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16.2.14.Sending SOAP Requests to Virtuoso SPARQL Endpoint

This section presents a sample scenario on how to execute a SPARQL query as a SOAP request to the Virtuoso SPARQL Endpoint.

  1. Assume the following sample SOAP request containing simple SPARQL query:

    <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <soapenv:Body>
      <query-request xmlns="http://www.w3.org/2005/09/sparql-protocol-types/#">
         <query xmlns="">SELECT DISTINCT ?z FROM virtrdf: {?x ?y ?z .} LIMIT 10</query>
      </query-request>
   </soapenv:Body>
</soapenv:Envelope>

  2. Save locally the content from above for ex. to file with the name "soap.xml".

  3. To pass the SOAP request to a Virtuoso SPARQL Endpoint, execute the following curl command:

    $ curl -d@soap.xml -H "Content-Type:text/xml" -H "SOAPAction: ''" http://example.com/sparql
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
    <query-result xmlns="http://www.w3.org/2005/09/sparql-protocol-types/#">
      <sparql xmlns="http://www.w3.org/2005/sparql-results#" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd">
        <head>
         <variable name="z"/>
        </head>
        <results distinct="false" ordered="true">
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMapFormat</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadStorage</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#array-of-QuadMapFormat</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMap</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMapValue</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#array-of-QuadMapColumn</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMapColumn</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#array-of-QuadMapATable</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMapATable</uri>
            </binding>
          </result>
          <result>
            <binding name="z">
             <uri>http://www.openlinksw.com/schemas/virtrdf#QuadMapFText</uri>
            </binding>
          </result>
        </results>
      </sparql>
    </query-result>
  </soapenv:Body>
</soapenv:Envelope>
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