(registered in 2002-01 via RFC 3236, last updated 2014-10-23) Name : Robin Berjon Email : robin&w3.org MIME media type name : Application MIME subtype name : Standards Tree - xhtml+xml Required parameters : none Optional parameters : charset: same as for application/xml [RFC7303] profile: deprecated as the notion of XHTML profiles has been obsoleted in HTML5. See section 8 of RFC 3236 for additional information about how this parameter was defined. Encoding considerations : binary Security considerations : The considerations for "text/html" as specified in http://www.w3.org/TR/html and for 'application/xml' as specified in [RFC 7303], also hold for 'application/xhtml+xml'. Interoperability considerations : Rules for processing both conforming and non-conforming content are defined in http://www.w3.org/TR/html. Published specification : Labeling a resource with the application/xhtml+xml type asserts that the resource is an XML document that likely has a root element from the HTML namespace. Thus, the relevant specifications are the XML specification, the Namespaces in XML specification, and http://www.w3.org/TR/html. Applications which use this media : Web browsers, tools for processing Web content, HTML authoring tools, search engines, validators. Fragment identifier considerations : Same as for application/xml [RFC7303] Restrictions on usage : No restrictions apply. Provisional registration? (standards tree only) : No. Additional information : 1. Deprecated alias names for this type : N/A 2. Magic number(s) : No sequence of bytes can uniquely identify an XHTML document. More information on detecting XHTML documents is available in the MIME Sniffing specification. 3. File extension(s) : "xhtml" and "xht" are sometimes used. 4. Macintosh file type code : TEXT 5. Object Identifiers: N/A Person to contact for further information : 1. Name : Robin Berjon 2. Email : robin&w3.org Intended usage : Common N/A Author/Change controller : Author/Change controller : Author: Ian Hickson Change controller: W3C