PFWG review of Ontology for Media Resource 1.0 http://www.w3.org/TR/2009/WD-mediaont-10-20090618/

This is feedback from the Protocols and Formats Working Group on the 18
June 2009 WD of Ontology for Media Resource 1.0
<http://www.w3.org/TR/2009/WD-mediaont-10-20090618/>. Group consensus to
send this feedback is recorded at
http://www.w3.org/2009/07/15-pf-minutes#item05. This review is focused
solely on accessibility implications of the draft spec.

Comment 1: Property for alternate versions

We request that you provide a property to indicate the location of
alternate versions (complete with the MIME type and location, and
keeping in mind that alternate versions of resources often have
different granularities so have to be referenced carefully). This might
correspond to the DCMI Metadata Terms hasFormat
http://www.w3.org/TR/2009/WD-mediaont-10-20090618/ or isFormatOf
http://dublincore.org/documents/dcmi-terms/#terms-isFormatOf. It is
possible that the ma:relation property fulfills this function but if so
this needs to be documented more clearly, including explanation of
accessibility use cases (ability to find alternate formats, including
transcriptions, captions, etc. of the "same" media).

Comment 2: Property for dependencies

It would be important to have a property corresponding to DCMI Metadata
Terms requires
http://dublincore.org/documents/dcmi-terms/#terms-requires. This would
be to indicate if the media requires something else to be played. If it
requires something else known to be inaccessible on the user's system,
then the media could be known to be unplayable from its metadata.

Michael Cooper
Team Contact, PFWG
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Michael Cooper
Web Accessibility Specialist
World Wide Web Consortium, Web Accessibility Initiative
E-mail cooper@w3.org <mailto:cooper@w3.org>
Information Page <http://www.w3.org/People/cooper/>