AB-namespace-delete-010

The pipeline

      <p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
         <p:output port="result"/>
         
         <p:namespace-delete prefixes="pre notdeclared">
            <p:with-input>
               <document xmlns="">
                  <element xmlns:att="http://att" xmlns:att1="http://att1" att:att="3" att1:att="4"/>
               </document>
            </p:with-input>
         </p:namespace-delete>
         
      </p:declare-step>