The pipeline
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
<p:output port="result"/>
<p:namespace-delete xmlns:pre="http://not-used" prefixes="pre">
<p:with-input>
<dummy:doc xmlns:dummy="http://dummy">
<dummy:section dummy:id="one">
<dummy:par>This is a para.</dummy:par>
<dummy:par>This is another para.</dummy:par>
</dummy:section>
<dummy:section dummy:id="two">
<dummy:par>First para.</dummy:par>
<dummy:par>Second para.</dummy:par>
</dummy:section>
</dummy:doc>
</p:with-input>
</p:namespace-delete>
</p:declare-step>
Schematron validation
<s:schema xmlns="http://www.w3.org/1999/xhtml" xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
<s:ns prefix="dummy" uri="http://dummy"/>
<s:pattern>
<s:rule context="/">
<s:assert test="/dummy:doc">The document root is not 'doc'.</s:assert>
<s:assert test="count(/dummy:doc/dummy:section)=2">Element doc does not have two children 'section'.</s:assert>
</s:rule>
<s:rule context="/dummy:doc/dummy:section">
<s:assert test="./@dummy:id">Section does not have an attribute 'id'.</s:assert>
<s:assert test="count(dummy:par)=2">Section does not have two paragraphs.</s:assert>
</s:rule>
</s:pattern>
</s:schema>
