AB-xslt-007

The pipeline

<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:xslt version="1.0">
      <p:with-input port="source">
         <doc/>
      </p:with-input>
      <p:with-input port="stylesheet">
         <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
            <xsl:template match="/">
               <xsl:unknown-element/>
               <test-failed/>
            </xsl:template>
         </xsl:stylesheet>
      </p:with-input>
   </p:xslt>
</p:declare-step>