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Re: rdf:Lists in RDFa?

From: Roberto García <roberto@rhizomik.net>
Date: Tue, 12 Jan 2010 16:20:05 +0100
Message-ID: <e56f135c1001120720u8d8bfacx31acc212eeceaf36@mail.gmail.com>
To: Toby Inkster <tai@g5n.co.uk>
Cc: public-rdfa@w3.org
Dear all,

First of all, thanks Toby for your examples about rdf:Lists in RDFa at
http://ontologi.es/rail/routes/gb/VTB1.xhtml

They have helped my a lot while extending the current versions of
RDF2HTML+RDFa and RDF2RDFa. Now, both tools are capable of generating
RDFa markup from RDF input including rdf:Lists.

Therefore, for instance, it is now possible to easily build RDFa
representations for complex owl:Class expressions. This has been the
driving scenario because the first objective was to represent
copyright licenses modelled using the Copyright Ontology, which makes
heavy use of them as a kind of pattern for the governed actions.

For instance, the license at
http://omediadis.udl.cat/licensing/ccbysa/CCBYSA_MyWork.owl is
rendered as HTML+RDFa:
http://rhizomik.net/redefer-services/rdf2html?rdf=http://omediadis.udl.cat/licensing/ccbysa/CCBYSA_MyWork.owl

or RDFa:
http://www.rhizomik.net/redefer-services/rdf2rdfa?rdf=http://omediadis.udl.cat/licensing/ccbysa/CCBYSA_MyWork.owl

And we have tested that we can recreate the original license using the
W3C's RDFa Distiller service:
http://www.w3.org/2007/08/pyRdfa/extract?uri=http://rhizomik.net/redefer-services/rdf2rdfa?rdf=http://omediadis.udl.cat/licensing/ccbysa/CCBYSA_MyWork.owl

In any case, there is still some additional testing to do with other
tools and more examples.

Best,

Roberto García
http://rhizomik.net/~roberto



2009/9/5 Toby Inkster <tai@g5n.co.uk>:
> On 5 Sep 2009, at 07:49, Roberto García wrote:
>
>> I've been able to find some references to this issue but it is not
>> clear for me if at last it is possible to use some sort of construct
>> that makes this easier than modelling all the triples for the list
>> with rdf:first, rdf:rest, rdf:nil,...
>
>
> Yes, rdf:Lists are truly horrible in RDFa. In fairness to RDFa, they're just
> a very complex structure and are horrible in a lot of RDF serialisations -
> N-Triples, TriX, RDF/JSON, etc. The only serialisations where they seem
> reasonable are those that provide syntactic sugar to handle them - e.g.
> Turtle and RDF/XML.
>
> Here's how I've marked up lists in RDFa:
>
> http://ontologi.es/rail/routes/gb/VTB1.xhtml
>
> --
> Toby A Inkster
> <mailto:mail@tobyinkster.co.uk>
> <http://tobyinkster.co.uk>
>
>
>
>
Received on Tuesday, 12 January 2010 15:20:38 UTC

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