Request for review of Turtle (an RDF serialization) media type: text/turtle

 W3C is about to publish a Team Submission for the RDF serialization Turtle. A mockup of the document to be published is at   http://www.w3.org/2007/11/21-turtle  Because the document will include the text of the media type registration, I am vetting this registration with ietf-types before publishing the document. Some discussion about the claim to force utf-8 encoding (and not require that in a charset parameter) can be seen at http://lists.w3.org/Archives/Public/www-archive/2007Dec/ (Subject: Media types for RDF languages N3 and Turtle) I got moderator-actioned for having too many folks in the Cc so I'm Bcc'ing them all in this request for review:  "Sean B. Palmer" <[email protected]>, Tim Berners-Lee <[email protected]>, "Daniel W. Connolly" <[email protected]>, Dave Beckett <[email protected]>, Lee Feigenbaum <[email protected]>, Garret Wilson <[email protected]>, Graham Klyne <[email protected]>, Dan Brickley <[email protected]>,   Type name:   text  Subtype name:   turtle  Required parameters:   None  Optional parameters:   None  Encoding considerations:   The syntax of Turtle is expressed over code points in   Unicode[UNICODE].  The encoding is always UTF-8 [RFC3629]; the   charset parameter is not needed; though it may be included so   long as the value is 'UTF-8'.    Unicode code points may also be expressed using an \uXXXX (U+0 to   U+FFFF) or \UXXXXXXXX syntax (for U+10000 onwards) where X is a   hexadecimal digit [0-9A-F]  Security considerations:   Turtle uses IRIs as term identifiers. Applications interpreting data   expressed in Turtle sould address the security issues of   Internationalized Resource Identifiers (IRIs) Section 8, as well as   Uniform Resource Identifier (URI): Generic Syntax [RFC3986] Section 7    Multiple IRIs may have the same appearance. Characters in different   scripts may look similar (a Cyrillic "o" may appear similar to a Latin   "o"). A character followed by combining characters may have the same   visual representation as another character (LATIN SMALL LETTER E   followed by COMBINING ACUTE ACCENT has the same visual representation   as LATIN SMALL LETTER E WITH ACUTE). Any person or application that   is writing or interpreting data in Turtle must take care to use the   IRI that matches the intended semantics, and avoid IRIs that make look   similar. Further information about matching of similar characters can   be found in Unicode Security Considerations [UNISEC] and   Internationalized Resource Identifiers (IRIs) [RFC3987] Section 8.  Interoperability considerations:   There are no known interoperability issues.  Published specification:   TBD, in the mean time, see http://www.w3.org/2007/11/21-turtle  Applications which use this media type:   No widely deployed applications are known to use this media type. It   may be used by some web services and clients consuming their data.  Additional information:  Magic number(s):   Turtle documents may have the strings '@prefix' or '@base' (case   dependent) near the beginning of the document.  File extension(s):   ".ttl"  Base URI:   The Turtle '@base <IRIref>' term can change the current base URI for   relative IRIrefs in the query language that are used sequentially   later in the document.  Macintosh file type code(s):   "TEXT"  Person & email address to contact for further information:   Eric Prud'hommeaux <[email protected]>  Intended usage:   COMMON  Restrictions on usage:   None  Author/Change controller:   The Turtle specification is the product of David Beckett and Tim   Berners-Lee. A W3C Working Group may assume maintenance of this   document; W3C reserves change control over this specifications.   Normative References  [RFC3023] Murata, M., St. Laurent, S., and D. Kohn, "XML Media Types",           RFC 3023, January 2001.  [RFC3629] F. Yergeau, "UTF-8, a transformation format of ISO 10646",           RFC 3629, November 2003.  [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform           Resource Identifier (URI): Generic Syntax", STD 66, RFC           3986, January 2005.  [RFC3987] Duerst, M. and M. Suignard, "Internationalized Resource           Identifiers (IRIs)", RFC 3987, January 2005.  [UNICODE] The Unicode Standard, Version 4. ISBN 0-321-18578-1, as 	  updated from time to time by the publication of new 	  versions. The latest version of Unicode and additional 	  information on versions of the standard and of the Unicode 	  Character Database is available at 	  http://www.unicode.org/unicode/standard/versions/.  [UNISEC]  Mark Davis, Michel Suignard, "Unicode Security           Considerations.           http://www.unicode.org/reports/tr36/  --  -eric  office: +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA mobile: +1.617.599.3509  ([email protected]) Feel free to forward this message to any list for any purpose other than email address distribution.