID Property . . . . . . . . . . . . . . . . . . . . . 56 8.4 CALMASTER Property . . . . . . . . . . . . . . . . . . . 57 8.5 CARID Property . . . . . . . . . . . . . . . . . . . . . 57 8.6 CSID Property . . . . . . . . . . . . . . . . . . . . . 58 8.7 DECREED Property . . . . . . . . . . . . . . . . . . . . 59 8.8 DEFAULT-CHARSET Property . . . . . . . . . . . . . . . . 59 8.9 DEFAULT-LOCALE Property . . . . . . . . . . . . . . . . 60 8.10 DEFAULT-TZID Property . . . . . . . . . . . . . . . . . 61 8.11 DEFAULT-VCARS Property . . . . . . . . . . . . . . . . . 62 8.12 DENY Property . . . . . . . . . . . . . . . . . . . . . 63 8.13 EXPAND property . . . . . . . . . . . . . . . . . . . . 63 8.14 GRANT Property . . . . . . . . . . . . . . . . . . . . . 64 8.15 MAXDATE Property . . . . . . . . . . . . . . . . . . . . 65 8.16 MINDATE Property . . . . . . . . . . . . . . . . . . . . 65 8.17 MULTIPART Property . . . . . . . . . . . . . . . . . . . 66 8.18 NAME Property . . . . . . . . . . . . . . . . . . . . . 67 8.19 OWNER Property . . . . . . . . . . . . . . . . . . . . . 68 8.20 PERMISSION Property . . . . . . . . . . . . . . . . . . 69 8.21 QUERY property . . . . . . . . . . . . . . . . . . . . . 69 8.22 QUERYID property . . . . . . . . . . . . . . . . . . . . 70 8.23 REQUEST-STATUS property . . . . . . . . . . . . . . . . 71 8.24 RESTRICTION Property . . . . . . . . . . . . . . . . . . 72 8.25 SCOPE Property . . . . . . . . . . . . . . . . . . . . . 73 8.26 TARGET Property . . . . . . . . . . . . . . . . . . . . 73 8.27 TRANSP Property . . . . . . . . . . . . . . . . . . . . 74 9. New Components . . . . . . . . . . . . . . . . . . . . . 76 9.1 VAGENDA Component . . . . . . . . . . . . . . . . . . . 76 9.2 VCALSTORE Component . . . . . . . . . . . . . . . . . . 78 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 3] Internet-Draft Calendar Access Protocol (CAP) November 2002 9.3 VCAR Component . . . . . . . . . . . . . . . . . . . . . 81 9.4 VRIGHT Component . . . . . . . . . . . . . . . . . . . . 84 9.5 VREPLY Component . . . . . . . . . . . . . . . . . . . . 85 9.6 VQUERY Component . . . . . . . . . . . . . . . . . . . . 85 10. Commands and Responses . . . . . . . . . . . . . . . . . 87 10.1 CAP Commands (CMD) . . . . . . . . . . . . . . . . . . . 87 10.1.1 Bounded Latency . . . . . . . . . . . . . . . . . . . . 88 10.1.2 ABORT Command . . . . . . . . . . . . . . . . . . . . . 91 10.1.3 CONTINUE Command . . . . . . . . . . . . . . . . . . . . 92 10.1.4 CREATE Command . . . . . . . . . . . . . . . . . . . . . 93 10.1.5 DELETE Command . . . . . . . . . . . . . . . . . . . . . 99 10.2 GENERATE-UID Command . . . . . . . . . . . . . . . . . . 102 10.3 GET-CAPABILITY Command . . . . . . . . . . . . . . . . . 104 10.4 IDENTIFY Command . . . . . . . . . . . . . . . . . . . . 108 10.5 MODIFY Command . . . . . . . . . . . . . . . . . . . . . 111 10.6 MOVE Command . . . . . . . . . . . . . . . . . . . . . . 115 10.7 REPLY Response to a Command . . . . . . . . . . . . . . 118 10.8 SEARCH Command . . . . . . . . . . . . . . . . . . . . . 119 10.9 SET-LOCALE Command . . . . . . . . . . . . . . . . . . . 122 10.10 TIMEOUT Command . . . . . . . . . . . . . . . . . . . . 124 10.11 Response Codes . . . . . . . . . . . . . . . . . . . . . 125 11. Object Registration . . . . . . . . . . . . . . . . . . 128 11.1 Registration of New and Modified Entities . . . . . . . 128 11.2 Post the item definition . . . . . . . . . . . . . . . . 128 11.3 Allow a comment period . . . . . . . . . . . . . . . . . 128 11.4 Release a new RFC . . . . . . . . . . . . . . . . . . . 128 12. BEEP and CAP . . . . . . . . . . . . . . . . . . . . . . 129 12.1 BEEP Profile Registration . . . . . . . . . . . . . . . 129 12.2 BEEP Exchange Styles . . . . . . . . . . . . . . . . . . 129 13. IANA Considerations . . . . . . . . . . . . . . . . . . 130 14. Security Considerations . . . . . . . . . . . . . . . . 131 Authors' Addresses . . . . . . . . . . . . . . . . . . . 132 A. Acknowledgments . . . . . . . . . . . . . . . . . . . . 134 B. Bibliography . . . . . . . . . . . . . . . . . . . . . . 135 Full Copyright Statement . . . . . . . . . . . . . . . . 137 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 4] Internet-Draft Calendar Access Protocol (CAP) November 2002 1. Introduction This document specifies how a Calendar CUA interacts with a CS to manage calendar information. In particular, it specifies how to query, create, modify, and delete iCalendar components (e.g., events, to-dos, or daily journal entries). It further specifies how to search for available busy time information. Synchronization with CUAs is not covered. CAP is specified as a BEEP "profile". As such, many aspects of the protocol (e.g., authentication and privacy) are provided within [BEEP]. The protocol data units leverage the standard iCalendar format [iCAL] to convey calendar related information. CAP can also be used to store and fetch [iTIP] objects and when those objects are used in this memo, they mean exactly the same as defined in [iTIP]. When iCalendar objects are transfered between the CUA and a CS, some additional properties and parameters may be added and the CUA is responsible for correctly generating iCalendar objects to non CAP processes. The definition of new components, properties, parameter's, and value types are broken into two parts. The first part summarizes and defined the new objects. The second part provides the detail and any ABNF for those objects. 1.1 Formatting Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY" and "OPTIONAL" in this document are to be interpreted as described in [RFCWORDS]. Calendaring and scheduling roles are referred to in quoted-strings of text with the first character of each word in upper case. For example, "Organizer" refers to a role of a "Calendar User" (CU) within the protocol defined by [iTIP]. Calendar components defined by [iCAL] are referred to with capitalized, quoted-strings of text. All iCalendar components should start with the letter "V". For example, "VEVENT" refers to the event calendar component, "VTODO" refers to the to-do component and "VJOURNAL" refers to the daily journal component. Scheduling methods defined by [iTIP], are referred to with capitalized, quoted-strings of text. For example, "REPLY" refers to the method for replying to a "REQUEST". CAP commands are referred to by upper-case, quoted-strings of text, followed by the word "command". For example, "CREATE" command refers Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 5] Internet-Draft Calendar Access Protocol (CAP) November 2002 to the command for creating a calendar entry, "SEARCH" command refers to the command for reading calendar components. CAP Commands are named using the "CMD" property. Properties defined by this memo are referred to with capitalized, quoted-strings of text, followed by the word "property". For example, "ATTENDEE" property refers to the iCalendar property used to convey the calendar address that has been invited to a "VEVENT" or "VTODO" component. Property parameters defined by this memo are referred to with capitalized, quoted-strings of text, followed by the word "parameter". For example, "PARTSTAT" parameter refers to the iCalendar property parameter used to specify the participation status of an attendee. Enumerated values defined by this memo are referred to with capitalized text, either alone or followed by the word "value". Object states defined by this memo are referred to with capitalized, quoted-strings of text, followed by the word "state". For example, "BOOKED" state refers to an object in the booked state. Within a query, the different parts are referred to as a "clause" and its value as "clause value" and the clause name will be in uppercase enclosed in quotes. Example, The "SELECT" clause or if the "SELECT" clause value contains ... In tables, the quoted-string text is specified without quotes in order to minimize the table length. 1.2 Related Documents Implementers will need to be familiar with several other memos that, along with this one, describe the Internet calendaring and scheduling standards. These documents are: [iCAL] - (RFC2445) Which specifies the objects, data types, properties and property parameters used in the protocols, along with the methods for representing and encoding them. [iTIP] - (RFC2446) Which specifies an interoperability protocol for scheduling between different installations. [iMIP] - (RFC2447) Which specifies the Internet email binding for [iTIP]. [GUIDE] - (RFC3283), a guide to implementers and describes the elements of a calendaring system, how they interact with each Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 6] Internet-Draft Calendar Access Protocol (CAP) November 2002 other, how they interact with end users, and how the standards and protocols are used. This memo does not attempt to repeat the specification of concepts and definitions from these other memos. Where possible, references are made to the memo that provides for the specification of these concepts and definitions. 1.3 Definitions BOOKED - An obect in the calendar store has one of three conceptual states. It is "UNPROCESSED" state, "BOOKED" state or marked as "DELETED" state. How the implementation stores the state of any object is not a protocol issues and is not discussed. An object can be said to be booked, unprocessed, or marked for delete. 1. An "UNPROCESSED" state scheduling object has been stored in the calendar store but has not been acted on by a CU or CUA. All scheduled entries are [iTIP] objects. All [iTIP] objects in the store are not in the "BOOKED" state. To retrieve any [iTIP] object, simply do a query asking for any objects that were stored in the "UNPROCESSED" state. 2. A "BOOKED" state entry is stored with the "CREATE" command. It is an object that has been acted on by a CU or CUA and there has been a decision to store an object. To retrieve any booked object, simply do a query asking for any objects that were stored in the "BOOKED" state. 3. A "DELETED" state entry is created by sending a "DELETE" command with the "OPTION" parameter value set to "MARK". To retrieve any deleted object, simply do a query asking for any objects that were stored in the "DELETED" state. By default objects marked for delete are not returned. The CUA must specifically ask for marked for delete objects. You can not ask for components in the "DELETED" state and in other states in the same "VQUERY" component, as there would be no way to distinguish between them in the reply. Calendar - A collection of logically related objects or entities each of which may be associated with a calendar date and possibly time of day. These entities can include calendar properties or components. In addition, a calendar might be related to other calendars with the "RELATED-TO" property. A calendar is identified by its unique calendar identifier. The [iCAL] defines the initial calendar properties, calendar components and Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 7] Internet-Draft Calendar Access Protocol (CAP) November 2002 properties that make up the contents of a calendar. Calendar Access Protocol (CAP) - The standard Internet protocol that permits a CUA to access and manipulate calendars residing on a Calendar Store. (this memo) Calendar Access Rights (VCAR) - The mechanism for specifying the CAP operations ("PERMISSION") that a particular calendar user ("UPN") is granted or denied permission to perform on a given calendar object ("SCOPE"). The calendar access rights are specified with a "VCAR" component. Calendar Address - Also See Calendar URL - they are one in the same for CAP addresses. The calendar address can also be the value to the "ATTENDEE" and "ORGANIZER" properties as defined in [iCAL]. Calendar URL - A calendar URL is a URL defined in this memo that specifies the address of a CS or Calendar. Component- Any object that conforms to the iCalendar object format and that is either defined in an internet draft, registered with IANA, or is an experimental object that is prefixed with "x-". Some types of components include calendars, events, to-dos, journals, alarms, and time zones. A component consists of properties and possibly other contained components. For example, an event may contain an alarm component. Container - This is a generic name for VCALSTORE or VAGENDA. Properties - An attribute of a particular component. Some properties are applicable to different types of components. For example, the "DTSTART" property is applicable to the "VEVENT", "VTODO", and "VJOURNAL" components. Other components are applicable only to an individual type of calendar component. For example, the "TZURL" property may only be applicable to the "VTIMEZONE" components. Calendar Identifier (CalID) - A globally unique identifier associated with a calendar. Calendars reside within a CS. See Qualified Calendar Identifier and Relative Calendar Identifier. All CalIDs start with "cap:". Calendar Policy - A CAP operational restriction on the access or manipulation of a calendar. These may be outside of the scope of the CAP protocol. An example of an implementation or site policy is, "events MUST BE scheduled in unit intervals of one hour". Calendar Property - An attribute of a calendar ("VAGENDA"). The Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 8] Internet-Draft Calendar Access Protocol (CAP) November 2002 attribute applies to the calendar, as a whole. For example, the "CALSCALE" property specifies the calendar scale (e.g., the "GREGORIAN" value) for the all entries within the calendar. Calendar Store (CS) - The data and service model definition for a Calendar Store as defined in this memo. This memo does not specify how the CS is implemented. Calendar Server - An implementation of a Calendar Store (CS) that manages one or more calendars. Calendar Store Identifier (CSID) - The globally unique identifier for an individual CS. A CSID consists of the host and port portions of a "Common Internet Scheme Syntax" part of a URL, as defined by [URL]. The CSID excludes any reference to a specific calendar. Calendar Store Components - Components maintained in a CS specify a grouping of calendar store-wide information. Calendar Store Properties - Properties maintained in a Calendar Store calendar store-wide information. Calendar User (CU) - An entity (often biological) that uses a calendaring system. Calendar User Agent (CUA) - The client application that a CU utilizes to access and manipulate a calendar. CAP Session - An open communication channel between a CUA and a Calendar Server. If the CAP session is authenticated, the CU is "authenticated" and it is an "authenticated CAP session". Contained Component / Contained Properties - A component or property that is contained inside of another component. A "VALARM" component for example may be contained inside of a "VEVENT" component. And a "TRIGGER" property could be a contained property of a "VALARM" component. Delegate - A CU (sometimes called the delegatee) who has been assigned participation in a scheduled component (e.g., VEVENT) by one of the attendees in the scheduled component (sometimes called the delegator). An example of a delegate is a team member told to go to a particular meeting in place of another Attendee who is unable to attend. Designate - A CU who is authorized to act on behalf of another CU. An example of a designate is an assistant. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 9] Internet-Draft Calendar Access Protocol (CAP) November 2002 Experiential - The CUA and CS may implement experimental extensions to the protocol. They also might have experimental components, properties, and parameters. These extensions MUST start with "x-" (or "X-") and should include a vendor prefix (such as "x-myvendor- "). There is no guarantee that these experimental extensions will interoperate with other implementations. There is no guarantee that they will not interact in unpredictable ways with other vendor experimental extensions. Implementations should limit sending those extensions to other implementations. Object - A generic name for any component, property, parameter, or value type to be used in iCalendar. Overlapped Booking - A policy which indicates whether or not components with a "TRANSP" property not set to "TRANSPARENT- NOCONFLICT" or "OPAQUE-NOCONFLICT" value can overlap one another. When the policy is applied to a calendar it indicates whether or not the time span of any component (VEVENT, VTODO, ...) in the calendar can overlap the time span of any other component in the same calendar. When applied to an individual object, it indicates whether or not any other component's time span can overlap that individual component. If the CS does not allow overlapped booking, then the CS is unwilling to allow any overlapped bookings within any calendar in the CS. Owner - One or more CUs or UGs that are listed in the "OWNER" property in a calendar. There can be more than one owner. The " Qualified Calendar Identifier (Qualified CalID) - A CalID in which both the scheme and csid of the CAP URI are present. Realm - A collection of calendar user accounts, identified by a string. The name of the Realm is only used in UPNs. In order to avoid namespace conflict, the Realm SHOULD be postfixed with an appropriate DNS domain name. (e.g., the foobar Realm could be called foobar.example.com). Relative Calendar Identifier (Relative CalID) - An identifier for an individual calendar in a calendar store. It MUST BE unique within a calendar store. A Relative CalID consists of the "URL path" of the "Common Internet Scheme Syntax" portion of a URL, as defined by [URI] and [URLGUIDE]. Session Identity - A UPN associated with a CAP session. A session gains an identity after successful authentication. The identity is used in combination with VCAR to determine access to data in the CS. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 10] Internet-Draft Calendar Access Protocol (CAP) November 2002 User Group (UG) - A collection of Calendar Users and/or User Groups. These groups are expanded by the CS and may reside either locally or in an external database or directory. The group membership may be fixed or dynamic over time. Username - A name which denotes a Calendar User within a Realm. This is part of a UPN. User Principal Name (UPN) - A unique identifier that denotes a CU or a group of CU. A UPN is a RFC 822 compliant email address, with exceptions listed below, and in most cases it is deliverable to the CU. In some cases it is identical to the CU's well known email address. A CU's UPN MUST never be an e-mail address that is deliverable to a different person as there is no requirement that a person's UPN MUST BE their e-mail address. A UPN is formatted as a user name followed by "@" followed by a Realm in the form of a valid, and unique, DNS domain name. The user name MUST BE unique within the Realm. In it's simplest form it looks like "user@example.com". In certain cases a UPN will not be RFC 822 compliant. When anonymous authentication is used, or anonymous authorization is being defined, the special UPN "@" will be used. When authentication MUST BE used, but unique identity MUST BE obscured, a UPN of the form @DNS-domain-name may be used. For example, "@example.com". Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 11] Internet-Draft Calendar Access Protocol (CAP) November 2002 2. Additions to iCalendar Several new components, properties, parameters, and value types are added in CAP. This section summarizes those new objects. This memo extends the properties that can go into 'calprops' as defined in [iCAL] section 4.6 page 51 to allow [iTIP] objects transmitted between a CAP aware CUA and the CS to contain the "TARGET" and "CMD" properties. This memo does not address how a CUA transmits [iTIP] or [iMIP] objects to non CAP programs. calprops = 2*( ; 'prodid' and 'version' are both REQUIRED, ; but MUST NOT occur more than once. ; prodid /version / ; These are optional, but MUST NOT occur ; more than once. ; calscale / method / cmd / ; These are optional, and may occur more ; than once. ; target / iana-prop / x-prop Another change is that the 'component' part of the 'icalbody' ABNF as described in [iCAL] section 4.6 is optional when sending a command as shown in the following updated ABNF: icalbody = calprops component ; If the "VCALENDAR" component contains the "CMD" ; component then the 'component' is optional: ; / calprops ; Which MUST include a "CMD" property In addition a problem exists with the control of "VALARM" components and their "TRIGGER" properties. A CU may wish to set their own alarm Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 12] Internet-Draft Calendar Access Protocol (CAP) November 2002 (local alarms) on components. These local alarms are not to be forwarded to other CUs, CUAs, or CSs as are the "SEQUENCE" property and the "ENABLE" parameter. So for the protocol between a CUA and a CS, the following changes apply to the CAP protocol from [iCAL] section "4.6.6" page 67: alarmc = "BEGIN" ":" "VALARM" CRLF alarm-seq iana-prop (audioprop / dispprop / emailprop / procprop) "END" ":" "VALARM" CRLF alarm-seq = "SEQUENCE" alarmseqparam ":" integer CRLF alarmseqparam = *( ";" xparam) / ";" local-param The CUA adds a "SEQUENCE" property to each "VALARM" component as it books the component. This property along with the "LOCAL" and "ENABLE" parameters allow the CUA to uniquely identify any VALARM in any component. The CUA should remove those before forwarding to non CAP aware CUAs (including [iMIP] CUAs). In addition, if a CUA wished to ignore a "TRIGGER" property in a "VALARM" component that was supplied to it by the "Organizer", the CUA needs a common way to tag that trigger as disabled. So for the protocol between a CUA and a CS, the following is a modification to [iCAL] section "4.8.6.3" page 127: trigger = "TRIGGER" 1*(";" enable-param) (trigrel / trigabs) Section 7.1 and Section 7.2. These additions will be transmitted between a CS and a CAP aware CUA. So the "VERSION" value will remain at "2.0" as no existing [iTIP] or [iMIP] implementation will be effected. 2.1 New Value Types (summary) UPN The UPN value type is text value type restricted to only UPN values. (Section 6.1.2) UPN-FILTER Like the UPN value type, but also includes filter rules that allow wildcards. (Section 6.1.3) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 13] Internet-Draft Calendar Access Protocol (CAP) November 2002 CALQUERY The "CAL-QUERY" (Section 6.1.1) value type is a query syntax that is used by the CUA to specify the rules that apply to a CAP command. In the case of "SEARCH" command the query language is used to fetch objects from the CS. When used with the "DELETED" command, the selected objects are deleted from the CS. "CAL- QUERY" value type can also be used with "MOVE" and "MODIFY" commands. 2.1.1 New Parameters (summary) ENABLE - The "ENABLE" parameter in CAP is used to tag a "TRIGGER" property in a component as disabled or enabled. This is used when a scheduling request arrives and the CU wishes to ignore the trigger time included. (Section 7.1). Formal Definition: The "ENABLE" parameter is defined by the following notation: enable-param = "ENABLE" "=" ("TRUE" / "FALSE") LOCAL - The "LOCAL" parameter in CAP is used to tag a "SEQUENCE" property in a "VALARM" component to signify that a VALARM is local or to be distributed. (Section 7.2). For example, when inviting others to an event, the "Organizer's" booked "VEVENT" component might contain "VALARM" components, and those "VALARM" component might be 'alarm be 5 minutes before the meeting'. However other "Attendees" may have to set their own "VALARM" components for the same event (assuming they reply that they will be attending). So, by tagging the "VALARM" component as local the CUA MUST never forward those local "VALARM" components to other CS's or CUAs. The CUA can not simply delete any "VALARM components where the CU is not the "Organizer". If it did, any [iTIP] "COUNTER" method would result in the "Organizer" thinking that the "Attendee" wished to also counter with removing those "VALARM" components. And in addition, any update to an existing component would re- create those "VALARM" components in the "Attendees" CS. Formal Definition: The "LOCAL" parameter is defined by the Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 14] Internet-Draft Calendar Access Protocol (CAP) November 2002 following notation: local-param = "LOCAL" "=" ("TRUE" / "FALSE") 2.1.2 New Properties (summary) ALLOW-CONFLICT - Some entries in a calendar might not be valid if other entries were allowed to overlap the same time span. Renting a car for example. It would not make sense to allow two reservations for the same car at the same time. The "ALLOW- CONFLICT" property takes a boolean value. If FALSE, then conflicts are not allowed. (Section 8.1) ATT-COUNTER - When storing a "METHOD" property with the "COUNTER" method, there needs to be a way to remember who sent the COUNTER. The ATT-COUNTER property MUST BE added to all "COUNTER" [iTIP] components by the CUA before storing in a CS. (Section 8.2) CSID - Each CS needs its own unique identifier. The "CSID" property is the official unique identifier for the CS. If the BEEP 'serverName' attribute was supplied in the BEEP 'start' message, then the CSID will be mapped to the virtual host name supplied and the host name part of the CSID MUST BE the same as the 'serverName' value. This allows one CS implementation to service multiple virtual hosts. CS's are not required to support virtual hosting. If a CS does not support virtual hosting then it must ignore the BEEP 'serverName' attribute. (Section 8.6) CALID - Each calendar within a CS needs to be uniquely identifiable. The "CALID" property identifies a unique calendar within a CS. It can be a full CALID or a relative CALID. (Section 8.3) CALMASTER - The "CALMASTER" property specifies the contact information for the CS. (Section 8.4) CARID - Access rights can be saved and fetched by unique ID - the "CARID" property. (Section 8.5) CMD - The CAP commands, as well as replies are transmitted using the "CMD" property. (Section 10.1) DECREED - Some access rights are not changeable by the CUA. When that is the case, the "DECREED" property value in the "VCAR" component will be TRUE. (Section 8.7) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 15] Internet-Draft Calendar Access Protocol (CAP) November 2002 DEFAULT-CHARSET - The list of charsets supported by the CS. The first entry MUST BE the default for the CS. (Section 8.8) DEFAULT-LOCALE - The list of locales supported by the CS. The first entry in the list is the default locale. (Section 8.9) DEFAULT-TZID - This is the list of known timezones supported. The first entry is the default. (Section 8.10) DEFAULT-VCARS - A list of the "CARID" properties that will be used to create new calendars. (Section 8.11) DENY - The UPNs listed in the "DENY" property of a "VCAR" component will denied access as described in the "VRIGHT" component. (Section 8.12) EXPAND - This property tells the CS if the query reply should expand components into multiple instances. The default is FALSE. (Section 8.13) GRANT - The UPNs listed in the "GRANT" property of a "VCAR" component will allowed access as described in the "VRIGHT" component. (Section 8.14) MAXDATE - The maximum date supported by the CS. (Section 8.15) MINDATE - The minimum date supported by the CS. (Section 8.16) MULTIPART - Passed in the capability messages to indicate which MIME multipart types the sender supports. (Section 8.17) NAME - Several storeable components such as "VCAR" and "VQUERY" may have the "NAME" property contained in them to describe in various locals the purpose of the component. Components may have multiple "NAME" properties each with a unique "LANGUAGE" parameter. (Section 8.18) OWNER - Each calendar has at least one "OWNER" property. (xref target="OWNER"/>) Related to the "CAL-OWNERS()" (Section 6.1.1.1) query clause. PERMISSION - This property specifies the permission being granted or denied. Examples are the "SEARCH" and "MODIFY" values. (Section 8.20) QUERY - Used to hold the CAL-QUERY (Section 8.21) for the component. QUERYID - A unique id for a stored query. (Section 8.22) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 16] Internet-Draft Calendar Access Protocol (CAP) November 2002 REQUEST-STATUS - The [iCAL] "REQUEST-STATUS" property is extended to include new error numbers. (Section 8.23) RESTRICTION - In the final check when granting calendar access requests, the CS test the results to the value of the "RESTRICTION" property in the corresponding "VRIGHT" component to determine if the access meets that restriction. (Section 8.24) SCOPE - The "SCOPE" property is used in "VRIGHT"s component to select the subset of data that may be acted upon when checking access rights. (Section 8.25) TARGET - The new "VCALENDAR" component property "TARGET" (Section 8.26) is used to specify which calendar(s) will be the subject of the CAP command. TRANSP - This is a modification the [iCAL] "TRANSP" property and it allows more values. The new values are related to conflict control. (Section 8.27) 2.1.3 New Components (summary) VAGENDA - CAP allows the fetching and storing of the entire contents of a calendar. The "VCALENDAR" component is not sufficient to encapsulate all of the needed data that describes a calendar. The "VAGENDA" component is the encapsulating object for an entire calendar. (Section 9.1) VCALSTORE - Each CS contains one or more calendars (VAGENDAs), the "VCALSTORE" component is the encapsulating object that can hold all of the "VAGENDA" components along with any components and properties that are unique to the store level. (Section 9.2) VCAR - Calendar Access Rights are specified and encapsulated in the new iCalendar "VCAR" (Section 9.3) component. The "VCAR" component holds some new properties and at least one "VRIGHT" component. VRIGHT - (Section 9.4) This component encapsulates a set of instructions to the CS that define the rights or restrictions needed. VREPLY - (Section 9.5) This component encapsulates a set of data that can consist of an arbitrary amounts of properties and components. Its contents is dependent on the command that was issued. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 17] Internet-Draft Calendar Access Protocol (CAP) November 2002 VQUERY - The search operation makes use of a new component, called "VQUERY" (Section 9.6) and a new value type "CAL-QUERY" (Section 6.1.1). The "VQUERY" component is used to fetch objects from the CS. 2.2 Relationship of RFC-2446 (ITIP) and CAP [iTIP] describes scheduling methods which result in indirect manipulation of components. In CAP, the "CREATE" command is used to deposit entities into the store. Other CAP commands such as "DELETE", "MODIFY" and "MOVE" command values provide direct manipulation of components. In the CAP calendar store model, scheduling messages are conceptually kept separate from other components by their state. All scheduling operations and are as define in [iTIP]. This memo makes no changes to any of the workflow described in [iTIP]. In this memo referring to the presence of the "METHOD" property in an object is the same as saying an [iTIP] object. A CUA may create a "BOOKED" state object by depositing a iCalendar object into the store. This is done by depositing an object that does not have a "METHOD" property. The CS then knows to set the state of the object to the "BOOKED" state. If the object has a "METHOD" property then the object is stored in the "UNPROCESSED" state. If existing "UNPROCESSED" state objects exist in the CS for the same UID then a CUA may wish to consolidate the objects in to one "BOOKED" state object. The CUA would fetch the "UNPROCESSED" state objects for that UID and process them in the CUA as described in [iTIP]. Then if the CUA wished to book the UID, the CUA would issue a "CREATE" command to create the new "BOOKED" state object in the CS, followed by a "DELETE" command to remove any related old [iTIP] objects from the CS. And it might also involve having the CUA send some [iMIP] objects or contacting other CS's and performing CAP operations on those CSs. The CUA could also decide not to book the object. In which case the "UNPROCESSED" state objects could be removed from the CS or the CUA could set those object to the marked for delete state. The CUA could also ignore objects for later processing. The marked for delete state is used to keep the object around so that the CUA can process duplicate requests automatically. If a duplicate [iTIP] object is deposited into the CS and there exists identical marked for delete objects, then a CUA acting on behalf of the "OWNER" Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 18] Internet-Draft Calendar Access Protocol (CAP) November 2002 can silently drop those duplicate entries. Another purpose for the marked for delete state is so that when a CU decides they do not wish to have the object show in their calendar, the CUA can book the object; changing the "PARTSTAT" parameter to "DECLINED" in the "ATTENDEE" property that corresponds to their UPN. Perform an [iTIP] processing such as sending back a decline. Then mark that object as marked for delete. Their CUA might be configurable to automatically drop any updates for that object knowing the CU has already declined. When synchronizing with multiple CUAs, the marked for delete state could be used to inform the synchronization process that an object is to be deleted. How synchronization is done is not specified in this memo. Several "UNPROCESSED" state entries can be in the CS for the same UID. However once consolidated, then only one object exists in the CS and that is the booked object. The others MUST BE removed, or have their state changed to "DELETED". There MUST NOT BE more than one "BOOKED" state object in a calendar for the same "UID". The "ADD" method value may create multiple objects all in the "BOOKED" state for the same UID, however for the purpose of this memo, they are the same object that simply have multiple "VCALENDAR" components. For example, if you were on vacation, you could have receive a "REQUEST" method to attend a meeting and several updates to that meeting. Your CUA would have to issue "SEARCH" commands to find them in the CS using CAP, process them, determine what the final state of the object from a possible combination of user input and programmed logic. Then the CUA would instruct the CS to create a new booked object from the consolidated results. Finally, the CUA could do a "DELETE" command to remove the related "UNPROCESSED" state objects. See [iTIP] for details on resolving multiple [iTIP] scheduling entries. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 19] Internet-Draft Calendar Access Protocol (CAP) November 2002 3. CAP Design 3.1 System Model The system model describes the high level components of a calendar system and how they interact with each other. CAP is used by a CUA to send commands to and receive responses from a CS. The CUA prepares a [MIME] encapsulated command, sends it to the CS, and receives a [MIME] encapsulated response. The calendaring related information within these messages are represented by iCalendar objects. In addition the "GET-CAPABIBILITY" command can be sent from the CS to the CUA. There are two distinct protocols in operation to accomplish this exchange. [BEEP] is the transport protocol is used to move these encapsulations between a CUA and a CS. CAP's [BEEP] profile defines the application protocol where the content and semantics of the messages sent between the CUA and the CS are specified. 3.2 Calendar Store Object Model [iCAL] describes components such as events, todos, alarms, and timezones. [CAP] requires additional object infrastructure. In particular, detailed definitions of the containers for events and todos (calendars), access control objects, and a query language. The conceptual model for a calendar store is shown below. The calendar store (VCALSTORE - Section 9.2) contains "VCAR"s, "VQUERY"s, "VTIMEZONE"s, "VAGENDA"s and calendar store properties. Calendars (VAGENDAs) contain "VEVENT"s, "VTODO"s, "VJOURNAL"s, "VCAR"s, "VTIMEZONE"s, "VFREEBUSY", "VQUERY"s and calendar properties. The component "VCALSTORE" is used to denote the a root of the calendar store and contains all of the calendars. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 20] Internet-Draft Calendar Access Protocol (CAP) November 2002 Calendar Store VCALSTORE | +-- properties +-- VCARs +-- VQUERYs +-- VTIMEZONEs +-- VAGENDA | | | +--properties | +--VEVENTs | | | | | +--VALARMs | +--VTODOs | | | | | +--VALARMs | +--VJOURNALs | +--VCARs | +--VTIMEZONEs | +--VQUERYs | +--VFREEBUSYs | | | | ... . . +-- VAGENDA . . . . . . Calendars within a Calendar Store are identified by their unique Relative CALID. 3.3 Protocol Model CAP uses beep as the transport and authentication protocol. The initial charset MUST BE UTF-8 for the session in an unknown locale. If the CS supplied the BEEP 'localize' attribute in the BEEP 'greeting' then the CUA may tell the CS to switch locales for the session by issuing the "SET-LOCALE" CAP command and supplying one of the locales supplied by the BEEP 'localize' attribute. If supplied the first locale supplied in the BEEP 'localize' attribute MUST BE the default locale of the CS. The locale is switched only after a successful reply. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 21] Internet-Draft Calendar Access Protocol (CAP) November 2002 The "DEFAULT-CHARSET" property of the CS contains the list of charsets supported by the CS with the first value being the default for new calendars. If the CUA wishes to switch to one of those charsets for the session, the CUA issues the "SET-LOCALE" command. The CUA would have to first perform a "GET-CAPABILITY" command on the CS to get the list of charsets supported by the CS. The charset is switched only after a successful reply. The CUA may switch locales and charsets as needed. There is no requirement that a CS support multiple locales or charsets. 3.3.1 Use of BEEP, MIME and iCalendar CAP uses the BEEP application protocol over TCP. (refer to [BEEP] and [BEEPTCP] for more information). The default port that the Calendar Server listens for connections is on user port 1026. The BEEP data exchanged in CAP is a iCalendar MIME content that fully conforms to [iCAL] iCalendar format. This example tells the CS to generate and return 10 UIDs to be used by the CUA. (Note throughout this memo, 'C:' refers to what the CUA sends, 'S:' refers to what the CS sends, 'I:' refers to what the initiator sends, and 'L:' refers to what the listener sends. Where initiator and responder are used as defined in [BEEP].) C: MSG 1 2 . 432 62 C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD;ID=unique-per-cua-123;OPTIONS=10:GENERATE-UID C: END:VCALENDAR NOTE: The following examples will not include the BEEP header and footer information. Only the iCalendar objects that are sent between the CUA and CS will be shown as the BEEP payload boundaries are independent of CAP. The commands listed below are used to manipulate or access the data on the calendar store: ABORT - Sent to halt the processing of any command except ABORT. (Section 10.1.2) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 22] Internet-Draft Calendar Access Protocol (CAP) November 2002 CONTINUE - Sent to continue processing a command that has had its specified timeout time reached. (Section 10.1.3) CREATE - Create a new object on the CS. This can be implied for [iTIP] objects. Initiated by the CUA only. (Section 10.1.4) SET-LOCALE - Tell the CS to use any named locale and charset supplied. Initiated by the CUA only. (Section 10.9) DELETE - Delete objects from the CS. Initiated by the CUA only. Can also be used to mark a object for deletion. (Section 10.1.5) GENERATE-UID - Generate one or more unique ids. Initiated by the CUA only. (Section 10.2) GET-CAPABILITY - Query the capabilities the other end point of the session. (Section 10.3) IDENTIFY - Set a new identity for the session. Initiated by the CUA only. (Section 10.4) MODIFY - Modify components. Initiated by the CUA only. (Section 10.5) MOVE - Move components to another container. Initiated by the CUA only. (Section 10.6) REPLY - When replying to a command, the "CMD" value will be set to "REPLY" so that it will not be confused with a new command. (Section 10.7) SEARCH - Search for components. Initiated by the CUA only. (Section 10.8) TIMEOUT - Sent when a specified amount of time has lapsed and a command has not finished. (Section 10.10) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 23] Internet-Draft Calendar Access Protocol (CAP) November 2002 4. Security Model The BEEP transport performs all session authentication. 4.1 Calendar User and UPNs A CU is an entity that can be authenticated. It is represented in CAP as a UPN, which is a key part of access rights. The UPN representation is independent of the authentication mechanism used during a particular CUA/CS interaction. This is because UPNs are used within VCARs. If the UPN were dependent on the authentication mechanism, a VCAR could not be consistently evaluated. A CU may use one mechanism while using one CUA but the same CU may use a different authentication mechanism when using a different CUA, or while connecting from a different location. The user may also have multiple UPNs for various purposes. Note that the immutability of the user's UPN may be achieved by using SASL's authorization identity feature. (The transmitted authorization identity may be different than the identity in the client's authentication credentials.) [SASL, section 3]. This also permits a CU to authenticate using their own credentials, yet request the access privileges of the identity for which they are proxying SASL. Also, the form of authentication identity supplied by a service like TLS may not correspond to the UPNs used to express a server's access rights, requiring a server specific mapping to be done. The method by which a server determines a UPN, based on the authentication credentials supplied by a client, is implementation specific. See [BEEP] for authentication details; [BEEP] relies on SASL. 4.1.1 UPNs and Certificates When using X.509 certificates for purposes of CAP authentication, the UPN should appear in the certificate. Unfortunately there is no single correct guideline for which field should contain the UPN. From RFC-2459, section 4.1.2.6 (Subject): If subject naming information is present only in the subjectAlt- Name extension (e.g., a key bound only to an email address or URI), then the subject name MUST be an empty sequence and the subjectAltName extension MUST BE critical. Implementations of this specification MAY use these comparison rules to process unfamiliar attribute types (i.e., for name chaining). This allows implementations to process certificates Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 24] Internet-Draft Calendar Access Protocol (CAP) November 2002 with unfamiliar attributes in the subject name. In addition, legacy implementations exist where an RFC 822 name is embedded in the subject distinguished name as an EmailAddress attribute. The attribute value for EmailAddress is of type IA5String to permit inclusion of the character '@', which is not part of the PrintableString character set. EmailAddress attribute values are not case sensitive (e.g., "fanfeedback@redsox.com" is the same as "FANFEEDBACK@REDSOX.COM"). Conforming implementations generating new certificates with electronic mail addresses MUST use the rfc822Name in the subject alternative name field (see sec. 4.2.1.7 of [X509CRL]) to describe such identities. Simultaneous inclusion of the EmailAddress attribute in the subject distinguished name to support legacy implementations is deprecated but permitted. Since no single method of including the UPN in the certificate will work in all cases, CAP implementations MUST support the ability to configure what the mapping will be by the CS administrator. Implementations MAY support multiple mapping definitions, for example, the UPN may be found in either the subject alternative name field, or the UPN may be embedded in the subject distinguished name as an EmailAddress attribute. Note: If a CS or CUA is validating data received via [iMIP], if the "ORGANIZER" or "ATTENDEE" properties said (e.g.) "ATTENDEE;CN=Joe Random User:MAILTO:juser@example.com" then the email address should be checked against the UPN. This is so the "ATTENDEE" property cannot be changed to something misleading like "ATTENDEE;CN=Joe Rictus User:MAILTO:jrictus@example.com" and have it pass validation. Note that it is the email addresses that miscompare, the CN miscompare is irrelevant. 4.1.2 Anonymous Users and Authentication Anonymous access is often desirable. For example an organization may publish calendar information that does not require any access control for viewing or login. Conversely, a user may wish to view unrestricted calendar information without revealing their identity. 4.1.3 User Groups A User Group is used to represent a collection of CUs or other UGs that can be referenced in VCARs. A UG is represented in CAP as a UPN. The CUA cannot distinguish between a UPN that represents a CU or a UG. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 25] Internet-Draft Calendar Access Protocol (CAP) November 2002 UGs are expanded as necessary by the CS. The CS MAY expand a UG (including nested UGs) to obtain a list of unique CUs. Duplicate UPNs are filtered during expansion. How the UG expansion is maintained across commands is implementation specific. A UG may reference a static list of members, or it may represent a dynamic list. Operations SHOULD recognize changes to UG membership. CAP does not define commands or methods for managing UGs. 4.2 Access Rights Access rights are used to grant or deny access to calendars, components, properties, and parameters in a CS to a CU. CAP defines a new component type called a Calendar Access Right (VCAR). Specifically, a "VCAR" component grants, or denies, UPNs the right to search and write components, properties, and parameters on calendars within a CS. The "VCAR" component model does not put any restriction on the sequence in which the object and access rights are created. That is, an object associated with a particular "VCAR" component might be created before or after the actual "VCAR" component is defined. In addition, the "VCAR" and "VEVENT" components might be created in the same iCalendar object and passed together in a single object. All rights MUST BE denied unless specifically granted. If two rights specified in "VCAR" components are in conflict, the right that denies access always takes precedence over the right that grants access. Any attempt to create a "VCAR" component that conflicts with an immutable "VCAR" components must fail. 4.2.1 Access Control and NOCONFLICT The "TRANSP" property can take on values "TRANSPARENT-NOCONFLICT" and "OPAQUE-NOCONFLICT" that prohibit other components from overlapping it. This setting overrides access. The "ALLOW-CONFLICT" CS, Calendar or component setting may also prevent overlap, returning an error code "6.3". 4.2.2 Calendar Access Right (VCAR) Access rights within CAP are specified with the "VCAR" component, "RIGHTS" value type and the "GRANT", "DENY" and "CARID" properties. Properties within an iCalendar object are unordered. This also is Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 26] Internet-Draft Calendar Access Protocol (CAP) November 2002 the case for the "VCAR" component properties. 4.2.3 Predefined VCARs Predefined calendar access CARIDs that MUST BE implemented are: CARID:READBUSYTIMEINFO - Specifies the "GRANT" and "DENY" rules that allow UPNs to search "VFREEBUSY" components. An example definition for this VCAR is: BEGIN:VCAR CARID:READBUSYTIMEINFO BEGIN:VRIGHT GRANT:* PERMISSION:SEARCH SCOPE:SELECT * FROM VFREEBUSY END:VRIGHT END:VCAR CARID:REQUESTONLY - Specifies the "GRANT" and "DENY" rules to UPNs other than the owner of the calendar the ability to write new objects with the property "METHOD" property set to the "REQUEST" value. This CARID allows the owner to specify which UPNs are allowed to make scheduling requests. An example definition for this VCAR is: BEGIN:VCAR CARID:REQUESTONLY BEGIN:VRIGHT GRANT:NON CAL-OWNERS() PERMISSION:CREATE RESTRICTION:SELECT VEVENT FROM VAGENDA WHERE METHOD = 'REQUEST' RESTRICTION:SELECT VTODO FROM VAGENDA WHERE METHOD = 'REQUEST' RESTRICTION:SELECT VJOURNAL FROM VAGENDA WHERE METHOD = 'REQUEST' END:VRIGHT END:VCAR CARID:UPDATEPARTSTATUS - Grants to authenticated users the right to modify the instances of the "ATTENDEE" property set to one of their calendar addresses in any components for any booked Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 27] Internet-Draft Calendar Access Protocol (CAP) November 2002 component containing a "ATTENDEE" property. This allows (or denies) a CU the ability to update their own participation status in a calendar where they might not otherwise have "MODIFY" command access. They are not allowed to change the "ATTENDEE" property value. An example definition for this VCAR is (This example only effects the "VEVENT" components): BEGIN:VCAR CARID:UPDATEPARTSTATUS BEGIN:VRIGHT GRANT:* PERMISSION:MODIFY SCOPE:SELECT ATTENDEE FROM VEVENT WHERE ATTENDEE = SELF() AND ORGANIZER = CURRENT-TARGET() AND STATE() = 'BOOKED' RESTRICTION:SELECT * FROM VEVENT WHERE ATTENDEE = SELF() END:VRIGHT END:VCAR CARID:DEFAULTOWNER - Grants to any owner the permission they have for the target. An example definition for this VCAR is: BEGIN:VCAR CARID:DEFAULTOWNER BEGIN:VRIGHT GRANT:CAL-OWNERS() PERMISSION:* SCOPE:SELECT * FROM VAGENDA END:VRIGHT END:VCAR 4.2.4 Decreed VCARs A CS MAY choose to implement and allow persistent immutable VCARs that may be configured by the CS administrator. A reply from the CS may dynamically create "VCAR" components that are decreed depending on the implementation. To the CUA any "VCAR" component with the Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 28] Internet-Draft Calendar Access Protocol (CAP) November 2002 "DECREED" property set to "TRUE" can not be changed by the currently authenticated UPN, and depending on the implementation and other "VCAR" components; might not be able to be changed by any UPN using CAP, and never when the CUA gets a "DECREED:TRUE" VCAR. When a user attempts to modify or override a decreed "VCAR" component rules an error will be returned indicating that the user has insufficient authorization to perform the operation. The reply to the CUA MUST BE the same as if a non-decreed VCAR caused the failure. The CAP protocol does not define the semantics used to initially create a decreed VCAR. This administrative task is outside the scope of the CAP protocol. For example; an implementation or a CS administrator may wish to define a VCAR that will always allow the calendar owners to have full access to their own calendars. Decreed "VCAR" components MUST BE readable by the calendar owner in standard "VCAR" component format. 4.3 CAP Session Identity A BEEP session has an associated set of authentication credentials, from which is derived a UPN. This UPN is the identity of the CAP session, and is used to determine access rights for the session. The CUA may change the identity of a CAP session by calling the "IDENTIFY" command. The Calendar Server only permits the operation if the session's authentication credentials are good for the requested identity. The method of checking this permission is implementation dependent, but may be thought of as a mapping from authentication credentials to UPNs. The "IDENTIFY" command allows a single set of authentication credentials to choose from multiple identities, and allows multiple sets of authentication credentials to assume the same identity. For anonymous access the identity of the session is "@". A UPN with a null Username and null Realm is anonymous. A UPN with a null Username, but non-null Realm, such as "@foo.com" may be used to mean any identity from that Realm, which is useful to grant access rights to all users in a given Realm. A UPN with a non-null Username and null Realm, such as "bob@" could be a security risk and MUST NOT be used. Since the UPN includes Realm information it may be used to govern calendar store access rights across Realms. However, governing access rights across Realms is only useful if login access is Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 29] Internet-Draft Calendar Access Protocol (CAP) November 2002 available. This could be done through a trusted server relationship or a temporary account. Note that trusted server relationships are outside the scope of [CAP]. The "IDENTIFY" command also provides for a weak group implementation. By allowing multiple sets of authentication credentials belonging to different users to identify as the same UPN, that UPN essentially identifies a group of people, and may be used for group calendar ownership, or the granting of access rights to a group. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 30] Internet-Draft Calendar Access Protocol (CAP) November 2002 5. CAP URL and Calendar Address The CAP URL scheme is used to designate calendar stores and calendars accessible using the CAP protocol. The CAP URL scheme conform to the generic URL syntax, defined in RFC 2396, and follows the Guidelines for URL Schemes, set forth in RFC 2718. A CAP URL begins with the protocol prefix "cap" and is defined by the following grammar. capurl = "cap://" csid [ "/" relcalid ] csid = hostport ; As defined in Section 3.2.2 of RFC 2396 relcalid = *uric ; As defined in Section 2 of RFC 2396 A 'relcalid' is an identifier that uniquely identifies a calendar on a particular calendar store. There is no implied structure in a Relative CALID. It may refer to the calendar of a user or of a resource such as a conference room. It MUST BE unique within the calendar store. Examples: cap://cal.example.com cap://cal.example.com/Company/Holidays cap://cal.example.com/abcd1234Usr Relative CAP URLs are permitted and are resolved according to the rules defined in Section 5 of RFC 2396. Examples of valid relative CAP URLs: opqaueXzz123String UserName/Personal A Calendar addresses can be described as qualified or relative CAP URLs. For a user currently authenticated to the CS on cal.example.com, these two example calendar addresses refer to the same calendar: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 31] Internet-Draft Calendar Access Protocol (CAP) November 2002 cap://cal.example.com/abcd1234USR abcd1234USR Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 32] Internet-Draft Calendar Access Protocol (CAP) November 2002 6. New Value Types The following sections contains new components, properties, parameters, and value definitions. The purpose of these is to extend the iCalendar objects in a compatible way so that existing iCalendar "VERSION" property "2.0" value parsers can still parse the objects without modification. 6.1 Property Value Data Types 6.1.1 CAL-QUERY Value Type Subject: Registration of text/calendar MIME value type CAL-QUERY Value Name: CAL-QUERY Value Type Purpose: This value type is used to identify values and contains query statements targeted at locating those values. This is based on [SQL92] and [SQLCOM]. 1. For the purpose of a query, all components should be handled as tables, and the properties of those components, should be handled as columns. 2. All VAGENDAs and CS's look like tables for the purpose of a QUERY. And all of their properties look like columns in those tables. 3. You CAN NOT do any cross component-type joins. And that means you can ONLY have one component, OR one "VAGENDA" component OR one "VCALSTORE" component in the "FROM" clause. 4. Everything in the "SELECT" clause and "WHERE" clauses in MUST BE from the same component type, or "VAGENDA" component OR "VCALSTORE" component in the "FROM" clause. 5. When multiple "QUERY" properties are supplied in a single "VQUERY" component, the results returned are the same as the results returned for multiple "VQUERY" components having each a single "QUERY" property and the results are return in the same order as the "VQUERY" properties were specified in the original command. 6. The '.' is used to separate the table name (component) and column name (property or component) when selecting a property that is contained inside of a component that is targeted in the TARGET Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 33] Internet-Draft Calendar Access Protocol (CAP) November 2002 property. 7. A contained component without a '.' is not the same as "component-name.*". If given as "component-name" (no dot) the encapsulating BEGIN/END statement will be supplied for "component-name".: In this example the '.' is used to separate the "TRIGGER" property from its contained component (VALARM). Which is contained in any "VEVENT" component in the selected "TARGET" property value (a relcalid). All "TRIGGER" properties in any "VEVENT" component in relcalid would be returned. TARGET:relcalid QUERY:SELECT VALARM.TRIGGER FROM VEVENT SELECT VALARM FROM VEVENT WHERE UID = "123" This return one BEGIN/END "VALARM" component for each "VALARM" component in the matching "VEVENT" component. As there is no '.' (dot) in the VALARM after the SELECT above: BEGIN:VALARM TRIGGER;RELATED=END:PT5M REPEAT:4 ... END:VALARM BEGIN:VALARM TRIGGER;RELATED=START:PT5M DURATION:PT10M ... END:VALARM ... ... If provided as "component-name.*", then only the properties and any contained components will be returned: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 34] Internet-Draft Calendar Access Protocol (CAP) November 2002 SELECT VALARM.* FROM VEVENT WHERE UID = "123" Will return all of the properties in each "VALARM" component in the matching "VEVENT" component: TRIGGER;RELATED=END:PT5M REPEAT:4 ... TRIGGER;RELATED=START:PT5M DURATION:PT10M ... ... (a) SELECT FROM VEVENT (b) SELECT VALARM FROM VEVENT (c) SELECT VALARM.* FROM VEVENT (d) SELECT * FROM VEVENT (e) SELECT * FROM VEVENT WHERE VALARM.TRIGGER < '20020201T000000Z' AND VALARM.TRIGGER > '20020101T000000Z' Note: (a) Selects all instances of from all "VEVENT" components. (b) and (c) Select all "VALARM" components from all "VEVENT" components. (b) would return then in BEGIN/END VALARM tags. (c) would return all of the properties without BEGIN/END VALARM tags. (d) Selects every property and every component that is in any "VEVENT" component. (e) Selects all properties and all contained components in all "VEVENT" components that have a "VALARM" component with a "TRIGGER" property value between the provided dates and times. NOT VALID: (f) SELECT VEVENT.VALARM.TRIGGER FROM VEVENT Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 35] Internet-Draft Calendar Access Protocol (CAP) November 2002 (g) SELECT DTSTART,UID FROM VEVENT WHERE VTODO.SUMMERY = "Fix typo in CAP" Note: (f) Is NOT valid because it contains two '.' characters in the "SELECT" clause. (g) Is NOT valid because it mixes VEVENT and VTODO properties in the same VQUERY. Formal Definition: The value type is defined by the following notation: cal-query = "SELECT" SP cap-val SP "FROM" SP comp-name SP "WHERE" SP cap-expr / "SELECT" SP cap-cols SP "FROM" SP comp-name cap-val = cap-cols / param / ( cap-val "," cap-val ) ; NOTE: there is NO space around the "," on ; the next line cap-cols = cap-col / ( cap-cols "," cap-col) / "*" ; A 'cap-col' is: ; ; Any property name ('cap-prop') found in the component ; named in the 'comp-name' used in the "FROM" clause. ; ; SELECT ORGANIZER FROM VEVENT ... ; ; OR ; ; A component name ('comp-name') of an existing component ; contained inside of the 'comp-name' used in the "FROM" ; clause. ; ; SELECT VALARM FROM VEVENT ... ; ; OR ; ; A component name ('comp-name') of an existing Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 36] Internet-Draft Calendar Access Protocol (CAP) November 2002 ; component contained inside of the 'comp-name' used ; in the "FROM" clause folowed by a property ; name ('cap-prop') to be selected from that component. ; (comp-name "." cap-prop) ; ; SELECT VALARM.TRIGGER FROM VEVENT ... cap-col = comp-name / comp-name "." cap-prop comp-name = "VEVENT" / "VTODO" / "VJOURNAL" / "VFREEBUSY" / "VALARM" / "DAYLIGHT" / "STANDARD" / "VAGENDA" / "VCAR" / "VCALSTORE" / "VQUERY" / "VTIMEZONE" / x-comp / iana-comp cap-prop = ; A property that may be in the 'cap-comp' named ; in the "SELECT" clause. cap-expr = "(" cap-expr ")" / cap-term cap-term = cap-expr SP cap-logical SP cap-expr / cap-factor cap-logical= "AND" / "OR" cap-factor = cap-colval SP cap-oper SP col-value / cap-colval SP "NOT LIKE" SP col-value / cap-colval SP "LIKE" SP col-value / cap-colval SP "IS NULL" / cap-colval SP "IS NOT NULL" / col-value SP "NOT IN" cap-colval" / col-value SP "IN" cap-colval" / "STATE()" "=" ( "BOOKED" / "UNPROCESSED" / "DELETED" ) cap-colval = cap-col / param param = "PARAM(" cap-col "," cap-param ")" cap-param = ; Any parameter that may be contained in the cap-col ; in the supplied PARAM() function col-value = col-literal / "SELF()" / "CAL-OWNERS()" / "CAL-OWNERS(" cal-address ")" Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 37] Internet-Draft Calendar Access Protocol (CAP) November 2002 / "CURRENT-TARGET()" cal-address = ; A CALID as define by CAP col-literal = "'" literal-data "'" literal-data = ; Any data that matches the value type of the ; column that is being compared. That is you can ; not compare PRIORITY to "some string" because ; PRIORITY has a value type of integer. If it is ; not preceded by the LIKE element, any '%' and '_' ; characters in the literal data are not treated as ; wildcard characters and do not have to be backslash ; escaped. ; ; OR ; ; If the literal-data is preceded by the LIKE ; element it may also contain the '%' and '_' ; wildcard characters. And if the literal data ; that is comparing contains any '%' or '_' ; characters, they MUST BE backslash escaped as ; described in the notes below in order for them not ; to be treated as wildcard characters. cap-oper = "=" / "!=" / "<" / ">" / "<=" / ">=" SP = ; A single white space ascii character ; (value in HEX %x20). x-comp = ; As defined in RFC 2445 section 4.6 iana-comp = ; As defined in RFC 2445 section 4.6 6.1.1.1 [NOT] CAL-OWNERS() This function returns the list of "OWNER" properties for the named calendar when used in the "SELECT" clause. If called as 'CAL-OWNERS()', it is equivalent to the comma separated Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 38] Internet-Draft Calendar Access Protocol (CAP) November 2002 list of all of the owners of the calendar that match the provided "TARGET" property value. If the target is a "VCALSTORE", it returns the "CALMASTER" property. If called as 'CAL-OWNERS(cal-address)', then it is the equivalent to the comma separated list of owners for the named calendar id. If 'cal-address' is a CS, it returns the "CALMASTER" property. If used in the in the "WHERE" clause it then returns true if the currently authenticated UPN is an owner of the currently selected object matched in the provided "TARGET" property. Used in a CAL- QUERY "WHERE" clause and in the UPN-FILTER. 6.1.1.2 CURRENT-TARGET() Is equivalent to the value of the "TARGET" property in the current command. Used in a CAL-QUERY "WHERE" clause. 6.1.1.3 PARAM() Used in a CAL-QUERY. Returns the value of the named parameter from the named property. If there are multiple properties in the object, then PARAM() returns a comma separated list of parameter values. If needed each value can be quoted or contain backslash escaped contents. When used in a "SELECT" clause, it returns the entire property and all of that propertiies parameters (the result is not limited to the supplied parameter). If the property does not contain the named parameter, then the property is not returned (It could however be returned as a result of another "SELECT" clause value.) If multiple properties of the supplied name have the named parameter, all properties with that named parameter are returned. When used in the "WHERE" clause, a match is true when the parameter value is "IN" or "LIKE" compare clause according to the supplied WHERE values. If multiple named properties contain the named parameter, then each parameter value is compared to the condition and if any match, then the results would be true for that condition the same as if only one had existed. 6.1.1.4 SELF() Used in a CAL-QUERY "WHERE" clause. Returns the UPN of the currently authenticated UPN. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 39] Internet-Draft Calendar Access Protocol (CAP) November 2002 6.1.1.5 STATE() Returns one of three values, 'BOOKED', 'UNPROCESSED', or 'DELETED' depending on the state of the object. Used in a CAL-QUERY "WHERE" clause. 6.1.1.6 Ordering of Results Sorting will take place in the order the columns are supplied in the QUERY command. The CS MUST sort at least the first column. The CS MAY sort additional columns. Float and integer values MUST BE sorted by their numeric value. This means the result of a sort on an integer value type will be: 1, 2, 100, 1000 and not 1, 100, 1000, 2 This means the result of a sort on an float value type will be: 1.1, 2.23, 100.332, 1000.12 and not 1.1, 100.332, 1000.12, 2.23 Date and date time values will be sorted by their equivalent value in UTC. No matter what the returned time zone in the result set returns. This is so that if multiple components are returned each in a unique time zone, the results will be sorted in UTC. This does not mean the values MUST BE converted to UTC in the data returned to the CUA. It means the CS must do the sort in UTC. All other values are sorted according to the locale sorting order as specified in the command. Or the calendar locale if known, or the CS locale if the calendar does not have any locale set. And the locale to use for the sort is determined in that order. 6.1.1.7 Date sorting order If the cap-cols is only "*" and nothing else and the result set has a Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 40] Internet-Draft Calendar Access Protocol (CAP) November 2002 DTSTART, then: If EXPAND=FALSE sorting will be by the "DTSTART" property value ascending as if it were in UTC. If EXPAND=TRUE sorting will be by the "RECURRENCE-ID" property value ascending as if it were in UTC. If one or more "DTSTART" or "RECURRENCE-ID" property values in multiple components have exactly the same value, the order for those matching components is unspecified. If the selected component(s) do not contain a "DTSTART" property or a "RECURRENCE-ID" property, then the order is unspecified. If an instance does not have a "RECURRENCE-ID" property and the query compares "RECURRENCE-ID" properties (comparing a RECURRENCE-ID to the date or date/time of a single instance object), then the CS MUST compare the "DTSTART" property value as if it were a "RECURRENCE-ID" even for single instance objects that do not contain a "RECURRENCE- ID" property. A component with a DATE and no TIME value is returned before objects with both a DATE and TIME value when the dates of those two (or more) objects are the same, sorted by date. 6.1.1.8 Use of single quote All literal values are surrounded by single quotes ('), not double quotes ("), and not without any quotes. If the value contains quotes or any other ESCAPED-CHAR, they MUST BE backslash escaped as described in section "4.3.11 Text" of RFC2445. Any "LIKE" clause wildcard characters that are part of any literal data that is preceded by a "LIKE" clause and is not intended to mean wildcard search, MUST BE escaped as described in note (7) below. 6.1.1.9 Comparing DATE and DATE-TIME values When comparing "DATE-TIME" values to "DATE" values and when comparing "DATE" values to "DATE-TIME" values, the result will be true if the "DATE" value is on the same day as the "DATE-TIME" value. And they are compared in UTC no matter what time zone the data may actual have been stored in. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 41] Internet-Draft Calendar Access Protocol (CAP) November 2002 VALUE-1 VALUE-2 Compare Results 20020304 20020304T123456 TRUE (in UTC-3) (in UTC-3) 20020304 20020304T003456 FALSE (in UTC) (in UTC-4) 20020304T003456Z 20020205T003456 FALSE (in UTC-0) (in UTC-7) When the "DATE" value or "DATE-TIME" value is not associated with a time zone, then the CS will compare the value assuming that the no time zone values are in the calendars default time zone. When comparing "DATE" values and "DATE-TIME" values with the "LIKE" clause the comparison will be done as if the value is a RFC2445 DATE or DATE-TIME string value. LIKE '2002%' will match anything in the year 2002. LIKE '200201%' will match anything in January 2002. LIKE '%T000000' will match anything at midnight. LIKE '____01__T%' will match anything for any year or time that is in January. (Four '_', '01', two '_' 'T%'). Using a "LIKE" clause value of "%00%, would return any value that contained two consecutive zeros. All comparisons will be done in UTC. 6.1.1.10 DTEND and DURATION When a "QUERY" property value contains a "DTEND" value, then the CS MUST also evaluate any existing "DURATION" property value and determine if it has an effective end time that matches the "QUERY" property supplied "DTEND" value or any range of values supplied by the "QUERY" property. When a "QUERY" property contains a "DURATION" value, then the CS MUST also evaluate any existing "DTEND" property values and determine if they have an effective duration that matches the "QUERY" property Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 42] Internet-Draft Calendar Access Protocol (CAP) November 2002 value supplied "DURATION" value or any range of values supplied by the "QUERY" property. As "DTEND" value is the first time that is excluded from a components time range, any "DURATION" value supplied by the "QUERY" poperty value that is exactly one second less than the "DTEND" property value MUST match the QUERY. And if the "DURATION" property value ends exactly at the computed DTEND it MUST NOT match. Any "DTEND" value supplied by the "QUERY" property that is exactly one second more than an end time computed from a DURATION MUST match the QUERY. Any end time that is computed from a DURATION that exactly matches the supplied DTEND MUST NOT match. Given a meeting room reserved with a component that contains (date- time-example-1): DTSTART:20020127T000000Z DTEND:20020127T010000Z The reservation is really from: January 27th, 2002 00:00:00 To: January 27th, 2002,00:59:59 Given another meeting room reserved with a component that contains (date-time-example-2): DTSTART:20020127T000000Z DURATION:P59M59S The reservation is really from: January 27th, 2002 00:00:00 To: January 27th, 2002,00:59:59 A QUERY that contains: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 43] Internet-Draft Calendar Access Protocol (CAP) November 2002 ... VEVENT.DTSTART = '20020127T00000Z' AND VEVENT.DTEND = '20020127T010000Z' MUST match both (date-time-example-1) and (date-time-example-2) A QUERY that contains: ... VEVENT.DTSTART = '20020127T00000Z' AND DURATION = 'P59M59S' MUST match both (date-time-example-1) and (date-time-example-2) 6.1.1.11 [NOT] LIKE The pattern matching characters are the '%' that matches zero or more characters, and '_' that matches exactly one character (where character does not always mean octet). "LIKE" clause pattern matches always cover the entire string. To match a pattern anywhere within a string, the pattern must start and end with a percent sign. To match a '%' or '_' in the data and not have it interpreted as a wildcard character, they MUST BE backslash escaped. That is to search for a '%' or '_' in the string: LIKE '%\%%' Matches any string with a '%' in it. LIKE '%\_%' Matches any string with a '_' in it. Strings compared using the "LIKE" clause MUST BE performed using case in-sensitive comparisons when the locale allows. (Example: in US- ASCII the compare assumes 'a' = 'A'). If the "LIKE" clause is preceded by 'NOT' then there is a match when the string compare fails. Some property values (such as the 'recur' value type), contain commas and are not multi valued. The CS must understand the objects being compared and understand how to determine how any multi valued or multi instances properties or parameter values are separated, quoted, and backslash escaped and perform the comparisons as if each value existed by itself and not quoted or backslash escaped when comparing using the IN element. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 44] Internet-Draft Calendar Access Protocol (CAP) November 2002 See related examples in Section 6.1.1.13 6.1.1.12 Empty vs. NULL When used in a CAL-QUERY value, "NULL" means that the property or parameter is not present in the object. If the property (or parameter) exists, but has no value then "NULL" MUST NOT match. If the property (or parameter) exists, but has no value then it matches the empty string '' (quote quote). 6.1.1.13 [NOT] IN This is similar to the "LIKE" clause, except it does value matching and not string comparison matches. Some iCalendar objects can be multi instance and multi valued. The "IN" clause will return a match if the literal value supplied as part of the "IN" clause is contained in the value of any instance of the named property or parameter, or is in any of the multiple values in the named property or parameter. Unlike the "LIKE" clause, the '%' and '_' matching characters are not used with the "IN" clause and have no special meaning. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 45] Internet-Draft Calendar Access Protocol (CAP) November 2002 BEGIN:A-COMPONENT a property:value1,value2 One property, two values. b property:"value1,value2" One property, one value. c property:parameter=1,2:x One parameter, two values. d property:parameter="1,2",3:y One parameter, one value. e property:parameter=",":z One parameter, one value. f property:x,y,z One property, three values END:A-COMPONENT 'value1' IN property would match (a) only. 'value1,value2' IN property would match (b) only. 'value%' IN property would NOT match any. ',' IN property would NOT match any. '%,%' IN property would NOT match any. 'x' IN property would match (f) and (c). '2' IN parameter would match (c) only. '1,2' IN parameter would match (d) only. ',' IN parameter would match (e) only. '%,%' IN parameter would NOT match any. property LIKE 'value1%' would match (a) and (b). property LIKE 'value%' would match (a) and (b). property LIKE 'x' would match (f) and (c). parameter LIKE '1%' would match (c) and (d). parameter LIKE '%2%' would match (c) and (d). parameter LIKE ',' would match (e) only. Some property values (such as the "RECUR" value type), contain commas and are not multi valued. The CS must understand the objects being compared and understand how to determine how any multi valued or multi instances properties or parameter values are separated, quoted, and backslash escaped and perform the comparisons as if each value existed by itself and not quoted or backslash escaped when comparing using the IN element. If the "IN" clause is preceded by 'NOT' then there is a match when the value does not exist in the property or parameter value. 6.1.1.14 DATE-TIME and TIME values in a WHEN clause All "DATE-TIME" and "TIME" literal values supplied in a "WHEN" clause MUST BE terminated with 'Z'. That means that the CUA MUST supply the values in UTC. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 46] Internet-Draft Calendar Access Protocol (CAP) November 2002 Valid: WHERE alarm.TRIGGER < '20020201T000000Z' AND alarm.TRIGGER > '20020101T000000Z' Not valid and it is a syntax error and the CS MUST reject the QUERY. WHERE alarm.TRIGGER < '20020201T000000' AND alarm.TRIGGER > '20020101T000000' 6.1.1.15 Multiple contained components All comparisons MUST BE done from the same instance of a contained component or property and repeated for each instance. As in the following example that uses a "VALARM" component contained in a "VEVENT" component . If any instance of a "VALARM" component in any "VEVENT" component matches the query and the rest of the query is satisfied, then the "UID", "SUMMARY", and "DESCRIPTION" properties from all "VEVENT" components will be returned. If there were two "VALARM" components in a "VEVENT" component, then both "VALARM" components are tested and in this example only when the "VEVENT" component state is booked: BEGIN:VQUERY EXPAND:TRUE QUERY:SELECT UID,SUMMARY,DESCRIPTION FROM VEVENT WHERE VALARM.TRIGGER >= '20000101T030405Z' AND VALARM.TRIGGER <= '20001231T235959Z' AND STATE() = 'BOOKED' END:VQUERY 6.1.1.16 Example, Query by UID The following example would match the entire content of a "VEVENT" or "VTODO" component with the "UID" property equal to "uid123" and not expand any multiple instances of the component. If the CUA does not know if "uid123" was a "VEVENT", "VTODO", "VJOURNAL", or any other component, then all components that the CUA supports MUST BE supplied in a QUERY property. This example assumes the CUA is only interested in "VTODO" and "VEVENT" components. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 47] Internet-Draft Calendar Access Protocol (CAP) November 2002 If the results were empty it could also mean that "uid123" was a property in a component other than a VTODO or VEVENT. BEGIN:VQUERY QUERY:SELECT * FROM VTODO WHERE UID = 'uid123' QUERY:SELECT * FROM VEVENT WHERE UID = 'uid123' END:VQUERY 6.1.1.17 Query by Date-Time range This query selects the entire content of every booked "VEVENT" component that has an instance greater than or equal to July 1st, 2000 00:00:00 UTC and less than or equal to July 31st, 2000 23:59:59 UTC. This includes single instance "VEVENT" components that do no explicitly contain a "RECURRENCE-ID" property. BEGIN:VQUERY EXPAND:TRUE QUERY:SELECT * FROM VEVENT WHERE RECURRENCE-ID >= '20000801T000000Z' AND RECURRENCE-ID <= '20000831T235959Z' AND STATE() = 'BOOKED' END:VQUERY 6.1.1.18 Query for all Unprocessed Entries The following example selects the entire contents of all non-booked "VTODO" and "VEVENT" components in the "UNPROCESSED" state. The default for the "EXPAND" property is FALSE, so the recurrence rules will not be expanded. BEGIN:VQUERY QUERYID:Fetch VEVENT and VTODO iTIP components QUERY:SELECT * FROM VEVENT WHERE STATE() = 'UNPROCESSED' QUERY:SELECT * FROM VTODO WHERE STATE() = 'UNPROCESSED' END:VQUERY The following example fetches all "VEVENT" and "VTODO" components in Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 48] Internet-Draft Calendar Access Protocol (CAP) November 2002 the "BOOKED" state. BEGIN:VQUERY QUERYID:Fetch All Booked VEVENT and VTODO components QUERY:SELECT * FROM VEVENT WHERE STATE() = 'BOOKED' QUERY:SELECT * FROM VTODO WHERE STATE() = 'BOOKED' END:VQUERY The following fetches the "UID" property for all "VEVENT" and "fVTODO" components that have been marked for delete. BEGIN:VQUERY QUERYID:Fetch UIDs of marked for delete VEVENTs and VTODOs QUERY:SELECT UID FROM VEVENT WHERE STATE() = 'DELETE' QUERY:SELECT UID FROM VTODO WHERE STATE() = 'DELETE' END:VQUERY In the examples above they were bunched into groups of similar queries. They could be performed all at once by having all of the "QUERY" properties in one BEGIN/END "VQUERY" component. The replies MUST BE in the same order as the supplied "QUERY" properties. 6.1.1.19 Query with Subset of Properties by Date/Time In this example only the named properties will be selected and all booked and non-booked components will be selected that have a "DTSTART" value from February 1st to February 10th 2000 (in UTC). BEGIN:VQUERY QUERY:SELECT UID,DTSTART,DESCRIPTION,SUMMARY FROM VEVENT WHERE DTSTART >= '20000201T000000Z' AND DTSTART <= '20000210T235959Z' END:VQUERY 6.1.1.20 Query with Components and Alarms In A Range This example fetches all booked "VEVENT" components with an alarm that triggers within the specified time range. In this case only the "UID", "SUMMARY", and "DESCRIPTION" properties will be selected for all booked "VEVENTS" components that have an alarm between the two date-times supplied. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 49] Internet-Draft Calendar Access Protocol (CAP) November 2002 BEGIN:VQUERY EXPAND:TRUE QUERY:SELECT UID,SUMMARY,DESCRIPTION FROM VEVENT WHERE VALARM.TRIGGER >= '20000101T030405Z' AND VALARM.TRIGGER <= '20001231T235959Z' AND STATE() = 'BOOKED' END:VQUERY 6.1.2 UPN Value Type Value Name: UPN Purpose: This value type is used to identify values that contain user principal name of CU or group of CU. Formal Definition: The value type is defined by the following notation: upn = "@" / [ dot-atom-text ] "@" dot-atom-text ; dot-atom-text is defined in RFC 2822 Description: This data type is an identifier that denotes a CU or a group of CU. Example: The following is a UPN for a CU: jdoe@acme.com The following is a UPN for a group of CU: staff@acme.com The following is a UPN for an anonymous CU belonging to a specific realm: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 50] Internet-Draft Calendar Access Protocol (CAP) November 2002 @acme.com The following is a UPN for an anonymous CU: @ 6.1.3 UPN-FILTER Value Value Name: UPN-FILTER Purpose: This value type is used to identify values that contain a user principal name filter. Formal Definition: The value type is defined by the following notation: ; NOTE: "CAL-OWNERS(cal-address)" ; and "NOT CAL-OWNERS(cal-addres)" ; are both NOT allowed below. ; upn-filter = "CAL-OWNERS()" / "NOT CAL-OWNERS()" / "*" / [ "*" / dot-atom-text ] "@" ( "*" / dot-atom-text ) ; dot-atom-text is defined in RFC 2822 Description: The value is used to match user principal names (UPNs). For "CAL-OWNERS()" and "NOT CAL-OWNERS()", see Section 8.19. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 51] Internet-Draft Calendar Access Protocol (CAP) November 2002 * Matches all UPNs. @ Matches the UPN of anonymous CUs belonging to the null realm @* Matches the UPN of anonymous CUs belonging to any non-null realm @realm Matches the UPN of anonymous CUs belonging to the specified realm. *@* Matches the UPN of non-anonymous CUs belonging to any non-null realm *@realm Matches the UPN of non-anonymous CUs belonging to the specified realm user@realm Matches the UPN of the specified CU belonging to the specified realm user@* Not allowed. Example: The following are examples of this value type: DENY:NON CAL-OWNERS() Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 52] Internet-Draft Calendar Access Protocol (CAP) November 2002 7. New Parameters 7.1 ENABLE Parameter Parameter Name: ENABLE Purpose: This parameter indicates whether or not the "TRIGGER" property in a "VALARM" component should be ignored. Value Type: BOOLEAN Conformance: This property can be specified in the "TRIGGER" properties. Description: When a non owner sends an [iTIP] "REQUEST" to a calendar that object might contain a "VALARM" component. The owner may wish to have local control over their own CUA and when or how alarms are triggered. A CUA may add the "ENABLE" parameter to any "TRIGGER" property before booking the component. If the "ENABLE" parameter is set to "FALSE", then the alarm will be ignored by the CUA. If set to "TRUE", or if the "ENABLE" property is not in the "TRIGGER" property, the alarm is enabled. The CUA should remove the "ENABLE" parameter before forwarding the component to a non-cap CUA. Formal Definition: The property is defined by the following notation: enable-param = "ENABLE" "=" boolean Example: The following is an example of this property for a "VAGENDA" component: TRIGGER;ENABLE=FALSE;RELATED=END:PT5M 7.2 LOCAL Parameter Parameter Name: LOCAL Purpose: Indicates if the "VALARM" component should be exported to any non-organizer calendar. Value Type: BOOLEAN Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 53] Internet-Draft Calendar Access Protocol (CAP) November 2002 Conformance: This parameter can be specified in the "SEQUENCE" properties in a "VALARM" component. Description: When a non owner sends an [iTIP] "REQUEST" to a calendar that object might contain a "VALARM" component. The owner may wish to have local control over their own CUA and when or how alarms are triggered. A CUA may add the "LOCAL" parameter to the "SEQUENCE" property before booking the component. If the "LOCAL" parameter is set to "FALSE", then the alarm MUST NOT be forwarded to any non organizer calendar. If set to "TRUE", or of the "LOCAL" property is not in the "SEQUENCE" property, the alarm is global. The CUA should remove the "LOCAL" parameter before forwarding the component to a non-cap CUA and to non organizer calendars. Formal Definition: The property is defined by the following notation: local-param = "LOCAL" "=" boolean Example: The following is an example of this property for a "VAGENDA" component: SEQUENCE;LOCAL=TRUE:4 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 54] Internet-Draft Calendar Access Protocol (CAP) November 2002 8. New Properties 8.1 ALLOW-CONFLICT Property Property Name: ALLOW-CONFLICT Purpose: This property indicates whether or not the calendar and CS supports component conflicts. That is, whether or not any of the components in the calendar can overlap. Value Type: BOOLEAN Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VAGENDA" and "VCALSTORE" component. Description: This property is used to indicate whether components may conflict. That is, if their expanded instances may share the same time or overlap the same time periods. If it has a value of TRUE, then conflicts are allowed. If FALSE, the no two components may conflict. If FALSE in the "VCALSTORE" component, then all "VAGENDA" component "ALLOW-CONFLICT" property values MUST BE false in the CS. Formal Definition: The property is defined by the following notation: allow-conflict = "ALLOW-CONFLICT" *(";" xparam) ":" boolean CRLF Example: The following is an example of this property for a "VAGENDA" component: ALLOW-CONFLICT:FALSE 8.2 ATT-COUNTER Property Property Name: ATT-COUNTER Property Parameters: Non-standard property parameters can be specified on this property. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 55] Internet-Draft Calendar Access Protocol (CAP) November 2002 Conformance: This property MUST be specified in an iCalendar object that specifies counter proposal to a group scheduled calendar entity. When storing a "METHOD" property with the "COUNTER" method, there needs to be a way to remember who sent the COUNTER. The ATT-COUNTER property MUST BE added to all "COUNTER" [iTIP] components by the CUA before storing in a CS. Description: This property is used to identify the CAL-ADDRESS of the entity that sent the "COUNTER" [iTIP] object. Formal Definition: The property is defined by the following notation: attcounter = "ATT-COUNTER" *(";" xparam) ":" cal-address CRLF Examples: ATT-COUNTER:cap:example.com/Doug ATT-COUNTER:mailto:Doug@Example.com 8.3 CALID Property Property Name: CALID Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in the "VAGENDA" component. Description: This property is used to specify a fully qualified calid. Formal Definition: The property is defined by the following notation: CALID = "CALID" *(";" xparam) ":" calid CRLF Example: CALID:cap://cal.example.com/sdfifgty4321 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 56] Internet-Draft Calendar Access Protocol (CAP) November 2002 8.4 CALMASTER Property Property Name: CALMASTER Purpose: The property specifies an e-mail address of a person responsible for the calendar store. Value Type: URI Property Parameters: Non-standard property parameters can be specified on this property. Conformance: The property can be specified in a "VCALSTORE" component. Description: The parameter value SHOULD BE a MAILTO URI as defined in [URL]. It MUST BE a contact URI such as a MAILTO URI and not a home page or file URI that describes how to contact the calmasters. Formal Definition: The property is defined by the following notation: calmaster = "CALMASTER" *(";" xparam) ":" uri CRLF uri = IANA registered uri and defined by RFC 2445 Example: The following is an example of this property: CALMASTER:mailto:administrator@example.com 8.5 CARID Property Property Name: CARID Purpose: This property specifies the identifier for an access right component. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property MUST BE specified once in a "VCAR" component. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 57] Internet-Draft Calendar Access Protocol (CAP) November 2002 Description: This property is used in the "VCAR" component to specify an identifier. A "CARID" property value is unique per container. Formal Definition: The property is defined by the following notation: carid = "CARID" *(";" xparam) ":" text CRLF Example: The following are examples of this property: CARID:xyzzy-007 CARID:User Rights 8.6 CSID Property Property Name: CSID Purpose: The property specifies a the globally unique identifier for the calendar store. Value Type: URI Property Parameters: Non-standard property parameters can be specified on this property. Conformance: The property can be specified in a "VCALSTORE" component. Description: The identifier MUST BE globally unique. Formal Definition: The property is defined by the following notation: csid = "CSID" *(";" xparam) ":" capurl CRLF Example: The following is an example of this property: CSID:cap://calendar.example.com Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 58] Internet-Draft Calendar Access Protocol (CAP) November 2002 8.7 DECREED Property Property Name: DECREED Purpose: This property specifies if an access right calendar component is decreed or not. Value Type: BOOLEAN Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property MAY be specified once in a "VCAR" component. Description: This property is used in the "VCAR" component to specify whether the component is decreed or not. Formal Definition: The property is defined by the following notation: decreed = "DECREED" *(";" xparam) ":" boolean CRLF Example: The following is an example of this property: DECREED:TRUE 8.8 DEFAULT-CHARSET Property Property Name: DEFAULT-CHARSET Purpose: This property indicates the default charset. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VAGENDA" and "VCALSTORE" calendar component. Description: In a "VAGENDA" component, this property is used to indicate the charset of calendar. If not specified, the default is the first value in the "VCALSTORE" components "DEFAULT-CHARSET" Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 59] Internet-Draft Calendar Access Protocol (CAP) November 2002 property value list. The value MUST BE an IANA registered character set as defined in [CHARREG]. In a "VCALSTORE" component it is a comma separated list of charsets supported by the CS. The first entry is the default entry for all newly created "VAGENDA" components. The "UTF-8" value MUST BE in the "VCALSTORE" component "DEFAULT-CHARSET" property list. All compliant CAP implementations must support the "UTF-8" charset. If a charset name contains a comma (,), then that comma must be backslashed escaped in the value. Formal Definition: The property is defined by the following notation: default-charset = "DEFAULT-CHARSET" *(";" xparam) ":" text CRLF Example: The following is an example of this property for a "VAGENDA" component: DEFAULT-CHARSET:Shift_JIS,UTF-8 8.9 DEFAULT-LOCALE Property Property Name: DEFAULT-LOCALE Purpose: This property specifies the default language for text values. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VAGENDA" and "VCALSTORE" components. Description: In a "VAGENDA" component, the "DEFAULT-LOCALE" property is used to indicate the locale of the calendar. The full locale SHOULD be used. The default and minimum locale is POSIX (aka the 'C' locale). In a "VCALSTORE" component it is a comma separated list of locales Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 60] Internet-Draft Calendar Access Protocol (CAP) November 2002 supported by the CS. The first value in the list is the default for all newly created VAGENDAs. "POSIX" MUST BE in the list. Formal Definition: The property is defined by the following notation: default-locale = "DEFAULT-LOCALE" *(";" xparam) ":" language CRLF language = Text identifying a locale, as defined in [CHARPOL] Example: The following is an example of this property: DEFAULT-LOCALE:en-US.iso-8859-1,POSIX 8.10 DEFAULT-TZID Property Property Name: DEFAULT-TZID Purpose: This property specifies the text value that specifies the default time zone for a calendar. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property may be specified once in a "VAGENDA" and "VCALSTORE" components. Description: In a "VAGENDA" component it is the value of the time zone for the calendar. This time zone is used when as the localtime for object that contain a date or date-time value without a time zone. In a "VCALSTORE" component it is a comma separated list of TZIDs known to the CS. Where "TZID" property values are the same as the "TZID" property as defined in [iCAL]. The first entry in the list is used as the default TZID for all newly created calendars. The list MUST contain at least "UTC". If a "TZID" property value contains a comma (,), the comma must be backslash escaped. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 61] Internet-Draft Calendar Access Protocol (CAP) November 2002 Formal Definition: This property is defined by the following notation: default-tzid = "DEFAULT-TZID" *(";" xparam) ":" [tzidprefix] text CRLF Example: The following is an example of this property: DEFAULT-TZID:US/Eastern,UTC 8.11 DEFAULT-VCARS Property Property Name: DEFAULT-VCARS Purpose: This property is used to specify the "CARID" property ids of the default "VCAR" components for newly created "VAGENDA" components. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property MUST BE specified in "VCALSTORE" calendar component and MUST at least specify the following values: "READBUSYTIMEINFO", "REQUESTONLY", "UPDATEPARTSTATUS", and "DEFAULTOWNER". Description: This property is used in the "VCALSTORE" component to specify the "CARID" value of the "VCAR" components that MUST BE copied into now "VAGENDA" components at creation time by the CS. All "DEFAULT-VCAR" values must have "VCARS" components stored in the "VCALSTORE". Formal Definition: The property is defined by the following notation: def-vcars = "DEFAULT-VCARS" *(";" xparam) ":" text *( "," text ) CRLF Example: The following is an example of this property: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 62] Internet-Draft Calendar Access Protocol (CAP) November 2002 DEFAULT-VCARS:READBUSYTIMEINFO,REQUESTONLY, UPDATEPARTSTATUS,DEFAULTOWNER 8.12 DENY Property Property Name: DENY Purpose: This property identifies the UPN(s) being denied access in the "VRIGHT" component. Value Type: UPN-FILTER Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VRIGHT" components. Description: This property is used in the "VRIGHT" component to define the CU or UG being denied access. Formal Definition: The property is defined by the following notation: deny = "DENY" *(";" xparam) ":" upn-filter CRLF Example: The following are examples of this property: DENY:* DENY:bob@example.com 8.13 EXPAND property Property Name: EXPAND Purpose: This property is to notify the CS if it should or should not expand any component with recurrence rules into multiple instances in a query reply. Value Type: BOOLEAN Property Parameters: Non-standard property parameters can be Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 63] Internet-Draft Calendar Access Protocol (CAP) November 2002 specified on this property. Conformance: This property can be specified in "VQUERY" components. Description: If a CUA wishes to see all of the instances of a recurring component the CUA sets EXPAND=TRUE in the "VQUERY" component. If not specified, the default is FALSE. Formal Definition: The property is defined by the following notation: expand = "EXPAND" *(";" xparam) ":" ("TRUE" / "FALSE") CRLF Example: The following are examples of this property: EXPAND:FALSE EXPAND:TRUE 8.14 GRANT Property Property Name: GRANT Purpose: This property identifies the UPN(s) being granted access in the "VRIGHT" component. Value Type: UPN-FILTER Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VRIGHT" calendar components. Description: This property is used in the "VRIGHT" component to specify the CU or UG being granted access. Formal Definition: The property is defined by the following notation: grant = "GRANT" *(";" xparam) ":" upn-filter CRLF Example: The following are examples of this property: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 64] Internet-Draft Calendar Access Protocol (CAP) November 2002 GRANT:* GRANT:bob@example.com 8.15 MAXDATE Property Property Name: MAXDATE Purpose: This property specifies the date/time in the future beyond which the CS cannot represent. Value Type: DATE-TIME Property Parameters: Non-standard property parameters can be specified on this property. Conformance: The property can be specified in the "VCALSTORE" component. Description: The date and time MUST BE a UTC value and end with 'Z'. Formal Definition: The property is defined by the following notation: maxdate = "MAXDATE" *(";" xparam) ":" date-time CRLF Example: The following is an example of this property: MAXDATE:20990101T000000Z 8.16 MINDATE Property Property Name: MINDATE Purpose: This property specifies the date/time in the past prior to which the server cannot represent. Value Type: DATE-TIME Property Parameters: Non-standard property parameters can be specified on this property. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 65] Internet-Draft Calendar Access Protocol (CAP) November 2002 Conformance: The property can be specified in the "VCALSTORE" component. Description: The date and time MUST BE a UTC value and end with 'Z'. Formal Definition: The property is defined by the following notation: mindate = "MINDATE" *(";" xparam) ":" date-time CRLF Example: The following is an example of this property: MINDATE:19710101T000000Z 8.17 MULTIPART Property Property Name: MULTIPART Purpose: This property provides a comma separated list of supported MIME multipart types supported by the sender. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in a component. Description: This property is used in the in the "GET-CAPABILITY" comamnd reply to indicated the MIME multipart types supported. A CS and CUS SHOULD support all registered MIME multipart types. Formal Definition: The property is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 66] Internet-Draft Calendar Access Protocol (CAP) November 2002 name = "MULTIPART" nameparam ":" text CRLF nameparam = *( ; the following is optional, ; and MAY occur more than once ( ";" xparam ) ) Example: The following is an example of this property: MULTIPART:related,alternate,mixed 8.18 NAME Property Property Name: NAME Purpose: This property provides a localizable display name for a component. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in a component. Description: This property is used in the in component to specify a localizable display name. If more than one "NAME" properties are in a component, then they MUST have unique "LANG" parameters. If the "LANG" parameter is not supplied, then it defaults to the "VAGENDA" default if the component is in a "VAGENDA", or the "VCALSTORE" default if the component is stored at the "VCALSTORE" level. Formal Definition: The property is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 67] Internet-Draft Calendar Access Protocol (CAP) November 2002 name = "NAME" nameparam ":" text CRLF nameparam = *( ; the following is optional, ; but MUST NOT occur more than once ( ";" languageparam ) / ; the following is optional, ; and MAY occur more than once ( ";" xparam ) ) languageparam = ; As defined in [iCAL]. Example: The following is an example of this property: NAME:Restrict Guests From Creating VALARMs On VEVENTs 8.19 OWNER Property Property Name: OWNER Purpose: The property specifies an owner of the component. Value Type: UPN Property Parameters: Non-standard, alternate text representation and language property parameters can be specified on this property. Conformance: The property MUST BE specified at in a "VAGENDA" component. Description: A multi-instanced property indicating the calendar owner. Formal Definition: The property is defined by the following notation: owner = "OWNER" *(";" xparam) ":" upn CRLF Example: The following is an example of this property: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 68] Internet-Draft Calendar Access Protocol (CAP) November 2002 OWNER:jsmith@acme.com OWNER:jdoe@acme.com 8.20 PERMISSION Property Property Name: PERMISSION Purpose: This property defines a permission that is granted or denied in a "VRIGHT" component. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VRIGHT" components. Description: This property is used in the "VRIGHT" component to define a permission that is granted or denied. Formal Definition: The property is defined by the following notation: perm = "PERMISSION" *(";" xparam) ":" permvalue CRLF permvalue = ( "SEARCH" / "CREATE" / "DELETE" / "MODIFY" / all ) all = "*" Example: The following is an example of this property: PERMISSION:SEARCH 8.21 QUERY property Property Name: QUERY Purpose: Specifies the query for the component. Value Type: CAL-QUERY Property Parameters: Non-standard property parameters can be Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 69] Internet-Draft Calendar Access Protocol (CAP) November 2002 specified on this property. Conformance: This property can be specified in "VQUERY" components. Description: A "QUERY" is used to specify the "CAL-QUERY" (Section 6.1.1 for the query. Formal Definition: The property is defined by the following notation: query = "QUERY" *(";" xparam) ":" cal-query CRLF Example: The following is an example of this property: QUERY:SELECT * FROM VEVENT 8.22 QUERYID property Property Name: QUERYID Purpose: Specifies a unique ID for a query in the targeted container. Value Type: TEXT Property Parameters: Non-standard property parameters are specified on this property. Conformance: This property can be specified in "VQUERY" components. Description: A "QUERYID" property is used to specify the unique id for a stored query. A "QUERYID" property value is unique per container. Formal Definition: The property is defined by the following notation: queryid = "QUERYID" *(";" xparam) ":" text CRLF Example: The following are examples of this property: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 70] Internet-Draft Calendar Access Protocol (CAP) November 2002 QUERYID:Any Text String QUERYID:fetchUnProcessed 8.23 REQUEST-STATUS property This description is a revision of the "REQUEST-STATUS" property for VCALENDAR version 2.0. The 'statdesc' is optional and the 'extdata' may be included when 'statdesc' is not provided. rstatus = "REQUEST-STATUS" rstatparam ":" statcode ";" *(statdesc ) ";" *(extdata) rstatparam = *( ; the following is optional, ; but MUST NOT occur more than once (";" languageparm) / ; the following is optional, ; and MAY occur more than once (";" xparam) ) statcode = 1*DIGIT *("." 1*DIGIT) ;Hierarchical, numeric return status code statdesc = text ;An optional textual status description, content is ;decided by the implementor. May be empty. extdata = text ; Textual exception data. For example, the offending ; property name and value or complete property line. Example: The following are some possible examples of this property. The COMMA and SEMICOLON separator characters in the property value are BACKSLASH character escaped because they appear in a text value. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 71] Internet-Draft Calendar Access Protocol (CAP) November 2002 REQUEST-STATUS:2.0;Success REQUEST-STATUS:3.1;Invalid property value;DTSTART:96-Apr-01 REQUEST-STATUS:2.8; Success\, repeating VEVENT ignored. Scheduled as a single VEVENT.;RRULE:FREQ=WEEKLY;INTERVAL=2 REQUEST-STATUS:4.1;Time conflict. Date/time is busy. REQUEST-STATUS:3.7;Invalid calendar user;ATTENDEE: MAILTO:jsmith@example.com REQUEST-STATUS:3.7;;ATTENDEE:MAILTO:jsmith@example.com REQUEST-STATUS:10.4;Help! That really shouldn't have happened. 8.24 RESTRICTION Property Property Name: RESTRICTION Purpose: This property defines restrictions on the result value of new or existing components. Value Type: CAL-QUERY Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VRIGHT" components, but only when the "PERMISSION" property is set to "CREATE", "MODIFY", or "*" property value. Description: This property is used in the "VRIGHT" component to define restrictions on the components that can be written (i.e., by using the "CREATE" or "MOVE" commands) as well as on the values that may take existent calendar store properties, calendar properties, components, and properties (i.e., by using the "MODIFY" command). Accepted values MUST match any specified "RESTRICTION" property values. Formal Definition: The property is defined by the following notation: restrict = "RESTRICTION" *(";" xparam) ":" cal-query CRLF Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 72] Internet-Draft Calendar Access Protocol (CAP) November 2002 Example: The following are examples of this property: RESTRICTION:SELECT * FROM VCALENDAR WHERE METHOD = 'REQUEST' RESTRICTION:SELECT * FROM VEVENT WHERE SELF() IN ORGANIZER RESTRICTION:SELECT * FROM VEVENT WHERE 'BUSINESS' IN CATEGORIES 8.25 SCOPE Property Property Name: SCOPE Purpose: This property identifies the objects in the CS to which the access rights applies. Value Type: CAL-QUERY Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in "VRIGHT" components. Description: This property is used in the "VRIGHT" component to define the set of objects subject to the access right being defined. Formal Definition: The property is defined by the following notation: scope = "SCOPE" *(";" xparam) ":" cal-query CRLF Example: The following is an example of this property: SCOPE:SELECT DTSTART,DTEND FROM VEVENT WHERE CLASS = 'PUBLIC' 8.26 TARGET Property Property Name: TARGET Purpose: This property defines the container that the command that is Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 73] Internet-Draft Calendar Access Protocol (CAP) November 2002 issued will act upon. Its value is a capurl as defined in Section 5. The "TARGET" property MUST BE supplied when the CUA sends a command to the CS. Value Type: URI Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in a command component. Description: This property value is used to specify the container that the command will effect. When used in a command, the command will be performed on the container which has a capurl matching the value. Formal Definition: The property is specified by the following notation: target = "TARGET" *(";" xparam) ":" capurl CRLF The following is an example of this property: TARGET:cap://mycal.example.com TARGET:SomeRelCalid 8.27 TRANSP Property Property Name: TRANSP Purpose: This property defines whether an component is transparent or not to busy time searches. This is a modification to [iCAL] "TRANSP" property in that it adds some values. Value Type: TEXT Property Parameters: Non-standard property parameters can be specified on this property. Conformance: This property can be specified in a component. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 74] Internet-Draft Calendar Access Protocol (CAP) November 2002 Description: Time Transparency is the characteristic of an object that determines whether it appears to consume time on a calendar. Objects that consume actual time for the individual or resource associated with the calendar SHOULD be recorded as "OPAQUE", allowing them to be detected by free-busy time searches. Other objects, which do not take up the individual's (or resource's) time SHOULD be recorded as "TRANSPARENT", making them invisible to free-busy time searches. Formal Definition: The property is specified by the following notation: transp = "TRANSP" *(";" xparam) ":" transvalue CRLF transvalue = "OPAQUE" ;Blocks or opaque on busy time searches. / "TRANSPARENT" ;Transparent on busy time searches. / "TRANSPARENT-NOCONFLICT" ; Transparent on busy time ; searches and no other OPAQUE or OPAQUE-NOCONFLICT objects ; can overlap it. / "OPAQUE-NOCONFLICT" ; Opaque on busy time ; searches and no other OPAQUE or OPAQUE-NOCONFLICT objects ; can overlap it. ; ;Default value is OPAQUE The following is an example of this property for an object that is opaque or blocks on free/busy time searches plus no other object can overlap it: TRANSP:OPAQUE-NOCONFLICT Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 75] Internet-Draft Calendar Access Protocol (CAP) November 2002 9. New Components 9.1 VAGENDA Component Component Name: VAGENDA Purpose: Provide a grouping of properties that defines an agenda. Formal Definition: There are two formats of the "VAGENDA" component. (1) When it is being created, and (2) how it exists in the "VCALSTORE" component. A "VAGENDA" component in a "VCALSTORE" component is defined by the following notation table and ABNF notation. The following is a summary of the properties of a calendar. Name Read Description Only ------------------------------------------------------------------ ALLOW-CONFLICT N This boolean value indicates whether or not the calendar supports object conflicts. That is, whether or not any of the components in the calendar can have a time overlap. MUST BE FALSE if VCALSTORE ALLOW-CONFLICT is FALSE. CALID N A unique identifier within the VCALSTORE for the calendar. MUST NOT BE empty. MUST BE a relative calid in a VAGENDA. CALSCALE N The CALSCALE for this calendar. MUST BE from the VCALSTORE CALSCALE list. The default is the first entry in the VCALSTORE CALSCALE list. CREATED Y timestamp of the calendar's create date. DEFAULT-CHARSET N The charset for this calendar. MUST BE from the VCALSTORE DEFAULT-CHARSET list. If empty then it is the first entry in the VCALSTORE DEFAULT-CHARSET list. DEFAULT-LOCALE N The locale for this calendar. MUST BE from the VCALSTORE DEFAULT-LOCALE list. If empty then it is the first entry in the VCALSTORE DEFAULT-CHARSET list. DEFAULT-TZID N The id of the timezone associated with this Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 76] Internet-Draft Calendar Access Protocol (CAP) November 2002 calendar. If empty it is the first entry in VCALSTORE DEFAULT-TZID. LAST-MODIFIED Y The timestamp when the properties of the calendar were last updated. NAME N Optional display name for this calendar. It is a localizable string. May be multiple instance and no two instances may have the same LANG parameter. All instances MUST have the LANG parameter. OWNER N A multi-instanced property indicating the calendar owner. Each entry returned will be a UPN. There MUST BE at least one owner. RELATED-TO N An optional multi-instance property indicating any relationship to other CALIDs and their CALIDs. agenda = "BEGIN" ":" "VAGENDA" CRLF agendaprop "END" ":" "VAGENDA" CRLF agendaprop = *( ; The following MUST occur exactly once. ; allow-conflict / calid / calscale / created / default-charset / default-locale / default-tzid / last-modified / ; The following MUST occur at least once. ; and the value MUST NOT be empty. / owner ; The following are optional, ; and MAY occur more than once. / name / related-to / iana-token / x-prop / x-comp ) When creating a VAGENDA, use the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 77] Internet-Draft Calendar Access Protocol (CAP) November 2002 agendac = "BEGIN" ":" "VAGENDA" CRLF agendacprop "END" ":" "VAGENDA" CRLF agendacprop = *( ; The following MUST occur exactly once. ; allow-conflict / calid / calscale / default-charset / default-locale / default-tzid / ; The following MUST occur at least once. ; and the value MUST NOT be empty. ; / owner ; The following are optional, ; and MAY occur more than once. ; / name / related-to / iana-token / x-prop / x-comp ) To fetch all of the properties from the targeted "VAGENDA" component. This does not fetch any components: SELECT * FROM VAGENDA To fetch all of the properties from the targeted VAGENDA and all of the contained components, use the special '*.*' value: SELECT *.* FROM VAGENDA 9.2 VCALSTORE Component Component Name: VCALSTORE Purpose: Provide a grouping of properties that defines a calendar store. Formal Definition: A "VCALSTORE" component is defined by the Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 78] Internet-Draft Calendar Access Protocol (CAP) November 2002 following table and ABNF notation. The creation of a "VCALSTORE" component is an administrative task and not part of the CAP protocol. The following is a summary of the properties of the calendar store. Name Read Description Only ------------------------------------------------------------------- ALLOW-CONFLICT Y This boolean value indicates Whether or not the VCALSTORE supports object conflicts. That is, whether or not any of the objects in any calendar can overlap. If FALSE, then the CS does not allow conflicts for any object in any calendar. How this property is set in the VCALSTORE is an administrative or implementation specific issue and is not covered in CAP. CALSCALE Y A comma separated list of CALSCALEs supported by this CS. All Calendar CALSCALE properties MUST BE from this list. MUST contain at least "GREGORIAN". The default for newly created calendars is the first entry. How this property is set in the VCALSTORE is an administrative or implementation specific issue and is not covered in CAP. CALMASTER N URL of contact address for person responsible. SHOULD BE mailto URL. MUST BE an IANA registered URL scheme. This is to allow external entities a contact point for the CS. CHILDREN N A multi instance property that lists all of the calendars in this VCALSTORE. The values are the relative CSID for each calendar. CREATED Y The timestamp of the CS creation time. CSID Y The CSID of this calendar store. MUST NOT be empty. How this property is set in the VCALSTORE is an administrative or implementation specific issue and is not covered in CAP. DEFAULT-CHARSET Y A comma separated lists of charsets supported by this CS. MUST contain at least "UTF-8". The first is the default for all newly created calendars. How this property is set in the VCALSTORE is an administrative or implementation Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 79] Internet-Draft Calendar Access Protocol (CAP) November 2002 specific issue and is not covered in CAP. DEFAULT-LOCALE Y A comma separated list of locales supported by this CS. MUST contain at least one entry. ("en_US" for example). The first is the default for all newly created calendars. There is no default for this property in the VCALSTORE. DEFAULT-VCARS N A multivalued property containing the CARID's for the default VCARs for newly created top level calendars. It MUST include at a minimum READBUSYTIMEINFO, REQUESTONLY, UPDATEPARTSTATUS, and DEFAULTOWNER. DEFAULT-TZID N A comma separated list of TZID's supported by the CS. These will be known across all calendars. Calendar entries take precedence if they exist in both the CS and calendar. It MUST include at least UTC. First entry is default for all newly created calendars. LAST-MODIFIED Y The timestamp when the Properties of the CS were last updated or calendars were created or deleted. NAME N Optional, multi instance display names for this CS. It is a localizable string. May be multiple instance and no two instances may have the same LANG parameter. All instances MUST have the LANG parameter in the VCALSTORE. RELATED-TO N An optional multi-instance property indicating any relationship to other CSs and those CALIDs. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 80] Internet-Draft Calendar Access Protocol (CAP) November 2002 calstorec = "BEGIN" ":" "VCALSTORE" CRLF calstoreprop "END" ":" "VCALSTORE" CRLF calstoreprop = *( ; the following MUST occur exactly once allow-conflict / calscale / calmaster / created / csid / default-charset / default-locale / default-vcars / default-tzid / last-modified ; the following are optional, ; and MAY occur more than once / children / name / related-to ) To fetch all of the properties from the targeted VCALSTORE and not fetch the calendars that it contains: SELECT * FROM VCALSTORE To fetch all of the properties from the targeted "VCALSTORE" component and all of the contained calendars and all of those calendars contained properties and components, use the special '*.*' value: SELECT *.* FROM VCALSTORE 9.3 VCAR Component Component Name: VCAR Purpose: Provide a grouping of calendar access rights. Formal Definition: A "VCAR" component is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 81] Internet-Draft Calendar Access Protocol (CAP) November 2002 carc = "BEGIN" ":" "VCAR" CRLF carprop 1*rightc "END" ":" "VCAR" CRLF carprop = 1*( ; 'carid' is REQUIRED, ; but MUST NOT occur more than once carid / ; the following are OPTIONAL, ; and MAY occur more than once name / x-prop / iana-prop ) Description: A "VCAR" component is a grouping of properties, and "VRIGHT" components, that represents access rights granted or denied to UPNs. The "CARID" property specifies the local identifier for the "VCAR" component. The "NAME" property specifies a localizable display name. Example: In the following example, the UPN "foo@example.com" is given search access to the "DTSTART" and "DTEND" VEVENT properties. No other access is specified: BEGIN:VCAR CARID:View Start and End Times NAME:View Start and End Times BEGIN:VRIGHT GRANT:foo@example.com PERMISSION:SEARCH SCOPE:SELECT DTSTART,DTEND FROM VEVENT END:VRIGHT END:VCAR In this example, all UPNs are given search access to "DTSTART" and "DTEND" properties of VEVENT components. "All CUs and UGs" are specified by the UPN value "*". Note that this enumerated UPN value is not in quotes: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 82] Internet-Draft Calendar Access Protocol (CAP) November 2002 BEGIN:VCAR CARID:ViewStartEnd2 NAME:View Start and End Times 2 BEGIN:VRIGHT GRANT:* PERMISSION:SEARCH SCOPE:SELECT DTSTART,DTEND FROM VEVENT END:VRIGHT END:VCAR In these examples, full calendar access rights are given to the CAL- OWNERS(), and a hypothetical administrator is given access rights to specify calendar access rights. If no other rights are specified, only these two UPNs can specify calendar access rights: BEGIN:VCAR CARID:some-id-3 NAME:Only OWNER or ADMIN Settable VCARs BEGIN:VRIGHT GRANT:CAL-OWNERS() PERMISSION:* SCOPE:SELECT * FROM VAGENDA END:VRIGHT BEGIN:VRIGHT GRANT:cal-admin@example.com PERMISSION:* SCOPE:SELECT * FROM VCAR RESTRICTION:SELECT * FROM VCAR END:VRIGHT END:VCAR In this example, rights to write, search, modify or delete calendar access rights are denied to all UPNs. This example would disable providing different access rights to the calendar store or calendar. This calendar access right should be specified with great care, as it removes the ability to change calendar access; even for the owner or administrator. It could be used by small devices that do not support the changing of any VCAR: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 83] Internet-Draft Calendar Access Protocol (CAP) November 2002 BEGIN:VCAR CARID:VeryRestrictiveVCAR-2 NAME:No CAR At All BEGIN:VRIGHT DENY:* PERMISSION:* SCOPE:SELECT * FROM VCAR END:VRIGHT END:VCAR 9.4 VRIGHT Component Component Name: "VRIGHT" Purpose: Provide a grouping of properties that describe an access right (granted or denied). Formal Definition: A "VRIGHT" component is defined by the following notation: rightc = "BEGIN" ":" "VRIGHT" CRLF rightprop "END" ":" "VRIGHT" CRLF rightprop = 2*( ; either 'grant' or 'deny' MUST ; occur at least once ; and MAY occur more than once grant / deny / ; 'permission' MUST occur at least once ; and MAY occur more than once permission / ; the following are optional, ; and MAY occur more than once scope / restriction / x-prop / iana-prop ) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 84] Internet-Draft Calendar Access Protocol (CAP) November 2002 Description: A "VRIGHT" component is a grouping of calendar access right properties. The "GRANT" property specifies the UPN that is being granted access. The "DENY" property specifies the UPN is being denied access. The "PERMISSION" property specifies the actual permission being set. The "SCOPE" property identifies the calendar store properties, calendar properties, components, or properties to which the access right applies. The "RESTRICTION" property specifies restriction on the value that may take calendar store properties, calendar properties, calendar components, and properties after a "CREATE" or "MODIFY" command. Values MUST match all the instances of the "RESTRICTION" property to be valid. 9.5 VREPLY Component Component Name: "VREPLY" Purpose: Provide a grouping of arbitrary properties and components that are the data set result from an issued command. Formal Definition: A "VREPLY" component is defined by the following notation: replyc = "BEGIN" ":" "VREPLY" CRLF any-prop-or-comp "END" ":" "VREPLY" CRLF any-prop-or-comp = ; Zero or more iana or experimental ; properties and components, in any order. Description: Provide a grouping of arbitrary properties and components that are the data set result from an issued command. A query can return a predictable set of arbitrary properties and components. This component is used by query and other commands to return data that does not fit into any other component. It may contain any valid property or component, even if they are not registered. 9.6 VQUERY Component Component Name: VQUERY Purpose: A component to specify what is to be fetched from a CS. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 85] Internet-Draft Calendar Access Protocol (CAP) November 2002 Formal Definition: A "VQUERY" component is defined by the following notation: queryc = "BEGIN" ":" "VQUERY" CRLF queryprop "END" ":" "VCAR" CRLF queryprop = 1*( ; 'queryid' is OPTIONAL but MUST NOT occur ; more than once. If the "TARGET" property ; is supplied then the "QUERYID" property ; MUST BE supplied. ; queryid / target ; the following are OPTIONAL, and MAY occur ; more than once ; / name / x-prop / iana-prop ; the following MUST occur at least once. ; / query ) Description: A "VQUERY" contains properties that specify which properties and components the CS is requested to return during a SEARCH command. The "QUERYID" property specifies the local identifier for a stored "VQUERY" component. The "NAME" property specifies a localizable display name of a stored "VQUERY" component. Normally "NAME" and "QUERYID" properties are used when looking for a correct stored "VQUERY" component, or when storing a "VQUERY" component. For a search, if the "TARGET" property is supplied in a "VQUERY" component, then the CS is to search for the query in the calid supplied by the "TARGET" property value. For a create the "TARGET" property MUST NOT be supplied as the destination container is already supplied in the "TARGET" property of the "VCALENDAR" component. For examples, see Section 6.1.1. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 86] Internet-Draft Calendar Access Protocol (CAP) November 2002 10. Commands and Responses CAP commands and responses are described in this section. 10.1 CAP Commands (CMD) All commands are send using the CMD property. Property Name: CMD Purpose: The property defines the command to be sent. Value Type: TEXT Property Parameters: Non-standard, id, localize, latency, action or options. Conformance: This property is the method used to specify the commands to a CS and can exist in any object sent to the CS. Description: All of the command to the CS are supplied in this property. The "OPTIONS" parameter is overloaded and its meaning is dependent on the CMD value supplied. Formal Definition: The property is defined by the following notation: cmd = "CMD" ( / abort-cmd / continue-cmd / create-cmd / delete-cmd / generate-uid-cmd / get-capability-cmd / identify-cmd / modify-cmd / move-cmd / reply-cmd / search-cmd / set-locale-cmd ) CRLF id-param = ";" "ID" "=" unique-id ; The text value supplied is a unique value ; shared between the CUA and CS to uniquely ; identify the instance of command in the ; the current CUA session. The value has Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 87] Internet-Draft Calendar Access Protocol (CAP) November 2002 ; no meaning to other CUAs or other sessions. unique-id = ; text localize-param = ";" "LOCALIZE" "=" beep-localize ; The value supplied MUST BE one value from the initial ; BEEP greeting 'localize' attribute specifying ; the locale to use for error messages during ; this instance of the command sent. beep-localize = ; text latency-param = ";" "LATENCY" "=" latency-sec ; The value supplied in the time in seconds. ; If latency is supplied then action MUST BE ; supplied. latency-sec = integer action-parm = ";" "ACTION" "=" ( "ASK" / "ABORT" ) ; If latency is supplied then action MUST BE ; supplied. option-param = ";" "OPTIONS" "=" cmd-specific cmd-specific = ; The value supplied is dependent on the ; CMD value. See the specific CMDs below ; for the correct values to use for each ; CMD. option-value = paramtext Calendaring commands allow a CUA to directly manipulate a calendar. Calendar access rights can be granted or denied for any commands. 10.1.1 Bounded Latency A CAP command can have an associated maximum latency time by specifying the "LATENCY" parameter. If the command is unable to be completed in the specified amount of time (as specified by the "LATENCY" parameter value), then a "TIMEOUT" command MUST BE sent on the same channel to which there MUST BE a an "ABORT" or a "CONTINUE" command reply. If the CUA initiated the original command, then the CS would issue the "TIMEOUT" command and the CUA would then have to issue an "ABORT" or "CONTINUE" command. If the CS initiated the Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 88] Internet-Draft Calendar Access Protocol (CAP) November 2002 original command then the CUA would have to issue the "TIMEOUT" and the CS would send the "ABORT" or "CONTINUE". Upon receiving an "ABORT" command, the command must then be terminated. Only the "ABORT", "TIMEOUT", "REPLY, and "CONTINUE" commands can not be aborted. The "ABORT", "TIMEOUT", and "REPLY" commands MUST NOT have latency set. Upon receiving a "CONTINUE" command the work continues. Note that a new latency time MAY BE included in a "CONTINUE" command indicating to continue the original command until the "LATENCY" parameter value expires or the results of the original command can be returned. Both the "LATENCY" parameter and the "ACTION" parameter MUST BE supplied to any "CMD" property, or nether can be added to the "CMD" property. The "LATENCY" parameter MUST BE set to the maximum latency time in seconds. The "ACTION" parameter accepts the following values: "ASK" and "ABORT" parameters. If the maximum latency time is exceeded and the "ACTION" parameter is set to the "ASK" value, then "TIMEOUT" command MUST BE sent. Otherwise if the "ACTION" parameter is set to the "ABORT" value then the command MUST BE terminated and return a REQUEST-STATUS code of 2.0.3 for the original command. If a CS can both start sending the reply to a command and guarantee that all of the results can be sent from a command (short of something like network or power falure), prior to the "LATENCY" timeout value, then the "LETENCY" time has not expired. Example: In this example the initiator asks for the listeners capabilities. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 89] Internet-Draft Calendar Access Protocol (CAP) November 2002 I: Content-Type: text/calendar I: I: BEGIN:VCALENDAR I: VERSION:2.0 I: PRODID:The CUA's PRODID I: CMD;ID=xyz12346;LATENCY=3;ACTION=ask:GET-CAPABILITY I: END:VCALENDAR # After 3 seconds L: Content-Type: text/calendar L: L: BEGIN:VCALENDAR L: PRODID:-//someone's prodid L: VERSION:2.0 L: CMD;ID=xyz12346:TIMEOUT L: END:VCALENDAR In order to continue and give the CS more time then the CUA would issue a "CONTINUE" command: I: Content-Type: text/calendar I: I: BEGIN:VCALENDAR I: VERSION:2.0 I: PRODID:-//someone's prodid I: CMD;ID=xyz12346;LATENCY=3;ACTION=ask:CONTINUE I: END:VCALENDAR L: Content-Type: text/calendar L: L: BEGIN:VCALENDAR L: VERSION:2.0 L: PRODID:-//someone's prodid L: CMD;ID=xyz12346:REPLY L: BEGIN:VREPLY L: REQUEST-STATUS:2.0.3;Continued for 3 more seconds L: END:VREPLY L: END:VCALENDAR To abort the command and not wait any further then issue an "ABORT" command: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 90] Internet-Draft Calendar Access Protocol (CAP) November 2002 I: Content-Type: text/calendar I: I: BEGIN:VCALENDAR I: VERSION:2.0 I: PRODID:-//someone's prodid I: CMD;ID=xyz12346:ABORT I: END:VCALENDAR # Which would result in a 2.0.3 reply. L: Content-Type: text/calendar L: L: BEGIN:VCALENDAR L: VERSION:2.0 L: PRODID:-//someone's prodid L: CMD;ID=xyz12346:REPLY L: BEGIN:VREPLY L: REQUEST-STATUS:2.0.3;Aborted As Requested. L: END:VREPLY L: END:VCALENDAR 10.1.2 ABORT Command CMD: ABORT Purpose: The "ABORT" command is sent to request that the named or only in process command be aborted. Latency MUST not be supplied with the "ABORT" command. Formal Definition: An "ABORT" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 91] Internet-Draft Calendar Access Protocol (CAP) November 2002 abort-cmd = abortparam ":" "ABORT" abortparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) The REPLY of any "ABORT" command is: abort-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops abort-vreply "END" ":" "VCALENDAR" CRLF abort-vreply = "BEGIN" ":" "VREPLY" CRLF request-status *(x-prop) "END" ":" "VREPLY" CRLF 10.1.3 CONTINUE Command CMD: CONTINUE Purpose: The "CONTINUE" command is only sent after a "TIMEOUT" command has been received to inform the other end of the session to resume working on a command. Formal Definition: A "CONTINUE" command is defined by the following notation: continue-cmd = continueparam ":" "CONTINUE" continueparam = *( Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 92] Internet-Draft Calendar Access Protocol (CAP) November 2002 ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) The REPLY of any "CONTINUE" command is: continue-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops continue-vreply "END" ":" "VCALENDAR" CRLF continue-vreply = "BEGIN" ":" "VREPLY" CRLF request-status *(x-prop) "END" ":" "VREPLY" CRLF 10.1.4 CREATE Command CMD: CREATE Purpose: The "CREATE" command is used to create one or more iCalendar objects in the store in the "BOOKED" or "UNPROCESSED" state. A CUA MAY send a "CREATE" command to a CS. The "CREATE" command MUST BE implemented by all CSs. The CS MUST NOT send a "CREATE" command to any CUA. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 93] Internet-Draft Calendar Access Protocol (CAP) November 2002 Formal Definition: A "CREATE" command is defined by the following notation: create-cmd = createparam ":" "CREATE" createparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) Response: One iCalendar object per TARGET property MUST BE returned. The REPLY of any "CREATE" command is: Restriction Table for the iCalendar section of a reply that contains an iCalendar object is any valid [iTIP] response plus any from this restriction table: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 94] Internet-Draft Calendar Access Protocol (CAP) November 2002 create-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops 1*(create-vreply) "END" ":" "VCALENDAR" CRLF create-vreply = "BEGIN" ":" "VREPLY" CRLF created-id request-status *(x-prop) "END" ":" "VREPLY" CRLF ; Where the id is appropriate for the ; type of object created: ; ; VAGENDA = calid ; VCAR = carid ; VEVENT, VFREEBUSY, VJOURNAL, VTODO = uid ; VQUERY = queryid ; x-component = x-id ; created-id = ( calid / carid / uid / queryid / tzid / sequence / x-id) The "TARGET" property specifies the containers where the component(s) will be created. This can be a "CSID", or a "CALID" value type. If the iCalendar object being created does not have a "METHOD" property, then is not an [iTIP] object, then its state will be "BOOKED". Use the "DELETE" command to set the state of an object to the "DELETED" state. A CUA can not use the "CREATE" command to create an object in the "DELETED" state. If an [iTIP] object is being booked, then the "METHOD" property MUST NOT BE supplied". Otherwise any [iTIP] object MUST have a valid [iTIP] "METHOD" property value and it is a scheduling request being deposited into the CS and will have its state set to "UNPROCESSED" state. Restriction table for the "CREATE" command: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 95] Internet-Draft Calendar Access Protocol (CAP) November 2002 create-minimum = "BEGIN" ":" "VCALENDAR" CRLF calprops *(iana-prop) *(x-prop) 1*(create-comp) "END" ":" "VCALENDAR" CRLF ; If The following contain the "METHOD" ; property they MUST conform to [iTIP]. ; create-comp = agendac / carc / queryc / timezonec / freebusyc / eventc / todoc / journalc / iana-comp / x-component In the following example, two new top level "VAGENDA" components are created. Note that the "CSID" value of the server is cal.example.com which is where the new "VAGENDA" components are going to be created. C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: PRODID:-//someone's prodid C: VERSION:2.0 C: CMD;ID=creation01:CREATE C: TARGET:cal.example.com C: BEGIN:VAGENDA <- data for 1st new calendar C: CALID:relcalz1 C: NAME;LANGUAGE=en_US:Bill's Soccer Team C: OWNER:bill C: CALMASTER:mailto:bill@example.com C: TZID:US/Pacific C: END:VAGENDA C: BEGIN:VAGENDA <- data for 2nd new calendar C: CALID:relcalz2 C: NAME;LANGUAGE=EN-us:Mary's personal calendar C: OWNER:mary C: CALMASTER:mailto:mary@example.com C: TZID:US/Pacific C: END:VAGENDA C: END:VCALENDAR When there are multiple "TARGET" properties in the original command object then the replies MUST BE in the exact same order as they were Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 96] Internet-Draft Calendar Access Protocol (CAP) November 2002 provided to the CS. The same is true for the objects created, their responses MUST BE in the exact same order as they were supplied to the CS. S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: CMD;ID=creation01:REPLY S: TARGET:cal.example.com S: BEGIN:VREPLY <- Reply for 1st calendar create S: CALID:relcalz1 S: REQUEST-STATUS:2.0 S: END:REPLY S: BEGIN:VREPLY <- Reply for 2nd calendar create S: CALID:relcalz2 S: REQUEST-STATUS:2.0 S: END:VREPLY S: END:VCALENDAR To create a new component in multiple containers simply name all of the containers in the "TARGET" in the create command. Here a new "VEVENT" component is created in two TARGET components. In this example, the "VEVENT" component is one new [iTIP] "REQUEST" to be stored in two calendars. The results would be iCalendar objects that conform to the [iTIP] replies as defined in [iTIP]. The "VREPLY" components MUST always be returned in the same order that the objects were listed in the original "CREATE" command. If there are multiple "TARGET" properties and components in the same create command then the reply is first listed by the "TARGET" order of the original create command, then component replies within that "TARGET" are ordered the same as in the original create command. This example shows two "VEVENT" components being created in each of the two supplied "TARGET" properties: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 97] Internet-Draft Calendar Access Protocol (CAP) November 2002 C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD;ID=creation02:CREATE C: METHOD:REQUEST C: TARGET:relcalz1 C: TARGET:relcalz2 C: BEGIN:VEVENT C: DTSTART:20030307T180000Z C: UID:FirstInThisExample-1 C: DTEND:20030307T190000Z C: SUMMARY:Important Meeting C: END:VEVENT C: BEGIN:VEVENT C: DTSTART:20040307T180000Z C: UID:SecondInThisExample-2 C: DTEND:20040307T190000Z C: SUMMARY:Important Meeting C: END:VEVENT C: END:VCALENDAR The CS could send the "VREPLY" commands in separate MIME objects, one per supplied "TARGET" property value. S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: CMD;ID=creation02:REPLY S: TARGET:relcalz1 <- 1st TARGET listed S: BEGIN:REPLY <- Reply for 1st VEVENT create in 1st TARGET. S: UID:FirstInThisExample-1 S: REQUEST-STATUS:2.0 S: END:VREPLY S: BEGIN:REPLY <- Reply for 2nd VEVENT crate in 1st TARGET. S: UID:SecondInThisExample-2 S: REQUEST-STATUS:2.0 S: END:VREPLY S: END:VCALENDAR And could send the second part of the reply later: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 98] Internet-Draft Calendar Access Protocol (CAP) November 2002 S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: CMD;ID=creation02:REPLY S: TARGET:relcalz2 <- 2nd TARGET listed S: BEGIN:REPLY <- Reply for 1st VEVENT create in 2nd TARGET. S: UID:FirstInThisExample-1 S: REQUEST-STATUS:2.0 S: END:VREPLY S: BEGIN:REPLY <- Reply for 2nd VEVENT crate in 2nd TARGET. S: UID:SecondInThisExample-2 S: REQUEST-STATUS:2.0 S: END:VREPLY S: END:VCALENDAR 10.1.5 DELETE Command CMD: DELETE Purpose: The "DELETE" command physically removes the QUERY result from the store or marks it for deletion. A CUA MAY send a "DELETE" command to a CS. The "DELETE" command MUST BE implemented by all CSs. The CS MUST NOT send a "DELETE" command to any CUA. Formal Definition: A "DELETE" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 99] Internet-Draft Calendar Access Protocol (CAP) November 2002 delete-cmd = deleteparam ":" "DELETE" deleteparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param / option-param "MARK" ; The following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) The "DELETE" command is used to delete calendars or components. The included "VQUERY" component(s) specifies the container(s) to delete. If a component is to be marked for delete and not physically removed, then include the "OPTIONS" parameter with its value set to the "MARK" value in order to alter its state to "DELETED". When components are deleted, only the top most component "REQUEST- STATUS" properties are returned. No "REQUEST-STATUS" properties are returned for components inside of the selected components. There MUST BE one "VREPLY" component returned for each object that is deleted or marked for delete. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 100] Internet-Draft Calendar Access Protocol (CAP) November 2002 Restriction Table for the "REPLY" command for any "DELETE" command. delete-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops 1*(delete-vreply) "END" ":" "VCALENDAR" CRLF delete-vreply = "BEGIN" ":" "VREPLY" CRLF deleted-id request-status "END" ":" "VREPLY" CRLF ; Where the id is appropriate for the ; type of object deleted: ; ; VAGENDA = calid ; VCAR = carid ; VEVENT, VFREEBUSY, VJOURNAL, VTODO = uid ; VQUERY = queryid ; ALARM = sequence ; x-component = x-id ; deleted-id = ( calid / carid / uid / uid dtstamp / queryid / tzid / sequence / x-id ) Example to delete a "VEVENT" component with "UID" value of 'abcd12345' from the calendar "relcald-22" from the current CS: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 101] Internet-Draft Calendar Access Protocol (CAP) November 2002 C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: TARGET:relcalid-22 C: CMD;ID:"random but unique per CUA":DELETE C: BEGIN:VQUERY C: QUERY:SELECT * FROM VEVENT WHERE UID = 'abcd12345' C: END:VQUERY C: END:VCALENDAR S: BEGIN:VCALENAR S: TARGET:relcalid-22 S: CMD;ID:"random but unique per CUA":REPLY S: BEGIN:VREPLY S: UID:abcd12345 S: REQUEST-STATUS:3.0 S: END:VREPLY S: END:VCALENDAR One or more iCalendar objects will be returned that contain a "REQUEST-STATUS" properties for the deleted components. There could have been more than one component deleted, Any booked and any number of unprocessed [iTIP] scheduling components that matched the QUERY value in the above example. Each unique "METHOD" property value that was deleted from the store MUST BE in a separate iCalendar object. This is because only one "METHOD" property is allowed in a single "VCALENDAR" BEGIN/END block. 10.2 GENERATE-UID Command CMD: GENERATE-UID Purpose: The "GENERATE-UID" command returns one or more unique identifiers which MUST BE globally unique. The "GENERATE-UID" command MAY BE sent to any CS. The "GENERATE-UID" command MUST BE implemented by all CSs. The "GENERATE-UID" command MUST NOT be sent to a CUA. Formal Definition: A "GENERATE-UID" command is defined by the following notation: generate-uid-cmd = genuidparam ":" "GENERATE-UID" genuidparam = *( Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 102] Internet-Draft Calendar Access Protocol (CAP) November 2002 ; The following are optional, ; but MUST NOT occur more than once. id-param / localize-param / latency-param ; The following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; The following is optional, ; and MAY occur more than once. / (";" xparam) ; The following MUST BE supplied exactly once. ; The value specifies the number of UIDs to ; be returned. / option-param integer ) Response: gen-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops 1*(gen-vreply) "END" ":" "VCALENDAR" CRLF gen-vreply = "BEGIN" ":" "VREPLY" CRLF *(uid) request-status "END" ":" "VREPLY" CRLF Example: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD;ID=unique-per-cua-124;OPTIONS=5:GENERATE-UID C: END:VCALENDAR Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 103] Internet-Draft Calendar Access Protocol (CAP) November 2002 S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: CMD;ID=unique-per-cua-124:REPLY S: BEGIN:VREPLY S: UID:20011121T120000Z-12340@cal.example.com S: UID:20011121T120000Z-12341@cal.example.com S: UID:20011121T120000Z-12342@cal.example.com S: UID:20011121T120000Z-12343@cal.example.com S: UID:20011121T120000Z-12344@cal.example.com S: REQUEST-STATUS:2.0 S: END:VREPLY S: END:VCALENDAR 10.3 GET-CAPABILITY Command CMD: GET-CAPABILITY Purpose: The "GET-CAPABILITY" command returns the capabilities of the other end of the session. A CUA MUST send a "GET-CAPABILITY" command to a CS after the initial connection. The "GET-CAPABILITY" command MUST BE implemented by all CSs. The CS MUST send a "GET-CAPABILITY" command to a CUA after the initial connection. The CUA MUST recogonize the "GET-CAPABILITY" command and MAY return a not implemented reply meaning that the CUA supports only the default capababilities. Formal Definition: A "GET-CAPABILITY" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 104] Internet-Draft Calendar Access Protocol (CAP) November 2002 get-capability-cmd = capibiltyparam ":" "GET-CAPABILITY" capibiltyparam = *( ; the following are optional, ; but MUST NOT occur more than once ; id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. ; / action-param ; the following is optional, ; and MAY occur more than once ; / (";" xparam) ) Response: The "GET-CAPABILITY" command returns information about the Calendar other end of the session given the current state of the connection. The values returned may differ depending on current user identify and the security level of the connection. Client implementations SHOULD NOT require any capability element beyond those defined in this specification, and MAY ignore any nonstandard, experimental capability elements. The "GET-CAPABILITY" reply may return different results depending on the UPN and if the UPN is authenticated. When sending a reply to a "GET-CAPABILITY" command, all of these MUST BE supplied. If the CUA does not support sending a full reply and sends not-implemented error, then the CS MUST assume the CUA supports the default values as defined below. A CS MUST always send the full reply when queried. When the CUA does not support sending a "GET-CAPABILITY" reply, then the CS MUST assume the defaults listed below. The following properties are returned in response to a "GET-CAPABILITY" command: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 105] Internet-Draft Calendar Access Protocol (CAP) November 2002 Name Occurs Description ------------------------------------------------------------------ CAP-VERSION 1 Version of CAP. It MUST include at least "1.0" for this version of CAP. Like the "VERSION" property, it may have a range. Uses the exact same syntax as the "VERSION" property value. The default is "1.0". CAR-LEVEL 1 Indicates level of CAR support. CAR-NONE, CAR-MIN or CAR-FULL-1. If CAR-FULL-1 is supplied then CAR-MIN MUST BE assumed. A CAR-MIN implementation only supports the DEFAULT-VCARS listed in the VCALSTORE and does not support the creation or modification of VCARS. The default is CAR-NONE. COMPONENTS 1 A comma separated list of the names of components that are supported. This includes any components inside of other components (VALARM for example). It MUST include at least VCALSTORE, VCALENDAR, VREPLY, and VAGENDA and at least one of VEVENT, VTODO, VTIMEZONE, or VJOURNAL. The defalt is "VCALSTORE,VCALENDAR,VREPLY,VAGENDA, VEVENT,VALARM,VTIMEZONE,VJOURNAL,VTODO, DAYLIGHT,STANDARD" STORES-EXPANDED 1 If TRUE then it expands multiple instances separately when they are stored (RRULEs converted to RDATEs) and when sent. If FALSE then it expands instances dynamically during sending. Default is FALSE. DATE-MAX 1 The datetime value in UTC beyond which the server cannot accept. The default and and maximum value allowed is 99991231T235959Z. DATE-MIN 1 The datetime value in UTC prior to which the server cannot accept. The default and minimum value allowed is 00000101T000000Z. ITIP-VERSION 1 Version(s) of ITIP, it MUST include at least the default value of "2446" to specify RFC-2446 support. Comma separated list. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 106] Internet-Draft Calendar Access Protocol (CAP) November 2002 MAX-COMPONENT-SIZE 1 A positive integer value that specifies the size of the largest iCalendar object that can be accepted in octets. Objects larger than this will be rejected. A default value of zero (0) means no limit. This is also the maximum value of any BEEP payload that will be accepted or sent. MULTIPART 1 A comma separated list of MIME multipart the sender supports in lower case. The default is no multipart support (empty list). Example: MULTIPART:related,alternate PRODID 1 The product id. If supplied in the "VCALENDAR" components, the values MUST BE identical to what is sent in the "GET-CAPABILITY" reply from the CUA or CS. The CUA and CS PRODID values may differ from each other. QUERY-LEVEL 1 Indicates level of SQL support. The default is CAL-QL-1 and CAL-QL-NONE can be supplied. (CAL-QL-NONE is for CS's that allow ITIP methods only to be deposited and nothing else). The default value is CAL-QL-1. RECUR-ACCEPTED 1 Whether recurrence rules are acceptable. TRUE (default) or FALSE. RECUR-EXPAND 1 Whether or not it supports the expansion of recurrence rules. TRUE (default) or FALSE. RECUR-LIMIT 1 The maximum number of occurrences of a recurrence rule that are expanded. The default of Zero (0) means unlimited. VERSION 1 Versions of iCalendar support. MUST BE at least "2.0" (the default). This is the same property as defined in [iCAL]. RECUR-ACCEPTED 1 Whether recurrence rules are acceptable. The default is TRUE. X-... 0+ May include zero or more experimental properties. These have no default and if need to be sent by an implementation, then all of the above MUST BE sent. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 107] Internet-Draft Calendar Access Protocol (CAP) November 2002 ------------------------------------------------------- Example: I: Content-Type: text/calendar I: I: BEGIN:VCALENDAR I: VERSION:2.0 I: PRODID:-//someone's prodid I: CMD;ID=unique-per-cua-125:GET-CAPABILITY I: END:VCALENDAR L: Content-Type: text/calendar L: L: BEGIN:VCALENDAR L: VERSION:2.0 L: PRODID:-//someone's prodid L: CMD;ID=unique-per-cua-125:REPLY L: BEGIN:VREPLY L: CAP-VERSION:1.0 L: PRODID:The CS prodid L: QUERY-LEVEL:CAL-QL-1 L: CAR-LEVEL:CAR-FULL-1 L: DATE-MAX:99991231T235959Z L: DATE-MIN:00000101T000000Z L: MAX-COMPONENT-SIZE:0 L: COMPONENTS:VCALENDAR,VTODO,VJOURNAL,VEVENT,VCAR, L: VALARM,VFREEBUSY,VTIMEZONE,STANDARD,DAYLIGHT,VREPLY L: ITIP-VERSION:2447 L: RECUR-ACCEPTED:TRUE L: RECUR-EXPAND:TRUE L: RECUR-LIMIT:0 L: STORES-EXPANDED:FALSE L: X-INET-PRIVATE-COMMANDS:1.0 L: END:VREPLY L: END:VCALENDAR 10.4 IDENTIFY Command CMD: IDENTIFY Purpose: The "IDENTIFY" command allows the CUA to set a new identity to be used for calendar access. A CUA MAY send an "IDENTIFY" command to a CS. The "IDENTIFY" command MUST BE implemented by all CSs. A CS implementation MAY reject all Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 108] Internet-Draft Calendar Access Protocol (CAP) November 2002 "IDENTIFY" commands. The CS MUST NOT send a "IDENTIFY" command to any CUA. Formal Definition: A "IDENTIFY" command is defined by the following notation: identify-cmd = identifyparam ":" "IDENTIFY" identifyparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ; The value is the UPN of the requested ; identity. If not supplied it is a request ; to return to the original authenticated identity. / option-param upn ) Response: "REQUEST-STATUS" with only one of the following request-status codes: 2.0 Successful. 6.4 Identity not permitted. VCAR restriction. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 109] Internet-Draft Calendar Access Protocol (CAP) November 2002 The CS determines through an internal mechanism if the credentials supplied at authentication permit the operation as the selected identity. If they do, the session assumes the new identity, otherwise a security error is returned. Example: C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD;ID=unique-per-cua-999;OPTIONS=newUserId:IDENTIFY C: END:VCALENDAR S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: REQUEST-STATUS:2.0;Request Approved S: END:VCALENDAR Or if denied: S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: PRODID:-//someone's prodid S: VERSION:2.0 S: REQUEST-STATUS:6.4;Request Denied S: END:VCALENDAR And for the CUA to return to its original authenticated identity the OPTIONS parameter is omitted: C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD;ID=unique-per-cua-995:IDENTIFY C: END:VCALENDAR The CS may accept (2.0) or deny (6.4) the request to return to the original identity. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 110] Internet-Draft Calendar Access Protocol (CAP) November 2002 If a CS considers the "IDENTIFY" command an attempt to violate security, the CS MAY terminate the BEEP session without any further notice to the CUA after sending the "REQUEST-STATUS" 6.4 reply. 10.5 MODIFY Command CMD: MODIFY Purpose: The "MODIFY" command is used to modify existing components. A CUA MAY send a "MODIFY" command to a CS. The "MODIFY" command MUST BE implemented by all CSs. The CS MUST NOT send a "MODIFY" command to any CUA. Formal Definition: A "MODIFY" command is defined by the following notation: modify-cmd = modifyparam ":" "MODIFY" modifyparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) The "MODIFY" command is used to modify existing components. The TARGET property specifies the calendars where the components exist that are going to be modified. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 111] Internet-Draft Calendar Access Protocol (CAP) November 2002 The format of the request is two components inside of "VCALENDAR" component: BEGIN:VCALENDAR ... BEGIN:VQUERY ... END:VQUERY BEGIN:XXX ...old-values... END:XXX BEGIN:XXX ...new-values... END:XXX END:CALENDAR The "VQUERY" component selects the components that are to be modified. Where "XXX" above is a named component type (VEVENT, VTODO, ...). Both the old and new components MUST BE of the same type. The old-values is a component and the contents of that component are going to change and may contain information that helps uniquely identify the original component (SEQUENCE in the example below). If the CS can not find a component that matches the QUERY and does not have at least all of the OLD-VALUES, then a 6.1 error is returned. The new-values is a component of the same type as old-values and new- values contains the new data for each selected component. Any data that is in old-values and not in new-values is deleted from the selected component. Any values in new-values that was not in old- values is added to the component. In this example the "VEVENT" component with a "UID" property value of 'unique-58' has; the "LOCATION" property and "LAST-MODIFIED" property changed, the "VALARM" component with the "SEQUENCE" property with a value of "3" has its "TRIGGER" property disabled, the "X-LOCAL" property is removed from the "VEVENT" component, and a "COMMENT" property is added. Because "SEQUENCE" property is used to locate the "VALARM" component in this example, both the old-values and the new-values contain the "SEQUENCE" property with a value of "3" and if the "SEQUENCE" property were to be left out of new-values, it would have been deleted. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 112] Internet-Draft Calendar Access Protocol (CAP) November 2002 Example: C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: TARGET:my-cal C: CMD:ID=unique-mod:MODIFY C: BEGIN:VQUERY <- Query to select data set. C: QUERY:SELECT * FROM VEVENT WHERE UID = 'unique-58' C: END:VQUERY C: BEGIN:VEVENT <- Start of old data. C: LOCATION:building 3 C: LAST-MODIFIED:20020101T123456Z C: X-LOCAL:some private stuff C: BEGIN:VALARM C: SEQUENCE:3 C: TRIGGER;RELATED=END:PT5M C: END:VALARM C: END:VEVENT C: BEGIN:VEVENT <- End of new data. C: LOCATION:building 4 C: LAST-MODIFIED:20020202T010203Z C: COMMENT:Ignore global trigger. C: BEGIN:VALARM C: SEQUENCE:3 C: TRIGGER;ENABLE=FALSE:RELATED=END:PT5M C: END:VALARM C: END:VEVENT The "X-LOCAL" property was not supplied in the new-values, so it was deleted. The "LOCATION" property value was altered, as was the "LAST-MODIFIED" value. The "VALARM" component with a "SEQUENCE" property value of "3" had its "TRIGGER" property disabled, and the "SEQUENCE" property value did not change so it was not effected. The "COMMENT" property was added. When it comes to inline ATTACHMENTs, the CUA only needs to uniquely identify the contents of the ATTACHMENT value in the old-values in order to delete them. When the CS compares the attachment data it is compared in its binary form. The ATTACHMENT value supplied by the CUA MUST BE valid encoded information. For example, to delete the same huge inline attachment from every VEVENT in 'my-cal' that has an "ATTACH" property value with the old- values: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 113] Internet-Draft Calendar Access Protocol (CAP) November 2002 BEGIN:VCALENDAR VERSION:2.0 PRODID:-//someone's prodid TARGET:my-cal CMD:MODIFY BEGIN:VQUERY QUERY:SELECT ATTACH FROM VEVENT END:VQUERY BEGIN:VEVENT ATTACH;FMTTYPE=image/basic;ENCODING=BASE64;VALUE=BINARY: MIICajCCAdOgAwIBAgICBEUwDQYJKoZIhvcNAQEEBQAwdzELMAkGA1U EBhMCVVMxLDAqBgNVBAoTI05ldHNjYXBlIENvbW11bmljYXRpb25zIE ...< remainder of attachment data NOT supplied >.... END:VEVENT BEGIN:VEVENT END:VEVENT END:VCALENDAR Above the new-values is empty, so everything in the old-values is deleted. Furthermore, the following additional restrictions apply: 1. One can not change the "UID" property of a component. 2. If a contained component is changed inside of a selected component, and that contained component has multiple instances, then old-values MUST contain information that uniquely identifies the instance or instances that are changing. It is valid to change more than one. As all contained components that match old-values will be modified. In the first modify example above, if "SEQUENCE" properties were to be deleted from both the old- values and new-values, then all "TRIGGER" properties that matched the old-values in all "VALARM" components in the selected "VEVENT" components would be disabled. 3. The result of the modify MUST BE a valid iCalendar object. Response: A "VCALENDAR" component is returns with one ore more "REQUEST-STATUS" property values. If any error occurred: No component will be changed at all. That is, it will appear just as it was prior to the modify and the CAP server SHOULD return a "REQUEST-STATUS" property for each error that occurred. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 114] Internet-Draft Calendar Access Protocol (CAP) November 2002 There MUST BE at least one error reported. If multiple components are selected, then what uniquely identified the component MUST BE returned (UID, QUERYID, ...) if the component contains a unique identifier. If not, sufficient information to uniquely identify the modified components MUST BE returned in the reply. S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: TARGET:relcalid S: CMD;ID=delete#1:REPLY S: BEGIN:VREPLY S: BEGIN:VEVENT S: UID:123 S: REQUEST-STATUS:2.0 S: END:VEVENT S: END:VREPLY S: END:VCALENDAR 10.6 MOVE Command CMD: MOVE Purpose: The "MOVE" command is used to move components within the CS. A CUA MAY send a "MOVE" command to a CS. The "MOVE" command MUST BE implemented by all CSs. The CS MUST NOT send a "MOVE" command to any CUA. Formal Definition: A "MOVE" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 115] Internet-Draft Calendar Access Protocol (CAP) November 2002 move-cmd = moveparam ":" "MOVE" moveparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) Response: The REQUEST-STATUS in a VCALENDAR object. The content of each "result" is subject to the result restriction table defined below. The access control on the "VAGENDA" component after it has been moved to its new location in the calstore MUST BE at least as secure as it was prior to the move. If the CS is not able to ensure the same level of security, a permission denied "REQUEST-STATUS" property value MUST BE returned and the "MOVE" command not performed. The "TARGET" property value specifies the new location, and the "VQUERY" component specifies the old location. Restriction Table for the "REPLY" command of any "MOVE" command. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 116] Internet-Draft Calendar Access Protocol (CAP) November 2002 move-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops 1*(move-vreply) "END" ":" "VCALENDAR" CRLF move-vreply = "BEGIN" ":" "VREPLY" CRLF move-id request-status "END" ":" "VREPLY" CRLF ; Where the id is appropriate for the ; type of object moved: ; ; VAGENDA = calid ; VCAR = carid ; VEVENT, VFREEBUSY, VJOURNAL, VTODO = uid ; VQUERY = queryid ; ALARM = sequence ; x-component = x-id ; move-id = ( calid / carid / uid / uid dtstamp / queryid / tzid / sequence / x-id) Example: moving the VAGENDA Nellis to Area-51 Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 117] Internet-Draft Calendar Access Protocol (CAP) November 2002 C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD:MOVE C: TARGET:Area-51 C: BEGIN:VQUERY C: QUERY: SELECT * FROM VAGENDA WHERE CALID='Nellis' C: END:VQUERY C: END:VCALENDAR S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: TARGET:Area-51 S: BEGIN:VREPLY S: CALID:Nellis S: REQUEST-STATUS: 2.0 S: END:VREPLY S: END:VCALENDAR 10.7 REPLY Response to a Command CMD: REPLY Purpose: The "REPLY" value to the "CMD" property is used to return the results of all other commands to the CUA. A CUA MUST send a "REPLY" command to a CS for any command a CS MAY send to the CUA. The "REPLY" command MUST BE implemented by all CUAs that support getting the "GET-CAPABILITY" command. A CS MUST send a "REPLY" command to a CUA for any command a CUA MAY send to the CS. The "REPLY" command MUST BE implemented by all CSs. Formal Definition: A "REPLY" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 118] Internet-Draft Calendar Access Protocol (CAP) November 2002 reply-cmd = replyparam ":" "REPLY" replyparam = *( ; The 'id' parameter value MUST BE exactly the ; same as the value sent in the original ; CMD property. If the original CMD did ; not have an 'id' parameter, then the 'id' ; MUST NOT be supplied in the REPLY. id-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) 10.8 SEARCH Command CMD: SEARCH Purpose: The "SEARCH" command is used to return selected components to the CUA. A CUA MAY send a "SEARCH" command to a CS. The "SEARCH" command MUST BE implemented by all CSs. The CS MUST NOT send a "SEARCH" command to any CUA. Formal Definition: A "SEARCH" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 119] Internet-Draft Calendar Access Protocol (CAP) November 2002 search-cmd = searchparam ":" "SEARCH" searchparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) ) Response: The data in each result contains an iCalendar object composed of all the selected components enclosed in a "VREPLY" component. Only "REQUEST-STATUS" property and the properties mentioned in the "SELECT" clause of the QUERY are included in the components. Each iCalendar object is tagged with the "TARGET" property. Searching for objects In the example below objects on March 10,1999 between 080000Z and 190000Z are read. In this case only 4 properties for each objects are returned. Two calendars are specified. Only booked (vs scheduled) entries are to be returned (this example only selected VEVENT objects): Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 120] Internet-Draft Calendar Access Protocol (CAP) November 2002 C: Content-Type: text/calendar C: C: BEGIN:VCALENDAR C: VERSION:2.0 C: PRODID:-//someone's prodid C: CMD:SEARCH C: TARGET:relcal2 C: TARGET:relcal3 C: BEGIN:VQUERY C: QUERY:SELECT DTSTART,DTEND,SUMMARY,UID C: FROM VEVENT C: WHERE DTEND >= '19990310T080000Z' C: AND DTSTART <= '19990310T190000Z' C: AND STATE() = 'BOOKED' C: END:VQUERY C: END:VCALENDAR The return values are subject to VCAR filtering. That is, if the request contains properties to which the UPN does not have access, those properties will not appear in the return values. If the UPN has access to at least one property of the component, but has been denied access to all properties called out in the request, the response will contain a single "REQUEST-STATUS" property indicating the error. Here the request was successful, but the "VEVENT" component contents were not accessible (4.1). S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: TARGET:relcalid S: CMD:REPLY S: VERSION:2.0 S: PRODID:-//someone's prodid S: BEGIN:VREPLY S: BEGIN:VEVENT S: REQUEST-STATUS:4.1 S: END:VEVENT S: END:VREPLY S: END:VCALENDAR If the UPN has no access to any components at all, the response will simply be an empty data set. The response looks the same if there the particular components did not exist. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 121] Internet-Draft Calendar Access Protocol (CAP) November 2002 S: Content-Type: text/calendar S: S: BEGIN:VCALENDAR S: VERSION:2.0 S: PRODID:-//someone's prodid S: CMD:REPLY S: TARGET:ralcalid S: BEGIN:VREPLY S: REQUEST-STATUS:2.0 S: END:VREPLY S: END:VCALENDAR If there are multiple targets, each iCalendar reply is contained within its own iCalendar object. Stored VQUERY can be used by specifying the property QUERYID instead of QUERY. 10.9 SET-LOCALE Command CMD: SET-LOCALE Purpose: The "SET-LOCALE" command is used to select the locale that will be used in error codes used int the "REQUEST-STATUS" property. It also effect the locale sorting order for queries. A CUA MAY send a "SET-LOCALE" command to a CS. The SET-LOCALE command MUST BE implemented by all CSs. The CS MUST NOT send a "SET-LOCALE" command to any CUA. Formal Definition: A "SET-LOCALE" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 122] Internet-Draft Calendar Access Protocol (CAP) November 2002 setlocale-cmd = searchparam ":" "SET-LOCALE" setlocaleparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / latency-param / setlocale-option ; the following MUST occur exactly once and only ; when the latency-param has been supplied and ; MUST NOT be supplied if the latency-param is ; not supplied. / action-param ; the following is optional, ; and MAY occur more than once / (";" xparam) setlocal-option = option-param newlocale newlocale = ; Any locale supplied in the initial BEEP ; "greeting" "localize" parameter and ; and any charset supported by the CS ; and listed in the DEFAULT-CHARSET property ; of the VCALSTORE. ) Restriction Table for the "REPLY" command of any "SET-LOCALE" command. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 123] Internet-Draft Calendar Access Protocol (CAP) November 2002 setlocale-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops 1*(setlocale-vreply) "END" ":" "VCALENDAR" CRLF setlocale-vreply = "BEGIN" ":" "VREPLY" CRLF request-status "END" ":" "VREPLY" CRLF 10.10 TIMEOUT Command CMD: TIMEOUT Purpose: The "TIMEOUT" command is only sent after a command has been sent with a latency value set. When received it means the command could not be completed in the time allowed. Formal Definition: A "CONTINUE" command is defined by the following notation: Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 124] Internet-Draft Calendar Access Protocol (CAP) November 2002 continue-cmd = continueparam ":" "CONTINUE" continueparam = *( ; the following are optional, ; but MUST NOT occur more than once id-param / localize-param / (";" xparam) ) The REPLY of any "TIMEOUT" command is: timeout-reply = "BEGIN" ":" "VCALENDAR" CRLF calprops timeout-vreply "END" ":" "VCALENDAR" CRLF timeout-vreply = "BEGIN" ":" "VREPLY" CRLF request-status *(x-prop) "END" ":" "VREPLY" CRLF 10.11 Response Codes Numeric response codes are returned using the "REQUEST-STATUS" property. The format of these codes is described in [iCAL], and extend in [iTIP] and [iMIP]. The following describes new codes added to this set and how existing codes apply to CAP. At the application layer response codes are returned as the value of a "REQUEST-STATUS" property. The value type of this property is modified from that defined in [iCAL], in order to make the accompanying "REQUEST-STATUS" property text optional. Code Description -------------------------------------------------------------- 2.0 Success. The parameters vary with the operation and are specified. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 125] Internet-Draft Calendar Access Protocol (CAP) November 2002 2.0.3 In response to the client issuing an "abort" reply, this reply code indicates that any command currently underway was successfully aborted. 3.1.4 Capability not supported. 4.1 Calendar store access denied. 6.1 Container not found. 6.2 Attempt to create or modify an object such that it would overlap another object in either of the following two circumstances: (a) One of the objects has a TRANSP property set to OPAQUE-NOCONFLICT or TRANSPARENT-NOCONFLICT. (b) The calendar's ALLOW-CONFLICT property is set to FALSE. 6.3 Bad args. 6.4 Permission denied - VCAR restriction. A VCAR exists and the CS will not perform the operation. 7.0 A timeout has occurred. The server was unable to complete the operation in the requested time. 8.0 A failure has occurred in the Calendar Server that prevents the operation from succeeding. 8.1 A query was performed and the query is too complex for the CS. The operation was not performed. 8.2 Used to signal that an iCalendar object has exceeded the server's size limit 8.3 A DATETIME value was too far in the future represented on this Calendar. 8.4 A DATETIME value was too far in the past to be represented on this Calendar. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 126] Internet-Draft Calendar Access Protocol (CAP) November 2002 8.5 An attempt was made to create a new object but the unique UID specified is already in use. 9.0 An unrecognized command was received. Or an unsupported command was received. 10.4 The operation has not been performed because it would cause the resources (memory, disk, CPU, etc) to exceed the allocated quota. -------------------------------------------------------------- Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 127] Internet-Draft Calendar Access Protocol (CAP) November 2002 11. Object Registration This section provides the process for registration of new or modified properties, parameters, commands, or other modifications, additions, or deletions to objects. 11.1 Registration of New and Modified Entities New objects are registered by the publication of an IETF Request for Comment (RFC). Changes to a objects are registered by the publication of a revision to the RFC in a new RFC. 11.2 Post the item definition The object description MUST BE posted to the new object discussion list: ietf-calendar@imc.org. 11.3 Allow a comment period Discussion on a new object MUST BE allowed to take place on the list for a minimum of two weeks. Consensus MUST BE reached on the object before proceeding to the next step. 11.4 Release a new RFC The new object will be submitted for publication as any other internet draft requesting RFC status. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 128] Internet-Draft Calendar Access Protocol (CAP) November 2002 12. BEEP and CAP 12.1 BEEP Profile Registration TBD 12.2 BEEP Exchange Styles [BEEP] defines three styles of message exchange: MSG/ANS,ANS,...,NUL - For one to many exchanges. MSG/RPY - For one to one exchanges. MSG/ERR - For requests the cannot be processed due to an error. A CAP request, targeted at more than one containers, MAY use a one- to-many exchange, with a distinct answer associated with each target. CAP request targeted at a single container MAY use a one-to-one exchange or a one-to-many exchange. "MSG/ERR" MAY only be used when an error condition prevents the execution of the request on all the targeted calendars. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 129] Internet-Draft Calendar Access Protocol (CAP) November 2002 13. IANA Considerations This memo defines IANA registered extensions to the attributes defined by iCalendar, as defined in [iCAL], and [iTIP]. IANA registration proposals for iCalendar and [iTIP] are to be mailed to the registration agent for the "text/calendar" [MIME] content- type, using the format defined in section 7 of [iCAL]. If the IESG approves this memo for publication, then the IANA registers the profile specified in Section 12.1, and selects an IANA- specific URI, e.g., http://iana.org/beep/cap/1.0. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 130] Internet-Draft Calendar Access Protocol (CAP) November 2002 14. Security Considerations Access rights should be granted cautiously, consult Section 2.4.2 for a discussion of the subject. Without careful planning it is possible to open up access to a greater degree than desired. The "IDENTIFY" command should be carefully implemented as discussed in Section 6.1.3. In addition, since CAP is a profile of the BEEP, consult [BEEP]'s Section 9 for a discussion of BEEP-specific security issues. Although service provisioning is a policy matter, at a minimum, all implementations must provide the following tuning profiles: for authentication: http://iana.org/beep/SASL/DIGEST-MD5 for confidentiality: http://iana.org/beep/TLS (using the TLS_RSA_WITH_3DES_EDE_CBC_SHA cipher) for both: http://iana.org/beep/TLS (using the TLS_RSA_WITH_3DES_EDE_CBC_SHA cipher supporting client-side certificates) Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 131] Internet-Draft Calendar Access Protocol (CAP) November 2002 URIs [1] Authors' Addresses Doug Royer INET-Consulting.com 1795 W. Broadway #266 Idaho Falls, ID 83402 US Phone: +1-866-594-8574 Fax: +1-866-594-8574 EMail: Doug@Royer.com URI: http://INET-Consulting.com George Babics Oracle 2000 Peel Street Montreal, Quebec H3A 2W5 CA Phone: +1-514-733-8500 x4201 Fax: +1-514-733-8878 EMail: George.Babics@Oracle.com Paul Hill Massachusetts Institute of Technology W92-172 77 Massachusetts Avenue Cambridge, MA 02139 US Phone: +1-617-253-0124 Fax: +1-617-258-8736 EMail: phb@mit.edu Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 132] Internet-Draft Calendar Access Protocol (CAP) November 2002 Steve Mansour AOL/Netscape 466 Ellis Road Mountain View, CA 94043 US Phone: +1-650-937-3351 EMail: sman@netscape.com Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 133] Internet-Draft Calendar Access Protocol (CAP) November 2002 Appendix A. Acknowledgments The following have individuals were major contributors in the drafting and discussion of this memo: Harald Alvestrand, Christopher Apple, G. Barnes, ArentJan Banck, Martijn van Beers, Mario Bonin, Andrea Campi, Darryl Champagne, Damon Chaplin, Karen Chu, Shannon Clark, Andre Courtemanche, Dave Crocker, Alan Davies, Andrew Davison, Mark Davidson, Bernard Desruisseaux, Frank Dawson, Pat Egen, Greg FitzPatrick, illes Fortin, Ned Freed, Gary Frederick, Jagan Garimella, Graham Gilmore, Micah Gorrell, Lawrence Greenfield, Bertrand Guiheneuf, Olivier Gutknecht, Mike Hixson, Jeff Hodges, Paul Hoffman, Scott Hollenbeck, Alex Hoppman, Bruce Kahn, Lata Kannan, suchet singh khalsa, Dan Kohn, Patrice Lapierre, Jonathan Lennox, Lisa Lippert, Robert Lusardi, David Madeo, Bob Mahoney, Murata Makoto, Gary McGath, Libby Miller, Steve Miller, Bob Morgan, David Nicol, David Nusbaum, Pete O'Leary, Mark Paterson, Ralph Patterson, Eric R. Plamondon, Robert Ransdell, Jim Ray, Marshall Rose, JP Rosevear, Paul Sharpe, Richard Shusterman, Tony Small, John Smith, Benjamin Sonntag, John Stracke, Alexander Taler, Peter Thompson, Steve Vinter, Mark Wahl, Dan Winship Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 134] Internet-Draft Calendar Access Protocol (CAP) November 2002 Appendix B. Bibliography [BEEP] Rose, M., "The Block Extensible Exchange Protocol Core", RFC 3080, March 2001 ftp://ftp.isi.edu/in-notes/rfc3080.txt [BEEPTCP] Rose, M., "Mapping the BEEP Core onto TCP", RFC 3081, March 2001 ftp://ftp.isi.edu/in-notes/rfc3081.txt [CHARREG] Freed, N., Postel, J., "IANA Charset Registration Procedures", RFC 2278, January 1998, ftp://ftp.isi.edu/in-notes/rfc2278.txt [CHARPOL] Alvestrand, H., "IETF Policy on Character Sets and Languages", RFC 2277, January 1998, ftp://ftp.isi.edu/in-notes/rfc2277.txt [GUIDE] Mahoney, B., Babics, G., Taler, A. "Guide to Internet Calendaring", RFC 3283, June 2002, ftp://ftp.isi.edu/in-notes/rfc3283.txt [iCAL] Dawson, F. and Stenerson, D., "Internet Calendaring and Scheduling Core Object Specification (iCalendar)", RFC 2445, November 1998 ftp://ftp.isi.edu/in-notes/rfc2245.txt [iTIP] Silverberg, S., Mansour, S., Dawson, F. and Hopson, R., "iCalendar Transport-Independent Interoperability Protocol (iTIP) Events, BusyTime, To-dos and Journal Entries", RFC 2446, November 1998 ftp://ftp.isi.edu/in-notes/rfc2446.txt [iMIP] Dawson, F., Mansour, S. and Silverberg, "iCalendar Message-Based Interoperability Protocol (iMIP)", RFC 2447, November 1998 ftp://ftp.isi.edu/in-notes/rfc2447.txt [MIME] Borenstein, N. and Freed, N., "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies", RFC 2045, November 1996 ftp://ftp.isi.edu/in-notes/rfc2045.txt [RFCWORDS] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, BCP 14, March 1997 ftp://ftp.isi.edu/in-notes/rfc2119.txt [SASL] Myers, J., "Simple Authentication and Security Layer (SASL)", RFC 2222, October 1997 ftp://ftp.isi.edu/in-notes/rfc2222.txt Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 135] Internet-Draft Calendar Access Protocol (CAP) November 2002 [SQL92] "Database Language SQL", ANSI/ISO/IEC 9075: 1992, aka ANSI X3.135-1992, aka FiPS PUB 127-2 [SQLCOM] ANSI/ISO/IEC 9075:1992/TC-1-1995, Technical corrigendum 1 to ISO/IEC 9075: 1992, also adopted as Amendment 1 to ANSI X3.135.1992 [URLGUIDE] Masinter, L., Alvestrand, H., Zigmond, D., Petke, R., "Guidelines for new URL Schemes", RFC 2718, November 1999, ftp://ftp.isi.edu/in-notes/rfc2718.txt [URI] Berners-Lee, T., Fielding, R. and Masinter, L., "Uniform Resource Identifiers (URI): Generic Syntax", RFC 2396, August 1998 ftp://ftp.isi.edu/in-notes/rfc2396.txt [URL] Berners-Lee, T, Masinter, L. and McCahil, M., "Uniform Resource Locators (URL)", RFC 1738, December 1994 ftp://ftp.isi.edu/in-notes/rfc1738.txt [X509CRL] Housley, R., Ford, W., Polk, W., Solo, D. "Internet X.509 Public Key Infrastructure, Certificate and CRL Profile", RFC 2459, January 1999, ftp://ftp.isi.edu/in-notes/rfc2459.txt Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 136] Internet-Draft Calendar Access Protocol (CAP) November 2002 Full Copyright Statement Copyright (C) The Internet Society (2002). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Royer, Babics, Hill, Mansour Expires May 4, 2003 [Page 137]