might be a prob with p:delete e.g. using the following pipeline

<p:pipeline name="pipeline" xmlns:p="http://www.w3.org/ns/xproc">

<p:delete name="step1"> <p:with-option name="match" select="//a"/> </p:delete>

</p:pipeline>

on std input of

<?xml version="1.0" encoding="UTF-8"?> <test> <a>test1</a> <b/> </test>

returns

<?xml version="1.0" encoding="UTF-8"?> <test> <a>test1</a> <b/> </test>

I would expect the <a/> element to be removed.