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cc-metadata - CC MP3 license verification RDF + XSL -> SMIL playlist

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Subject: discussion of the Creative Commons Metadata work

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  • From: Mike Linksvayer <ml AT creativecommons.org>
  • To: "cc-metadata AT lists.ibiblio.org" <cc-metadata AT lists.ibiblio.org>
  • Subject: CC MP3 license verification RDF + XSL -> SMIL playlist
  • Date: Wed, 29 Oct 2003 13:40:37 -0800

Input extracted from RDF embedded in
<http://creativecommons.org/extras/copyremix>.

XSL precedes my signature.

Output at <http://mirrors.creativecommons.org/copyremix/copyremix.smil>
(works for me with RealPlayer).

- The XSL has lots of hardcoded stuff, but demonstrates the principle.

- I'd like to do a better job of referring back to the source RDF. My weak
attempt -- note rdf:seeAlso in the playlist's Work element, and my swap of
rdf:about and dc:identifier for each track's Work element.

- Someone should create a web service that takes a URL containing embedded
verification RDF and turns it into a SMIL playlist.

- I think this is kinda cool, because the verification metadata is being used
as a source for generating something else useful, providing an additional
bonus
for musicians who go through the currently bothersome process of
implementing
our P2P strategy <http://creativecommons.org/technology/embedding>.

Thanks to Lucas for doing the research and writing on SMIL necessary to make
this
happen!



<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:cc="http://web.resource.org/cc/";>
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
<smil>
<head>
<metadata id="meta-rdf">
<rdf:RDF xmlns="http://web.resource.org/cc/";
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#";
xmlns:dc="http://purl.org/dc/elements/1.1/";>

<Work
rdf:about="http://mirrors.creativecommons.org/copyremix/copyremix.smil";>
<dc:title>"Copy Me Remix Me" Playlist</dc:title>
<dc:format>application/smil</dc:format>
<dc:source>http://creativecommons.org/extras/copyremix</dc:source>
<rdfs:seeAlso
rdf:resource="http://creativecommons.org/extras/copyremix"/>
<license rdf:resource="http://creativecommons.org/licenses/by/1.0/";
/>
</Work>

<xsl:for-each select="//cc:Work">
<Work rdf:about="{./dc:identifier}">
<dc:identifier><xsl:value-of select="./@rdf:about"/></dc:identifier>
<license rdf:resource="{./cc:license/@rdf:resource}" />
</Work>
</xsl:for-each>

<License rdf:about="http://creativecommons.org/licenses/by/1.0/";>
<permits rdf:resource="http://web.resource.org/cc/Reproduction"; />
<permits rdf:resource="http://web.resource.org/cc/Distribution"; />
<requires rdf:resource="http://web.resource.org/cc/Notice"; />
<requires rdf:resource="http://web.resource.org/cc/Attribution"; />
</License>
<xsl:for-each select="//cc:License">
<xsl:copy-of select="." />
</xsl:for-each>
</rdf:RDF>
</metadata>
</head>
<body>
<seq>
<xsl:for-each select="//dc:identifier">
<audio src="{.}"/>
</xsl:for-each>
</seq>
</body>
</smil>
</xsl:template>
</xsl:stylesheet>


--
Mike Linksvayer
http://creativecommons.org/learn/aboutus/people#21




  • CC MP3 license verification RDF + XSL -> SMIL playlist, Mike Linksvayer, 10/29/2003

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