Network Working Group M. Froumentin Internet-Draft July 12, 2004 Expires: January 10, 2005 The 'application/ssml+xml' Media Type draft-froumentin-ssml-media-reg-00.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on January 10, 2005. Copyright Notice Copyright (C) The Internet Society (2004). All Rights Reserved. Abstract This document defines the 'application/ssml+xml' media type for the Speech Synthesis based markup language. Froumentin Expires January 10, 2005 [Page 1] Internet-Draft The 'application/ssml+xml' Media Type July 2004 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Registration of MIME media type application/ssml+xml . . . . . 4 2.1 MIME media type name . . . . . . . . . . . . . . . . . . . . 4 2.2 MIME subtype name . . . . . . . . . . . . . . . . . . . . . 4 2.3 Required parameters . . . . . . . . . . . . . . . . . . . . 4 2.4 Optional parameters . . . . . . . . . . . . . . . . . . . . 4 2.4.1 charset . . . . . . . . . . . . . . . . . . . . . . . . 4 2.5 Encoding considerations . . . . . . . . . . . . . . . . . . 4 2.6 Fragment identifiers . . . . . . . . . . . . . . . . . . . . 4 2.7 Security Considerations . . . . . . . . . . . . . . . . . . 4 2.8 Interoperability considerations . . . . . . . . . . . . . . 5 2.9 Published specification . . . . . . . . . . . . . . . . . . 5 2.10 Applications which use this media type . . . . . . . . . . 5 2.11 Additional information . . . . . . . . . . . . . . . . . . 5 2.11.1 Magic number(s) . . . . . . . . . . . . . . . . . . . 5 2.11.2 File extension(s) . . . . . . . . . . . . . . . . . . 5 2.11.3 Macintosh File Type Code(s) . . . . . . . . . . . . . 5 2.12 Person & email address to contact for further information . . . . . . . . . . . . . . . . . . . . . . . 5 2.13 Intended usage . . . . . . . . . . . . . . . . . . . . . . 5 2.14 Author/Change controller . . . . . . . . . . . . . . . . . 5 3. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Author's Address . . . . . . . . . . . . . . . . . . . . . . . 6 Intellectual Property and Copyright Statements . . . . . . . . 7 Froumentin Expires January 10, 2005 [Page 2] Internet-Draft The 'application/ssml+xml' Media Type July 2004 1. Introduction Speech Synthesis Markup Language is an XML based markup language for assisting the generation of synthetic speech in web and other applications. The essential role of the markup language is to give authors of synthesizable content a standard way to control aspects of speech output such as pronunciation, volume, pitch, rate and etc. across different synthesis-capable platforms. Feedback or discussion about this draft should be directed to the Voice Browser Working Group public mailing list, www-voice@w3.org with archives at http://lists.w3.org/Archives/Public/www-voice/. Froumentin Expires January 10, 2005 [Page 3] Internet-Draft The 'application/ssml+xml' Media Type July 2004 2. Registration of MIME media type application/ssml+xml 2.1 MIME media type name application 2.2 MIME subtype name ssml+xml 2.3 Required parameters None. 2.4 Optional parameters 2.4.1 charset This parameter has identical semantics to the charset parameter of the application/xml media type as specified in [RFC3023]. 2.5 Encoding considerations By virtue of SSML content being XML, it has the same considerations when sent as "application/ssml+xml" as does XML. See [RFC3023], section 3.2. 2.6 Fragment identifiers For documents labeled as 'application/ssml+xml', the fragment identifier notation is exactly that for application/xml, as specified in [RFC3023]. 2.7 Security Considerations Several SSML instructions may cause arbitrary URIs to be dereferenced. In this case, the security issues of [RFC1738], section 6, should be considered. In addition, because of the extensibility features of SSML, it is possible that "application/ssml+xml" may describe content that has security implications beyond those described here. However, if the processor follows only the normative semantics of this specification, 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. Froumentin Expires January 10, 2005 [Page 4] Internet-Draft The 'application/ssml+xml' Media Type July 2004 2.8 Interoperability considerations Because SSML is extensible, conformant "application/ssml+xml" processors can expect that content received is well-formed XML, but it cannot be guaranteed that the content is valid SSML or that the processor will recognize all of the elements and attributes in the document. 2.9 Published specification This media type registration is for SSML documents as described by the W3C SSML specification at [SSML]. 2.10 Applications which use this media type There is no experimental, vendor specific, or personal tree predecessor to "application/ssml+xml", reflecting the fact that no applications currently recognize it. This new type is being registered in order to allow for the expected deployment of SSML on the World Wide Web, as a first class XML application. 2.11 Additional information 2.11.1 Magic number(s) There is no single initial octet sequence that is always present in SSML documents. See [RFC3023] for information pertaining to the identification of XML media types. 2.11.2 File extension(s) SSML documents are most often identified with the extensions ".ssml". 2.11.3 Macintosh File Type Code(s) TEXT 2.12 Person & email address to contact for further information Max Froumentin, 2.13 Intended usage COMMON 2.14 Author/Change controller The SSML specification is a work product of the World Wide Web Froumentin Expires January 10, 2005 [Page 5] Internet-Draft The 'application/ssml+xml' Media Type July 2004 Consortium's Voice Browser Working Group. The W3C has change control over these specifications. 3 References [RFC1738] Berners-Lee, T., Masinter, L. and M. McCahill, "Uniform Resource Locators (URL)", RFC 1738, December 1994. [RFC3023] Murata, M., St. Laurent, S. and D. Kohn, "XML Media Types", RFC 3023, January 2001. [SSML] Burnett, D., Walker, M. and A. Hunt, "Speech Synthesis Markup Language Version 1.0 Candidate Recommendation", December 2003. Author's Address Max Froumentin Froumentin Expires January 10, 2005 [Page 6] Internet-Draft The 'application/ssml+xml' Media Type July 2004 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. 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