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Comments on the ontology document

From: Bailer, Werner <werner.bailer@joanneum.at>
Date: Tue, 16 Feb 2010 19:31:02 +0100
To: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
Message-ID: <CD9846F872C7874BB4E0FDF2A61EF09F7F9FD02D78@RZJC1EX.jr1.local>
Dear all,

Following today's telecon I have read through the current version of the ontology document ([1], 2010-02-04). I think that the version to be reviewed should be close to the one we intend to publish for last call, as there will not be time for a second round of reviews until March. Thus it should be a complete draft, which in my opinion includes the type definitions. My suggestion is to complete asap the type definitions for (most of/some of) the formats in the mapping tables and define the types for the core properties (defining the syntactic mappings should be straight forward then) before sending the document to review and publish as last call.

Apart from that I have a few other comments on the document:

- abstract and intro: we talk about a "common set of properties" without saying common between what
- abstract: "interoperability among various kinds of metadata formats" suggests that we would also support converting between formats A and B
- intro: "describe mapping between media resources" is not what we are doing
- intro, 3rd bullet about DC: "we might want to apply other restrictions" - do we want to be more specific here and say that we want to define stricter semantics, e.g. ma:format (MIME type of the resource) vs. dc:format (The file format, physical medium, or dimensions of the resource.)
- intro, last paragraph: we still say that the set of elements is "likely to be extended", I think we should consider now whether we want to add any of the elements discussed in [2] and drop this paragraph before going to LC
- 1.3: we should give some explanation why MPEG-21 is not in scope (e.g. not media description in narrower sense)
- def. media resource: add links to FRBR, BBC ontology
- def. property: the text talks about string or URI as value, but I think we should explicitly say that values of properties can be structured and/or unstructured 
- references: B has heading "References (Non-Normative)", so I assume A should be "References (Normative)"; however, I'm not sure if all the references are really normative, e.g. HTML5 (not referenced), MPEG-21 (out of scope)
- references: the FRBR reference is incomplete 
- references: the MPEG-21 reference is also incomplete - but nonetheless has a typo ;-)
- the list of properties is not up to date (the editorial team is probably aware of that)

Best regards,

[1] http://dev.w3.org/2008/video/mediaann/mediaont-1.0/mediaont-1.0.html
[2] http://www.w3.org/2008/WebVideo/Annotations/wiki/Candidate_Additional_Elements

  Werner Bailer
  Institute of Information Systems
  JOANNEUM RESEARCH Forschungsgesellschaft mbH
  Steyrergasse 17, A-8010 Graz, AUSTRIA
  phone:  +43-316-876-1218               mobile: +43-699-1876-1218
  web:    http://www.joanneum.at/iis        fax: +43-316-876-1191
  e-mail: mailto:werner.bailer@joanneum.at
Received on Tuesday, 16 February 2010 18:31:41 UTC

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