YQL Thingieverse Table for Categories

thingieverse.categories.xml

<?xml version="1.0" encoding="UTF-8"?>
<table xmlns="http://query.yahooapis.com/v1/schema/table.xsd">
  <meta>
    <author>Nils Hitze</author>
    <documentationURL>http://silberkind.de/+</documentationURL>
    <sampleQuery>select * from {table} where category='toys-and-games'</sampleQuery>
  </meta>
  <bindings>
    <select itemPath="" produces="XML">
       <urls>
          <url>http://www.thingiverse.com/categories/{category}</url>
       </urls>
       <inputs>
         <key id="category" type="xs:string" required="true" paramType="path" />
       </inputs>
       <execute>
        <![CDATA[
      var query = null; 
      var xpath = "//div[@class='things']/*"; 

      query = y.query("select * from html where url=@url and xpath=\""+xpath+"\"", {url:request.url}); 
      var results = query.results.results;
for (var i = 0; i < results.length; ++i) {
      y.log(results[i]);
}
var json = {};
   response.object = results.results; 
	]]>
</execute>
    </select> 
 </bindings>
</table>