(RFC 4267 published November 2005, subtype last updated November 2005) MIME media type name: application MIME subtype names: voicexml+xml, ssml+xml, srgs+xml, ccxml+xml, pls+xml Required parameters: none Optional parameters: "charset": This parameter has identical semantics to the charset parameter of the "application/xml" media type as specified in RFC 3023 [RFC3023]. Encoding Considerations Identical to those of "application/xml" as described in RFC 3023 [RFC3023], section 3.2. Interoperability Considerations There are no known interoperability issues. Published Specifications Voice Extensible Markup Language 2.0 [VoiceXML2.0] Voice Extensible Markup Language 2.1 [VoiceXML2.1] Speech Synthesis Markup Language (SSML) Version 1.0 [SSML] Speech Recognition Grammar Specification Version 1.0 [SRGS] Voice Browser Call Control: CCXML Version 1.0 [CCXML] Pronunciation Lexicon Specification (PLS) Version 1.0 [PLS] Applications that Use These Media Types Various W3C Speech Interface Framework implementations use these media types. Security Considerations Several instructions in the cited specifications may cause arbitrary Uniform Resource Identifiers (URIs) to be dereferenced. In this case, the security issues of [RFC3986], section 7, should be considered. In addition, because of the extensibility features of those specifications, it is possible that the registered media types may describe content that has security implications beyond those described here. However, if the processor follows only the normative semantics of the specifications, this content will be ignored. Only in the case where the processor recognizes and processes the additional content, or where further processing of that content is dispatched to other processors, would security issues potentially arise. And in that case, they would fall outside the domain of this registration document. Additional Information Magic Numbers Although no byte sequences can be counted on to always be present, XML MIME entities in ASCII-compatible charsets (including UTF-8) often begin with hexadecimal 3C 3F 78 6D 6C (" Intended Usage COMMON Change Controller The Speech Interface Framework specifications set is a work product of the World Wide Web Consortium's Voice Browser Working Group. The W3C has change control over these specifications.