W3C home > Mailing lists > Public > public-media-annotation@w3.org > February 2009

Re: mapping table 2.0

From: Pierre-Antoine Champin <pchampin@liris.cnrs.fr>
Date: Tue, 24 Feb 2009 10:41:04 +0000
Message-ID: <49A3CEC0.4050608@liris.cnrs.fr>
To: Eric Carlson <eric.carlson@apple.com>
CC: public-media-annotation@w3.org
Eric Carlson wrote:
> On Feb 23, 2009, at 4:50 AM, Pierre-Antoine Champin wrote:
>> I'm not sure designing "yet another" ontology of abstraction levels is a
>> good idea. Felix already pointed out that FRBR, for example, was not
>> entirely satisfactory to the BBC, and that they had to design their own
>> abstraction hierarchy.
>> I would favor a minimalistic approach with a single and very general
>> property. For that matter, it seems to me that dc:source [1] is a good
>> candidate, and this is what I used in my toy implementation.
>> More refined abstraction hierarchies could be defined by specializing
>> this property and introducing new classes, like the ones in FRBR or in
>> the BBC ontology, but I think committing to one or the other would only
>> limit the scope of our work.
>   I agree whole-heartedly - the first version of this spec should take
> as minimalistic an approach as possible.
>   I believe a single abstraction layer will be quite powerful, and
> additional complexity can be built on top of this in the next version of
> the spec *if* it proves to be necessary as people use the first version
> of the API.

I'm not sure what you mean by "a single abstraction layer". I am in
favor of allowing as many layers as one wants. What I don't want is to
commit to a particular *typology* of layers or inter-layer relations.

So I propose: any resource, including of course the media object being
described, may be linked to one or several other resources via a single
generic relation (I propose dc:source).

Anybody can then specialize that relation into, e.g. isCoverOf,
isTranslationOf, isParodyOf... and define subclasses of resources in the
abstraction hierarchy, e.g. Item, Manifestation, Expression, Work...

Received on Tuesday, 24 February 2009 10:41:50 UTC

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