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1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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2
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3 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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4
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5 <head>
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6 <title>DBTune - Echonest Analyze XML to Music Ontology RDF</title>
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7
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8 <style type="text/css" media="all">
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9 @import url(style.css);
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10 </style>
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11
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12 </head>
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13
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14 <body>
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15
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16
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17 <a href="http://dbtune.org/"><h1 style="font-size: 250%;">DBTune.org</h1></a>
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18
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19 <br/>
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20
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21 <div id="tagline">Echonest Analyze XML to Music Ontology RDF</div>
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22
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23
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24 <p>
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25 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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26 </p>
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27
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28 <p>
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29 Original file: <a href="http://dbtune.org/echonest/analyze-example.xml">analyze-example.xml</a><br/>
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30 Transform: <a href="http://dbtune.org/echonest/echonest.xsl">echonest.xsl</a><br/>
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31 Results: <a href="http://dbtune.org/echonest/analyze-example.rdf">analyze-example.rdf</a><br/>
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32 </p>
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33
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34 <p>
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35 <form method="get" action="http://www.w3.org/2005/08/online_xslt/xslt">
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36 <label>URI of XSL resource <input type="text" size="50" name="xslfile" value="http://dbtune.org/echonest/echonest.xsl"/></label>
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37 <br/>
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38 <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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39 <input type="submit" value="Transform!" name="transform">
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40 </form>
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41 </p>
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42
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43 <p>
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44 The resulting RDF can be queried using <a href="http://www.w3.org/TR/rdf-sparql-query/">SPARQL</a>.
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45 For example, the <a href="http://dbtune.org/echonest/structure.rq">following query</a>
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46 selects starts and durations for extracted structural segments (eg. chorus, verse, etc.).
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47 <pre>
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48 PREFIX af: <http://purl.org/ontology/af/>
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49 PREFIX event: <http://purl.org/NET/c4dm/event.owl#>
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50 PREFIX tl: <http://purl.org/NET/c4dm/timeline.owl#>
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51
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52 SELECT ?start ?duration
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53 FROM <http://dbtune.org/echonest/analyze-example.rdf>
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54 WHERE
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55 {
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56 ?e a af:StructuralSegment;
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57 event:time ?time.
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58 ?time tl:start ?start;
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59 tl:duration ?duration.
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60 }
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61 </pre>
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62 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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63 </p>
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64
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65 <p>
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66 The outputted RDF is designed using the <a href="http://musicontology.com/">
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67 Music Ontology</a>, the <a href="http://purl.org/ontology/af/">Audio Features ontology</a> and
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68 a small <a href="http://purl.org/ontology/echonest/">Echonest ontology</a> extending the latter.
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69 </p>
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70
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71 <p>
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72 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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73 by adding the following:
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74 <pre>
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75 <Analysis xmlns:grddl="http://www.w3.org/2003/g/data-view#"
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76 grddl:transformation="http://dbtune.org/echonest/echonest.xsl">
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77 ...
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78 </Analysis>
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79 </pre>
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80 </p>
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81
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82 <p>
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83 Author: <a href="http://moustaki.org/">Yves Raimond</a>
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84 </p>
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85
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86 <script type="text/javascript">
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87 var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
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88 document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
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89 </script>
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90 <script type="text/javascript">
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91 var pageTracker = _gat._getTracker("UA-3327144-3");
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92 pageTracker._initData();
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93 pageTracker._trackPageview();
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94 </script>
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95
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96
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97 </body>
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98
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99 </html>
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100
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