ab-validate-with-relax-ng-006

The pipeline

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" name="pipeline" version="3.0">
   <p:output port="result"/>
   <p:try>
      <p:output port="result"/>
      <p:validate-with-relax-ng>
         <p:with-input port="source">
            <doc>
               <p>Some paragraph.</p>
            </doc>
         </p:with-input>
         <p:with-input port="schema">
            <grammar xmlns="http://relaxng.org/ns/structure/1.0">
               <start>
                  <ref name="doc"/>
               </start>
               <define name="doc">
                  <element name="doc">
                     <ref name="title"/>
                     <zeroOrMore>
                        <ref name="p"/>
                     </zeroOrMore>
                  </element>
               </define>
               <define name="title">
                  <element name="title">
                     <text/>
                  </element>
               </define>
               <define name="p">
                  <element name="p">
                     <text/>
                  </element>
               </define>
            </grammar>
         </p:with-input>
      </p:validate-with-relax-ng>
      <p:catch name="catch">
         <p:output port="result"/>
         <p:identity>
            <p:with-input pipe="error@catch"/>
         </p:identity>
      </p:catch>
   </p:try>
</p:declare-step>