<grammar xmlns=“relaxng.org/ns/structure/1.0” datatypeLibrary=“www.w3.org/2001/XMLSchema-datatypes”>

<define name="executionhandler">
  <element name="executionhandler" ns="http://cpee.org/ns/properties/2.0">
    <data type="string">
      <param name="pattern">[a-zA-Z]+</param>
    </data>
  </element>
</define>

</grammar>