<p:library xmlns:p="http://www.w3.org/ns/xproc" xmlns:px="http://www.daisy.org/ns/pipeline/xproc" version="1.0"> <p:declare-step type="px:asciimathml"> <p:option name="asciimath" required="true"/> <p:output port="result" sequence="false" primary="true"/> </p:declare-step> </p:library>