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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
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<head>
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<title>DBTune - Echonest Analyze XML to Music Ontology RDF</title> |
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<style type="text/css" media="all"> |
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@import url(style.css);
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</style>
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</head>
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<body>
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<a href="http://dbtune.org/"><h1 style="font-size: 250%;">DBTune.org</h1></a> |
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<br/> |
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<div id="tagline">Echonest Analyze XML to Music Ontology RDF</div> |
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<p>
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A simple XSL for transforming the results of the <a href="http://the.echonest.com/analyze.html">Echonest Analyze API</a> to <a href="http://musicontology.com/">Music Ontology</a> RDF. |
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</p>
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<p>
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Original file: <a href="http://dbtune.org/echonest/analyze-example.xml">analyze-example.xml</a><br/> |
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Transform: <a href="http://dbtune.org/echonest/echonest.xsl">echonest.xsl</a><br/> |
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Results: <a href="http://dbtune.org/echonest/analyze-example.rdf">analyze-example.rdf</a><br/> |
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</p>
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<p>
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<form method="get" action="http://www.w3.org/2005/08/online_xslt/xslt"> |
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<label>URI of XSL resource <input type="text" size="50" name="xslfile" value="http://dbtune.org/echonest/echonest.xsl"/></label> |
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<br/> |
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<label>URI of Echonest Analyze XML resource <input type="text" size="50" name="xmlfile" value="http://dbtune.org/echonest/analyze-example.xml"/></label><br/> |
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<input type="submit" value="Transform!" name="transform"> |
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</form>
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</p>
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<p>
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The resulting RDF can be queried using <a href="http://www.w3.org/TR/rdf-sparql-query/">SPARQL</a>. |
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For example, the <a href="http://dbtune.org/echonest/structure.rq">following query</a> |
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selects starts and durations for extracted structural segments (eg. chorus, verse, etc.). |
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<pre>
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PREFIX af: <http://purl.org/ontology/af/> |
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PREFIX event: <http://purl.org/NET/c4dm/event.owl#> |
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PREFIX tl: <http://purl.org/NET/c4dm/timeline.owl#> |
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SELECT ?start ?duration |
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FROM <http://dbtune.org/echonest/analyze-example.rdf> |
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WHERE |
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{
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?e a af:StructuralSegment; |
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event:time ?time. |
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?time tl:start ?start; |
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tl:duration ?duration. |
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} |
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</pre>
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I tested this query with <a href="http://librdf.org/rasqal/roqet.html">Roqet</a> and <a href="http://jena.sourceforge.net">ARQ</a>. |
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</p>
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<p>
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The outputted RDF is designed using the <a href="http://musicontology.com/"> |
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Music Ontology</a>, the <a href="http://purl.org/ontology/af/">Audio Features ontology</a> and |
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a small <a href="http://purl.org/ontology/echonest/">Echonest ontology</a> extending the latter. |
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</p>
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<p>
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RDF could be automatically extracted from the Echonest Analyze results through <a href="http://www.w3.org/TR/grddl/">GRDDL</a>, |
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by adding the following: |
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<pre>
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<Analysis xmlns:grddl="http://www.w3.org/2003/g/data-view#"
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grddl:transformation="http://dbtune.org/echonest/echonest.xsl">
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... |
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</Analysis> |
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</pre>
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</p>
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<p>
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Author: <a href="http://moustaki.org/">Yves Raimond</a> |
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</p>
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<script type="text/javascript"> |
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var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
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document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
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</script>
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<script type="text/javascript"> |
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var pageTracker = _gat._getTracker("UA-3327144-3");
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pageTracker._initData();
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pageTracker._trackPageview();
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</script>
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</body>
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</html>
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