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Re: New Exif/RDF vocabulary

From: Simone Onofri <simone.onofri@gmail.com>
Date: Thu, 13 Dec 2007 20:31:54 +0100
Message-ID: <52bd7c3d0712131131p5c1227e2kf168a01217e59427@mail.gmail.com>
To: "KANZAKI Masahide" <mkanzaki@gmail.com>
Cc: semantic-web@w3.org

We've just talked few moths ago about EXIF RDF. I appreciate a lot
this update and I'll read deeply soon. Another great thing I  hope is
that You used both XML and JSON for interoperability. Usually more
implementors uses XML xor JSON. This is a great example.



On Dec 13, 2007 5:50 PM, KANZAKI Masahide <mkanzaki@gmail.com> wrote:
> Hello all,
> Several years after my release of Exif RDF vocabulary [1], I updated
> the schema with some significant changes.
> The old vocabulary was defined as RDF schema and no rdfs:domain and
> rdfs:range were provided for property descriptions. While many of Exif
> tag values come just as numbers, how to describe those values in RDF
> was not cleary defined.
> This time, I redefined the vocabulary as OWL ontology, so that tags
> whose values have pre-defined interpretation are defined as
> owl:ObjectProperty, and their possible values as resources denoted by
> URIs. Also, domain of properties are defined (via super properties) so
> as Exif's IFD structure to be retained in the RDF data.
> Although those changes made the new definition incompatible with the
> old one, I would keep its namespace URI [1 + '#'] intact. If you need
> old definition vocabulary (which might be easier to use in
> hand-writing), its copy is available at W3C with somewhat authentic
> URI [2]. I will finalize this change within a week unless any
> objection (e.g. assign different URI for new definition).
> For users convenience, the new definition comes with a JSON file [3]
> which provides mapping from Exif tags/values to RDF
> properties/value-resources. A sample Web application to extract RDF
> from image file [4] now uses the new definition.
> Comments, suggestions are welcome, of course.
> thanks,
> [1] http://www.kanzaki.com/ns/exif
> [2] http://www.w3.org/2003/12/exif/ns
> [3] http://www.kanzaki.com/ns/exif-tags.json
> [4] http://www.kanzaki.com/test/exif2rdf
> --
> @prefix : <http://www.kanzaki.com/ns/sig#> . <> :from [:name
> "KANZAKI Masahide", "神崎正英"; :email "mkanzaki@gmail.com"].

Simone Onofri
Received on Thursday, 13 December 2007 19:32:17 UTC

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