The pipeline
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" name="pipeline" version="3.0">
<p:output port="result"/>
<p:identity>
<p:with-input>
<p:inline content-type="text/plain">A text.</p:inline>
<p:inline content-type="text/plain">Another text.</p:inline>
</p:with-input>
</p:identity>
<p:choose>
<p:when test="false()">
<p:output port="result" content-types="application/xml"/>
<p:insert match="/" position="last-child">
<p:with-input>
<doc/>
</p:with-input>
<p:with-input port="insertion">
<element/>
</p:with-input>
</p:insert>
</p:when>
<p:otherwise>
<p:output port="result" sequence="true" content-types="text/plain"/>
<p:identity/>
</p:otherwise>
</p:choose>
<p:count/>
</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="c" uri="http://www.w3.org/ns/xproc-step"/>
<s:pattern>
<s:rule context="/">
<s:assert test="c:result">The root element is not 'c:result'.</s:assert>
<s:assert test="c:result/text()='2'">Text child of 'c:result' is not '2'.</s:assert>
</s:rule>
</s:pattern>
</s:schema>
