Network Working Group P. Saint-Andre
Internet-Draft Cisco
Intended status: Standards Track April 20, 2011
Expires: October 22, 2011
vCard KIND:thing
draft-saintandre-vcarddav-thing-00
Abstract
This document defines a value of "thing" for the vCard KIND property.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Meaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.1. Normative References . . . . . . . . . . . . . . . . . . . 5
6.2. Informative References . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 5
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1. Introduction
Version 4 of the vCard specification [VCARD] defines a new KIND
property that specifies the type of entity that a vCard represents.
During working group discussion of that specification, the "thing"
value of the KIND property was removed, with the expectation that the
value might be defined in a vCard extension. This document defines
such an extension.
2. Meaning
When the KIND property has a value of "thing", the vCard represents a
software application (e.g.,a server, a chatroom, or a bot) or a
physical object (e.g., a building or a machine). As one example of
the "thing" KIND, vCards are currently used in the Extensible
Messaging and Presence Protocol [XMPP] to represent instant messaging
servers that are deployed on the network.
All properties in a thing's vCard apply to one of the following:
o The thing itself (e.g., the FN property might represent the
friendly name of an application service, the URL property might
represent a website that contains further information about the
service, and the ADR, GEO, and TZ properties might represent the
physical address, geographical location, and timezone of the
machine where the service is hosted).
o An organization or person that owns the thing (e.g., the LOGO
property might represent the corporate logo of a service
provider).
o A person or role that controls the thing (e.g., the TEL, EMAIL,
and IMPP properties might represent ways to contact a server
administrator).
The following base properties make sense for vCards that represent
things (this list is not exclusive, and other properties might be
applicable as well):
o FN
o ADR
o TEL
o EMAIL
o IMPP
o LANG
o TZ
o GEO
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o LOGO
o URL
o KEY
3. Example
The following example of an XMPP server is borrowed from [XMPP-VCARD]
and uses the XML representation of vCard described in [VCARDXML].
<vcard xmlns="urn:ietf:params:xml:ns:vcard-4.0">
<vcards>
<fn><text>jabber.org IM service</text></fn>
<url><uri>http://www.jabber.org/</uri></url>
<lang>
<parameters><pref>1</pref></parameters>
<language-tag>en</language-tag>
</lang>
<email>
<parameters><type><text>work</text></type></parameters>
<text>xmpp@jabber.org</text>
</email>
<impp>
<parameters><type><text>work</text></type></parameters>
<uri>xmpp:jabber.org</uri>
</impp>
<logo>
<parameters><type><text>work</text></type></parameters>
<uri>http://www.jabber.org/images/logo.png</uri>
</logo>
<geo>
<parameters><type><text>work</text></type></parameters>
<uri>geo:42.25,-91.05</uri>
</geo>
<tz><text>America/Chicago</text></tz>
<kind><text>thing</text></kind>
</vcard>
</vcards>
4. IANA Considerations
The IANA is requested to add "thing" to the registry of property
values for vCard4. In conformance with Section 10.2.6 of [VCARD],
the registration is as follows, where the reference is to XXXX.
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Value: thing
Purpose: The object represented by the vCard is an automated entity,
such as a software application or a physical object.
Conformance: This value can be used with the "KIND" property.
Example: See Section 3 of XXXX.
5. Security Considerations
Use of vCards to represent non-human entities is not envisioned to
introduce security considerations beyond those specified for vCards
in general as described in [VCARD].
6. References
6.1. Normative References
[VCARD] Perreault, S., "vCard Format Specification",
draft-ietf-vcarddav-vcardrev-19 (work in progress),
April 2011.
6.2. Informative References
[VCARDXML]
Perreault, S., "vCard XML Representation",
draft-ietf-vcarddav-vcardxml-09 (work in progress),
April 2011.
[XMPP] Saint-Andre, P., "Extensible Messaging and Presence
Protocol (XMPP): Core", RFC 6120, March 2011.
[XMPP-VCARD]
Mizzi, S. and P. Saint-Andre, "vCard4 Over XMPP", XSF
XEP 0292, April 2011.
Author's Address
Peter Saint-Andre
Cisco
1899 Wyknoop Street, Suite 600
Denver, CO 80202
USA
Phone: +1-303-308-3282
Email: psaintan@cisco.com
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