Metacat

<?xml version="1.0"?>

<pathquery version="1.2">

  <querytitle>Untitled-Search-2</querytitle>

  <returndoctype>-//ecoinformatics.org//eml-dataset-2.0.0beta4//EN</returndoctype>

  <returndoctype>-//ecoinformatics.org//eml-dataset-2.0.0beta6//EN</returndoctype>

  <returndoctype>-//NCEAS//eml-dataset-2.0//EN</returndoctype>

  <returndoctype>-//NCEAS//resource//EN</returndoctype>

  <returnfield>dataset/title</returnfield>

  <returnfield>originator/individualName/surName</returnfield>

  <returnfield>keyword</returnfield>

  <querygroup operator="INTERSECT">

    <querygroup operator="UNION">

      <querygroup operator="UNION">

        <queryterm searchmode="contains" casesensitive="false">

          <value>denyFirst</value>

          <pathexpr>acl/@order</pathexpr>

        </queryterm>

      </querygroup>

    </querygroup>

  </querygroup>

</pathquery>