(RFC 5262 published September 2008, subtype last updated September 2008) MIME media type name: application MIME subtype name: pidf-diff+xml Mandatory parameters: none Optional parameters: Same as charset parameter of application/xml as specified in RFC 3023 [RFC3023]. Default value is UTF-8. Encoding considerations: Same as encoding considerations of application/xml as specified in RFC 3023 [RFC3023]. Security considerations: See Section 10 of RFC 3023 [RFC3023]. This content type is designed to carry presence data, which may be considered private information. Appropriate precautions should be adopted to limit disclosure of this information. Interoperability considerations: none Published specification: RFC 5262 Applications that use this media type: SIP-based presence systems Additional information: Magic Number: None File Extension: .xml Macintosh file type code: "TEXT" Personal and email address for further information: Jari Urpalainen, jari.urpalainen&nokia.com Intended usage: LIMITED USE Restrictions on usage: Presence [RFC3863] based systems. Author: This specification is a work item of the IETF SIMPLE working group, with mailing list address . Author/Change controller: the IETF.