Tests p:document with dtd-validate='true' and DTD error (dtd in doc).
Test ab-p-document034.xml is expected to fail with error code err:XD0023.
<p:declare-step xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:output port="result">
   <p:identity>
      <p:with-input>
         <p:document href="../documents/ab-invalid-doc-dtd.xml" parameters="map{'dtd-validate': true()}">
      </p:with-input>
   </p:identity>
</p:declare-step>
Make sure that parsing works correctly for dtd-validation=true/false