VCARDDAV G. Salgueiro Internet-Draft J. Clarke Intended status: Standards Track P. Saint-Andre Expires: July 9, 2012 Cisco Systems January 6, 2012 vCard KIND:device draft-salgueiro-vcarddav-kind-device-00 Abstract This document defines a value of "device" for the vCard KIND property so that the vCard format can be used to represent computing devices such as appliances, computers, or network elements (e.g., a server, router, switch, printer, sensor, or phone). Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. 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." This Internet-Draft will expire on July 9, 2012. Copyright Notice Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Salgueiro, et al. Expires July 9, 2012 [Page 1] Internet-Draft vCard KIND:device January 2012 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions Used in This Document . . . . . . . . . . . . . . . 3 3. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 6. Security Considerations . . . . . . . . . . . . . . . . . . . . 7 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.1. Normative References . . . . . . . . . . . . . . . . . . . 7 7.2. Informative References . . . . . . . . . . . . . . . . . . 7 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 8 Salgueiro, et al. Expires July 9, 2012 [Page 2] Internet-Draft vCard KIND:device January 2012 1. Introduction Version 4 of the vCard specification [RFC6350] defines a new "KIND" property to specify the type of entity that a vCard represents. During its work on the base vCard4 specification, the VCARDDAV Working Group defined values of "individual", "organization", "group", and "location" for the KIND property. Additionally, [RFC6473] has defined a value of "application" for the KIND property to represent software applications. During working group discussion of the document that became [RFC6473], consideration was given to defining a more general value of "thing", but it was decided to split "thing" into software applications and hardware devices and to define only the "application" value at that time. Since then, use cases for device vCards have emerged. Therefore, this document complements [RFC6473] by defining a value of "device" for the KIND property to represent computing devices such as appliances, computers, or network elements. In this context, the concept of a device is constrained to computing devices and thus is distinct from purely mechanical devices such as elevators, electric generators, etc. that cannot communicate in any way over a network. 2. Conventions Used in This Document 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 RFC 2119 [RFC2119]. "SHOULD", "SHOULD NOT", "RECOMMENDED", and "NOT RECOMMENDED" are appropriate when valid exceptions to a general requirement are known to exist or appear to exist, and it is infeasible or impractical to enumerate all of them. However, they should not be interpreted as permitting implementors to fail to implement the general requirement when such failure would result in interoperability failure. 3. Scope When the KIND property has a value of "device", the vCard represents a computing device such as an appliance, a computer, or a network element (e.g., a server, router, switch, printer, sensor, or phone). More formally, a "device" is functionally equivalent to the "device" object class used in the Lightweight Directory Access Protocol [RFC4519] as derived from the Open Systems Interconnection model [X.521] [X.200]. However, whereas [X.521] specifies that devices are "physical" elements, a device in this context can also be virtual Salgueiro, et al. Expires July 9, 2012 [Page 3] Internet-Draft vCard KIND:device January 2012 such as a virtual machine running within another physical element. As one example of the "device" KIND, vCards can be embedded into devices at manufacturing time such that basic information such as serial number, support email, and documentation URL can be retrieved upon initial deployment. This vCard can be modified after the device is deployed to contain user-specified data about the device's characteristics. The vCard data can therefore be used for both asset tracking and operational purposes. The properties included in a device's vCard apply to one of the following: o The device itself (e.g., the FN property might represent the hostname of a computing device, the URL property might represent a website that contains details on where to find documentation or get further information about the device, the KEY property might represent a digital certificate that was provisioned into the device at the time of manufacture [IEEE.802.1AR], or a public key certificate previously provisioned into the device, and the ADR, GEO, and TZ properties might represent the physical address, geographical location, and timezone where the device is deployed). o An organization or person that produces or manufactures the device (e.g., the LOGO property might represent the corporate logo of an equipment vendor, and the URL might represent the website where the device's installation and maintenance documentation is available). o A person or role that maintains or administers the device (e.g., the TEL, EMAIL, and IMPP properties might represent ways to contact a server or network administrator). When a property represents some aspect of the device itself, the TYPE parameter MUST NOT include the values "work" and "home" (see the definition of the TYPE parameter in Section 5.6 of [RFC6350]). When a property represents information about an individual associated with the device (e.g., an individual device administrator as opposed to a device attribute or an associated organization), TYPE values "home" and "work" MAY be specified. Whatever TYPE values are used, the implementation MUST distinguish attributes that are applicable to individuals related to the device as opposed to those attributes applicable to the device itself. The following base properties make sense for vCards that represent devices (this list is not exhaustive, and other properties might be applicable as well): Salgueiro, et al. Expires July 9, 2012 [Page 4] Internet-Draft vCard KIND:device January 2012 * ADR * EMAIL * FN * GEO * IMPP * KEY * KIND * LANG * LOGO * NOTE * ORG * PHOTO * REV * SOURCE * TEL * TZ * UID * URL Although it might be desirable to define a more fine-grained taxonomy of devices (e.g., a KIND of "device" with a subtype of "router" or "computer"), such a taxonomy is out of scope for this document. 4. Example The following is an example of a router device that contains both manufacturing details (e.g., the UID is a serial number) as well as post-deployment attributes and uses the XML representation of vCard described in [RFC6351]. Salgueiro, et al. Expires July 9, 2012 [Page 5] Internet-Draft vCard KIND:device January 2012 device x-model-name RTR1001 core-rtr-1.example.net http://www.example.com/support/index.html support@example.com x-local-support network-support@example.net xmpp:core-rtr-1@example.net http://www.example.com/images/logo.png geo:35.82,-78.64 America/New_York 20120104T213000Z FTX1234ABCD x-contract-number 1234567 00-00-5E-00-00-01 2.1.5 5. IANA Considerations The IANA is requested to add "device" to the registry of property values for vCard4. In conformance with Section 10.2.6 of [RFC6350], the registration is as follows, where the reference is to RFCXXXX. Salgueiro, et al. Expires July 9, 2012 [Page 6] Internet-Draft vCard KIND:device January 2012 Value: device Purpose: The entity represented by the vCard is a computing device such as an appliance, computer, or network element. Conformance: This value can be used with the "KIND" property. Example: See Section 3 of RFCXXXX. [[NOTE TO RFC EDITOR: Please change XXXX to the number assigned to this specification, and remove this paragraph on publication.]] 6. Security Considerations Use of vCards to represent devices is not envisioned to introduce security considerations beyond those specified for vCards in general as described in [RFC6350]. 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC6350] Perreault, S., "vCard Format Specification", RFC 6350, August 2011. 7.2. Informative References [IEEE.802.1AR] Institute of Electrical and Electronics Engineers, "Secure Device Identity", IEEE 802.1AR, 2009. [RFC4519] Sciberras, A., "Lightweight Directory Access Protocol (LDAP): Schema for User Applications", RFC 4519, June 2006. [RFC6351] Perreault, S., "xCard: vCard XML Representation", RFC 6351, August 2011. [RFC6473] Saint-Andre, P., "vCard KIND:application", RFC 6473, December 2011. [X.200] International Telecommunications Union, "Information Technology - Open Systems Interconnection - Basic Salgueiro, et al. Expires July 9, 2012 [Page 7] Internet-Draft vCard KIND:device January 2012 Reference Model: The Basic Model", ITU-T Recommendation X.521, ISO Standard 9594-7, February 2001. [X.521] International Telecommunications Union, "Information Technology - Open Systems Interconnection - The Directory: Selected Object Classes", ITU-T Recommendation X.200, ISO Standard 7498-1, July 1994. Authors' Addresses Gonzalo Salgueiro Cisco Systems 7200-12 Kit Creek Road Research Triangle Park, NC 27709 US Phone: +1-919-392-3266 Email: gsalguei@cisco.com Joe Clarke Cisco Systems 7200-12 Kit Creek Road Research Triangle Park, NC 27709 US Phone: +1-919-392-2867 Email: jclarke@cisco.com Peter Saint-Andre Cisco Systems 1899 Wynkoop Street, Suite 600 Denver, CO 80202 USA Phone: +1-303-308-3282 Email: psaintan@cisco.com Salgueiro, et al. Expires July 9, 2012 [Page 8]