1. Media Annotations Working Group – overview Joakim Söderberg / Felix Sasaki Contribution to "Accessibility of Media Elements in HTML 5 Workshop" November 1 st 2009

2. Purpose Facilitate metadata integration for media objects in the Web, such as video, audio and images Main means Ontology for Media Resources 1.0 API for Media Resources 1.0

3. MAWG Vision User sees an API, simple handling only texts and URI An Ontology relates the different metadata formats (this is hidden to the user) Mapping is provided by MAWG

4. Some formats in sight Formats: XMP DublinCore ID3 (metadata in audio) EXIF (metadata in images) Media RSS IPTC (news) MPEG7 TV-Anytime FRBR (multilevel description) Youtube Data API Protocol Other: SMPTE, LOM, METS, Cablelabs ADI 2.0, MIX, VRA etc.

5. Definition of metadata properties for multimedia objects: Ontology for Media Resource 1.0 Example properties ma:contributor ma:language ma:compression... From http://www.w3.org/TR/mediaont-10/

6. Relating properties to existing formats ma:contributor media:credit@role in YouTube Data API Protocol dc:creator in XMP exact related to

7. Relating properties to existing formats ma:contributor related to media:credit@role in YouTube Data API Protocol dc:creator in XMP exact semantic mappings: exact, related to, more specific, more general (motivated by SKOS)

8. Relating properties to existing formats ma:contributor related to media:credit@role in YouTube Data API Protocol dc:creator in XMP exact semantic mappings: exact, related to, more specific, more general syntactic mappings, e.g. "Unicode string" in XMP

9. API for Media Resource 1.0 Implementing the mappings from the ontology Proving access methods Example for ma:contributor property interface Contributors: Unstructured { attribute DOMString id; attribute DOMString role; }; From http://www.w3.org/TR/mediaont-api-1.0/#contributors

10. Challenges General Reading "easy part"... but how to (or if to) write "ma:" properties into media files Getting verification of mappings (needs to be based on actual usage, not on the specifications) Specific to Accessibility (How) does the media annotations approach (ontology and API) fit to Accessibility needs? Are there Accessibility-related properties to be related into "ma:"?

11. Resources Working Group Homepage http://www.w3.org/2008/WebVideo/Annotations/ Use Cases and Requirements for Ontology and API for Media Object 1.0 http://www.w3.org/TR/media-annot-reqs Ontology for Media Resources 1.0 http://www.w3.org/TR/mediaont-10/ API for Media Resources 1.0 http://www.w3.org/TR/mediaont-api-1.0/

12. Thank you for your attention!