Open Data table to run a query and stringify its return value

toXMLString.xml

<?xml version="1.0" encoding="UTF-8" ?>
<table xmlns="http://query.yahooapis.com/v1/schema/table.xsd">
  <meta>
    <author>Jeffery To</author>
    <description>Open Data table to run a query and stringify its return value</description>
    <sampleQuery>select * from {table} where query='select * from html where url="http://www.yahoo.com/"' and xpath='//a'</sampleQuery>
  </meta>
  <bindings>
  <select itemPath="" produces="XML">
    <urls>
      <url></url>
    </urls>
    <inputs>
      <key id="query" type="xs:string" paramType="variable" required="true" />
      <key id="xpath" type="xs:string" paramType="variable" required="false" />
    </inputs>
      <execute><![CDATA[
var q = y.query(query), results = q.results;
if (xpath) {
  results = y.xpath(results, xpath);
}
response.object = results.toXMLString();
      ]]></execute>
    </select>
  </bindings>
</table>