Port=source:
<doc> <?pi test?> <p>This is a p.</p> </doc>
<p:pipeline name="pipeline" xmlns:p="http://www.w3.org/2007/03/xproc"> <p:input port="source"/> <p:output port="result"/> <p:identity name="identity"/> </p:pipeline>
Port=result:
<doc> <?pi test?> <p>This is a p.</p> </doc>