[cc-metadata] data: URLs -- yet another sick hack for stuffing RDF into (X)HTML documents
Jon Phillips
jon at rejon.org
Mon May 22 03:25:04 EDT 2006
Heya, you could at least go ahead and add this to the cc wiki. It is
quite hacky, but good to document.
http://wiki.creativecommons.org/metadata
Please don't make it front and center though, as it would be good to not
confuse ppl.
Are there other ways that you and others have thought of to accomplish
the same task? It would be great to document as many as possible for
different use cases.
Jon
On Thu, 2006-05-18 at 20:27 -0400, Evan Prodromou wrote:
> OK, so, I had a vision of yet another crazy way of embedding RDF into
> an (X)HTML document, besides the various nutty suggestions posted at
> http://creativecommons.org/technology/metadata/extend#html .
>
> Namely, use a data: URL within a <link> element. Data URLs allow you
> to put data directly into the content of an URL; see
> http://www.ietf.org/rfc/rfc2397.txt . So you could stuff all the RDF
> into a single <link> element, like:
> <link rel="meta" type="application/rdf+xml"
> href="data:application/rdf+xml,%3Crdf%3ARDF%20xmlns%3D%22http%
> 3A%2F%2Fweb.resource.org%2Fcc%2F%22%0D%0A%20%20%20%20xmlns%
> 3Adc%3D%22http%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%22%0D
> %0A%20%20%20%20xmlns%3Ardf%3D%22http%3A%2F%2Fwww.w3.org%
> 2F1999%2F02%2F22-rdf-syntax-ns%23%22%3E%0D%0A%3CWork%20rdf%
> 3Aabout%3D%22http%3A%2F%2Fexample.org%2Fgnomophone.mp3%22%3E%
> 0D%0A%20%20%3Cdc%3Atitle%3ECompilers%20in%20the%20Key%20of%20C
> %3C%2Fdc%3Atitle%3E%0D%0A%20%20%3Cdc%3Adescription%3EA%
> 20lovely%20classical%20work%20on%20compiling%20code.%3C%2Fdc%
> 3Adescription%3E%0D%0A%20%20%3Cdc%3Acreator%3E%3CAgent%3E%0D%
> 0A%20%20%20%20%3Cdc%3Atitle%3EYo-Yo%20Dyne%3C%2Fdc%3Atitle%3E%
> 0D%0A%20%20%3C%2FAgent%3E%3C%2Fdc%3Acreator%3E%0D%0A%20%20%
> 3Cdc%3Arights%3E%3CAgent%3E%0D%0A%20%20%20%20%3Cdc%3Atitle%
> 3EGnomophone%3C%2Fdc%3Atitle%3E%0D%0A%20%20%3C%2FAgent%3E%3C%
> 2Fdc%3Arights%3E%0D%0A%20%20%3Cdc%3Adate%3E1842%3C%2Fdc%3Adate
> %3E%0D%0A%20%20%3Cdc%3Aformat%3Eaudio%2Fmpeg%3C%2Fdc%3Aformat%
> 3E%0D%0A%20%20%3Cdc%3Atype%20rdf%3Aresource%3D%22http%3A%2F%
> 2Fpurl.org%2Fdc%2Fdcmitype%2FSound%22%20%2F%3E%0D%0A%20%20%
> 3Cdc%3Asource%20rdf%3Aresource%3D%22http%3A%2F%2Fexample.net%
> 2Fgnomovision.mov%22%20%2F%3E%0D%0A%20%20%3Clicense%20rdf%
> 3Aresource%3D%22http%3A%2F%2Fcreativecommons.org%2Flicenses%
> 2Fby-nc-nd%2F2.0%2F%22%20%2F%3E%0D%0A%20%20%3Clicense%20rdf%
> 3Aresource%3D%22http%3A%2F%2Fwww.eff.org%2FIP%2FOpen_licenses%
> 2Feff_oal.html%22%20%2F%3E%0D%0A%0D%0A%3C%2FWork%3E%0D%0A%0D%
> 0A%3CLicense%20rdf%3Aabout%3D%22http%3A%2F%
> 2Fcreativecommons.org%2Flicenses%2Fby-nc-nd%2F2.0%2F%22%3E%0D%
> 0A%20%20%3Cpermits%20rdf%3Aresource%3D%22http%3A%2F%
> 2Fweb.resource.org%2Fcc%2FReproduction%22%20%2F%3E%0D%0A%20%
> 20%3Cpermits%20rdf%3Aresource%3D%22http%3A%2F%
> 2Fweb.resource.org%2Fcc%2FDistribution%22%20%2F%3E%0D%0A%20%
> 20%3Crequires%20rdf%3Aresource%3D%22http%3A%2F%
> 2Fweb.resource.org%2Fcc%2FNotice%22%20%2F%3E%0D%0A%20%20%
> 3Crequires%20rdf%3Aresource%3D%22http%3A%2F%2Fweb.resource.org
> %2Fcc%2FAttribution%22%20%2F%3E%0D%0A%20%20%3Cprohibits%20rdf%
> 3Aresource%3D%22http%3A%2F%2Fweb.resource.org%2Fcc%
> 2FCommercialUse%22%20%2F%3E%0D%0A%0D%0A%3C%2FLicense%3E%0D%0A%
> 3C%2Frdf%3ARDF%3E" />
>
> (That's the RDF example from creativecommons.org.)
>
> It's not ideal, but it does have the nice properties of a) including
> the data in the HTML document itself, b) hiding the RDF from lame old
> browsers, c) being at least reasonably RFC-compatible, d) not being
> the grodie comment method. B-)
>
> Anyways, I thought it was worth posting as an interesting hack.
>
> ~Eva
>
>
> ______________________________________________________________________
>
> Evan Prodromou <evan at prodromou.name>
> http://evan.prodromou.name/
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--
Jon Phillips
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jon at rejon.org
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