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[mawg] action-249: Ontology Rev. 7 available

From: Tobias Bürger <tobias.buerger@salzburgresearch.at>
Date: Wed, 08 Sep 2010 14:28:30 +0200
Message-ID: <4C87816E.2000509@salzburgresearch.at>
To: "public-media-annotation@w3.org" <public-media-annotation@w3.org>
  Dear all,

after some discussions in the previous week, we made an update to the 
ontology which you can find at 
http://www.salzburgresearch.at/~tbuerger/ma-ont-rev7.owl

What we changed:
We changed the things to which Pierre-Antoine referred to in his 
comments 1 and 3 in 
http://lists.w3.org/Archives/Public/public-media-annotation/2010Aug/0027.html, 
that is, we fixed the properties with multiple domain declarations 
(e.g., title and locator) and we adapted the Contributor subclass hierarchy.

Furthermore we added a new property isMadeOf to express that a 
MediaResource can be made of Audio - and/or VideoTracks.

I would like to note that we did not change the modelling wrt. to the 
restricted use of some properties (.e.g duration does not apply to 
Images) as both discussed options have their drawbacks in the one or 
other direction (e.g. when introducing new subclasses of MediaResource 
or when adding new properties whose use shall be restricted somehow).
The same arguments as the ones from Pierre-Antoine against the current 
solutions can be made with his proposal because what, for instance,

ma:Image rdfs:subClassOf ma:MediaResource, [
     a owl:Restriction ;
     owl:onProperty ma:duration ;
     owl:cardinality 0
   ]

tells us is, that Images are MediaResources which do not have a duration 
property. This gives imho also gives a wrong impression.

I had a discussion internally in my group and without telling them what 
options are being discussed at the moment, most of them favored the 
modelling which we currently have in our version.
Both aspects lead me to the conclusion that I keep this part of our 
ontology as it is for now. Unless new arguments or majority votes 
against our current modelling pop up :-)

Any feedback is again highly welcome!

@Thierry: If there are no objections you might publish this draft in the 
W3C web space.

Best regards,

Tobias

-- 
================================================================
Dr. Tobias Bürger         Knowledge and Media Technologies Group
Salzburg Research                           FON +43.662.2288-415
Forschungsgesellschaft                      FAX +43.662.2288-222
Jakob-Haringer-Straße 5/III   tobias.buerger@salzburgresearch.at
A-5020 Salzburg | AUSTRIA         http://www.salzburgresearch.at
Received on Wednesday, 8 September 2010 12:29:05 GMT

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