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cc-metadata - [cc-metadata] data: URLs -- yet another sick hack for stuffing RDF into (X)HTML documents

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  • From: Evan Prodromou <evan AT prodromou.name>
  • To: "cc-metadata AT lists.ibiblio.org" <cc-metadata AT lists.ibiblio.org>
  • Subject: [cc-metadata] data: URLs -- yet another sick hack for stuffing RDF into (X)HTML documents
  • Date: Thu, 18 May 2006 20:27:36 -0400

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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