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Overall description: The W3C Validator does not support validating XML files with the new media type application/vnd.recordare.musicxml+xml This media type was registered today and is listed at: http://www.iana.org/assignments/media-types/application/ <http://www.iana.org/assignments/media-types/application/vnd.recordare.musicxml+xml> We updated our web server to start serving our MusicXML files using this media type. This works in Firefox and Internet Explorer, but it breaks the W3C validator both in those Windows browsers and in Safari 2 on Mac OS 10.4.10. Steps to reproduce: 1) Go to http://validator.w3.org/ 2) Enter the following URL: http://www.recordare.com/xml/samples/MahlFaGe4Sample.xml 3) Click on Check. Actual results: A "Sorry! This document can not be checked." message is displayed, explaining that this media type is not exported. Expected results: Successful validation is expected, as was present when we were serving these as application/xml files. Additional information: The MusicXML format is currently supported by over 75 applications and used by hundreds of music software developers worldwide. We have recommended this new version of the W3C validator as a great tool for those learning to write MusicXML files. Lack of support for the MusicXML media type will be blocking developers from effective MusicXML product testing. I hope this is something that you can address quickly to restore the services of this wonderful tool to the MusicXML developer community. Thank you for your assistance, and please let me know if you need any further information.
Michael, thanks for bringing this bug up. I just patched the development version of the validator to accept documents served as application/anything+xml, which should fix the issue for MusicXML in particular. http://lists.w3.org/Archives/Public/www-validator-cvs/2007Sep/0066.html