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Re: DCMI Metadata Terms - request for help with RDF schemas

From: Thomas Baker <tom@tombaker.org>
Date: Tue, 22 May 2012 00:35:31 -0400
To: public-rdfa <public-rdfa@w3.org>
Cc: Mitsuharu Nagamori <nagamori@slis.tsukuba.ac.jp>, Shigeo Sugimoto <sugimoto@slis.tsukuba.ac.jp>
Message-ID: <20120522043531.GA48687@alpha.dublincore.org>
On Mon, May 21, 2012 at 06:05:08PM -0400, Tom Baker wrote:
> Jon and I are working hard to get DCMI Metadata Terms published ASAP.  We are
> currently focusing on content negotiation.  We plan to redirect all PURLs to a
> directory such as http://dublincore.org/2012-05-21.  Jon has written an
> .htaccess file for that directory that would direct incoming requests for the
> four "namespace" schemas -- Turtle by default, RDF/XML by request -- and
> requests for HTML to /documents/dcmi-terms/.  Jon is working on some
> Javascript, to be embedded in http://dublincore.org/documents/dcmi-terms/,
> which would take the browser to the spot in the document where the requested
> term is described.

The .htaccess can be seen at [1], and the Javascript at [2], invoked in
index.shtml in the "tabletags" branch at [3].

[1] https://github.com/dublincore/website/blob/tabletags/build/.htaccess
[2] https://github.com/dublincore/website/blob/tabletags/build/html/dcmi-terms/jump2location.js
[3] https://github.com/dublincore/website/blob/tabletags/build/html/dcmi-terms/index.shtml#L8322

> This will take some additional testing before it goes live, but we're
> optimistic.
> 
> In the meantime, we would appreciate some help in fixing three little problems
> in the scripts that generate the RDF schemas [1]:
> 
> -- One triple, not yet supported by the scripts, is missing:
>    <http://purl.org/dc/terms/creator> owl:equivalentProperty <http://xmlns.com/foaf/0.1/maker>
> 
>    The source that would need to be supported is at [2], the script that 
>    needs fixing is (I think!) at [3].

Mitsuharu has fixed this and the datatype problem (below) with fixes to [4] and [5].  The results
can be seen in the schemas at [6].

[4] https://github.com/dublincore/website/blob/master/web/xsl/common-templates.xsl
[5] https://github.com/dublincore/website/blob/master/web/xsl/dcterms.xsl
[6] https://github.com/dublincore/website/tree/tabletags/build

> -- Dates are not fully qualified with datatypes (as they are in the RDFa/HTML document.
>    For example, the schemas say:
> 
>        <http://purl.org/dc/terms/valid> dcterms:issued "2000-07-11" .
> 
>    instead of 
> 
>        <http://purl.org/dc/terms/valid> dcterms:issued "2000-07-11"^^<http://www.w3.org/2001/XMLSchema#date> .

Fixed!  See above.

> -- Two of the RDF schemas generated from the scripts express redundant triples (see
>    below).  This problem appears to have two aspects:
> 
>    1) The script is apparently outputting malformed XML (look closely at line 16 in 
>       dcam.rdf) [8] but neither Jon nor I know XSL well enough to see why.
> 
>    2) In both dcelements.rdf and dcam.rdf, the RDF/XML says:
> 
>         <rdf:Property rdf:about="http://purl.org/dc/elements/1.1/creator">
>         <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>
> 
>       whereas in dctype.rdf and dcterms.rdf, the RDF/XML says:
> 
>         <rdf:Description rdf:about="http://purl.org/dc/terms/creator">
>         <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>
> 
>       This would account for the "redundant triples", but neither Jon nor I can see how
>       the scripts are leading to these different results.

Mitsuharu is working on this.  Thank you, Mitsuharu!

Tom



> We would much appreciate help in this.
> 
> Many thanks,
> Tom
> 
> [1] https://github.com/dublincore/website/tree/master/build
> [2] https://github.com/dublincore/website/blob/master/2012-05-21/xmldata/dcterms-properties.xml#L64
> [3] https://github.com/dublincore/website/blob/master/web/xsl/dcelements.xsl
> [4] https://github.com/dublincore/website/blob/master/build/dcelements.rdf
> [5] https://github.com/dublincore/website/blob/master/build/dcam.rdf
> [6] https://github.com/dublincore/website/blob/master/build/dcelements.rdf
> [7] http://rdf.greggkellogg.net/distiller?format=ntriples&in_fmt=rdfxml&uri=https://raw.github.com/dublincore/website/master/build/dcelements.rdf
> [8] https://github.com/dublincore/website/blob/master/build/dcam.rdf#L16
> 
> 
> ----------------------------------------------------------------------
> Redundant triples generated from [4]
> 
>     <http://purl.org/dc/dcam/VocabularyEncodingScheme>  rdf:type rdfs:Class .
>     <http://purl.org/dc/dcam/memberOf>                  rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/contributor>       rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/coverage>          rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/creator>           rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/date>              rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/description>       rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/format>            rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/identifier>        rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/language>          rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/publisher>         rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/relation>          rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/rights>            rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/source>            rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/subject>           rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/title>             rdf:type rdf:Property .
>     <http://purl.org/dc/elements/1.1/type>              rdf:type rdf:Property .
> 
> 
> -- 
> Tom Baker <tom@tombaker.org>

-- 
Tom Baker <tom@tombaker.org>
Received on Tuesday, 22 May 2012 04:36:26 GMT

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