RFC 3856 on A Presence Event Package for the Session Initiation Protocol (SIP)

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        RFC 3856

        Title:      A Presence Event Package for the Session
                    Initiation Protocol (SIP)
        Author(s):  J. Rosenberg
        Status:     Standards Track
        Date:       August 2004
        Mailbox:    jdrosen@dynamicsoft.com
        Pages:      27
        Characters: 62956
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-simple-presence-10.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3856.txt

This document describes the usage of the Session Initiation Protocol
(SIP) for subscriptions and notifications of presence.  Presence is
defined as the willingness and ability of a user to communicate with
other users on the network.  Historically, presence has been limited
to "on-line" and "off-line" indicators; the notion of presence here
is broader.  Subscriptions and notifications of presence are supported
by defining an event package within the general SIP event
notification framework.  This protocol is also compliant with the
Common Presence Profile (CPP) framework.

This document is a product of the SIP for Instant Messaging and
Presence Leveraging Extensions Working Group of the IETF.

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
standardization state and status of this protocol.  Distribution
of this memo is unlimited.

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Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

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