p:add-xml-base 004 (NW)

The pipeline

<p:declare-step xmlns:err="http://www.w3.org/ns/xproc-error"
                xmlns:p="http://www.w3.org/ns/xproc"
                xmlns:t="http://xproc.org/ns/testsuite/3.0" version="3.0">
   <p:output port="result"/>
   <p:add-xml-base relative="true" all="true">
      <p:with-input href="../documents/doc-with-entities.xml"/>
   </p:add-xml-base>
</p:declare-step>