Internet DRAFT - draft-yevstifeyev-vcarddav-version
draft-yevstifeyev-vcarddav-version
INTERNET-DRAFT M. Yevstifeyev
Intended Status: Standards Track September 17, 2011
Expires: March 20, 2012
Registration of vCard VERSION Property Values
draft-yevstifeyev-vcarddav-version-00
Abstract
This document registers the existing vCard VERSION property values
with IANA and contains some provisions on its generic syntax and use.
Status of this Memo
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Copyright and License Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 2
2. vCard VERSION Property . . . . . . . . . . . . . . . . . . . . 2
2.1. Generic Syntax . . . . . . . . . . . . . . . . . . . . . . 2
2.2. Use of VERSION Property . . . . . . . . . . . . . . . . . . 3
2.3. Registration of VERSION Property Values . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. Normative References . . . . . . . . . . . . . . . . . . . 4
5.2. Informative References . . . . . . . . . . . . . . . . . . 4
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
vCard is used to represent and exchange a variety of information
about individuals and other entities (e.g., formatted and structured
name and delivery addresses, email address, multiple telephone
numbers, photograph, logo, audio clips, etc.). The most current
vCard specification is RFC 6350 [RFC6350], that defines version 4.0
of vCard. However, a number of other vCard versions existed prior to
publication of RFC 6350.
vCard entity is capable of carrying information about its version in
the VERSION property. The purpose of this document is to register
all existing vCard versions as VERSION property values in the
corresponding registry set up by RFC 6350. It also clarifies the
generic syntax of VERSION property and contains guidelines on its use
in vCard entities that conform to different vCard versions.
1.1. Terminology
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].
2. vCard VERSION Property
2.1. Generic Syntax
The VERSION property was first introduced in vCard 2.1 [VCARD21], and
continued to be used in vCard 3.0 [RFC2426] and vCard 4.0 [RFC6350].
Each of the aforementioned specifications defined a separate syntax
for VERSION property which is appropriate for use in vCard entities
conformant to such specification, such as (from RFC 6350; ABNF
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[RFC5234] is used):
VERSION-value = "4.0"
for VERSION property value of vCard 4.0.
This document defines a simple generic syntax for VERSION property
values, that is expressed using Augmented Backus-Naur Form (ABNF)
[RFC5234] in the <VERSION-value> production:
VERSION-value = 1*DIGIT "." DIGIT
where <DIGIT> is specified in RFC 5234 [RFC5234]. All subsequent
versions of vCard MUST define VERSION property value syntax that is
compatible with this document.
2.2. Use of VERSION Property
As VERSION property was first introduced in vCard 2.1 [VCARD21],
vCard 2.0 and vCard 1.0 did not contain such facility. However, this
document set up the rule that any vCard entity, independent of the
version, SHOULD contain VERSION property, with the value conformant
to syntax described in Section 2.1, and such property, if present,
SHOULD be put after the BEGIN property.
2.3. Registration of VERSION Property Values
Section 4 of this document registers VERSION property values for all
existing vCard versions, beginning with vCard 1.0 and ending in vCard
4.0. Specifications of further versions of vCard are supposed to
register their own version.
3. Security Considerations
This document is not believed to affect security of vCard in any way.
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4. IANA Considerations
IANA is asked to add the following entries in the vCard Property
Values registry created by RFC 6350:
+----------+--------+-------------------------+
| Property | Value | Reference |
+----------+--------+-------------------------+
| VERSION | 1.0 | [VCARD10], [RFCXXXX] |
| VERSION | 2.0 | [VCARD20], [RFCXXXX] |
| VERSION | 2.1 | [VCARD21], [RFCXXXX] |
| VERSION | 3.0 | [RFC2426], [RFCXXXX] |
| VERSION | 4.0 | [RFC6350], [RFCXXXX] |
+----------+--------+-------------------------+
5. References
5.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5234] Crocker, D., Ed., and P. Overell, "Augmented BNF for
Syntax Specifications: ABNF", STD 68, RFC 5234, January
2008.
[RFC6350] Perreault, S., "vCard Format Specification", RFC 6350,
August 2011.
5.2. Informative References
[RFC2426] Dawson, F. and T. Howes, "vCard MIME Directory Profile",
RFC 2426, September 1998.
[VCARD10] Reference unknown for the present.
[VCARD20] Versit Consortium, "The Electronic Business Card Version
2.0", Versit Consortium Specification, April 1996,
<http://freepdfhosting.com/71e0ff3870.pdf>.
Note: the link is temporary only and will be replaced soon
by another one.
[VCARD21] Versit Consortium, "The Electronic Business Card Version
2.1", Versit Consortium Specification, September 1996,
<http://www.imc.org/pdi/vcard-21.txt>.
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Appendix A. Acknowledgments
Thanks to Roland Alden for providing vCard 2.0 specification.
Authors' Addresses
Mykyta Yevstifeyev
8 Kuzovkov St., Apt. 25
Kotovsk
Ukraine
EMail: evnikita2@gmail.com
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