{
  "draft": "draft-ietf-simple-filter-format-05",
  "doc_id": "RFC4661",
  "title": "An Extensible Markup Language (XML)-Based Format for Event Notification Filtering",
  "authors": [
    "H. Khartabil",
    "E. Leppanen",
    "M. Lonnfors",
    "J. Costa-Requena"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "24",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "SIP for Instant Messaging and Presence Leveraging Extensions",
  "abstract": "The SIP event notification framework describes the usage of the Session Initiation Protocol (SIP) for subscriptions and notifications of changes to a state of a resource.  The document does not describe a mechanism whereby filtering of event notification information can be achieved.  Filtering is a mechanism for defining the preferred notification information to be delivered and for specifying triggers that cause that information to be delivered.  In order to enable this, a format is needed to enable the subscriber to describe the state changes of a resource that cause notifications to be sent to it and what those notifications are to contain.  This document presents a format in the form of an XML document. [STANDARDS-TRACK]",
  "pub_date": "September 2006",
  "keywords": [
    "event state subscription",
    "presence",
    "filter criteria"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC4661",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4661"
}