(per RFC5438) MIME media type: message MIME subtype name: imdn+xml Mandatory parameters: none Optional parameters: Same as charset parameter application/xml as specified in RFC 3023 [RFC3023]. Encoding considerations: Same as encoding considerations of application/xml as specified in RFC 3023 [RFC3023]. Security considerations: See Section 10 of RFC 3023 [RFC3023] and Section 14 of this document. Interoperability considerations: none Published specification: This document Applications which use this media type: This media type is used to support CPIM-based instant Messaging. Additional information: none Magic number: none File extension: .cl or .xml Macintosh file type code: "TEXT" Personal and email address for further information: Hisham Khartabil (hisham.khartabil&gmail.com) Intended Usage: COMMON Author/change controller: The IETF