dummy question on QName

What is the QName of "match option" in

<p:declare-step type="p:add-attribute">
     <p:input port="source"/>
     <p:output port="result"/>
     <p:option name="match" required="true"/>
<!-- XSLTMatchPattern -->
     <p:option name="attribute-name" required="true"/>
<!-- QName -->
     <p:option name="attribute-value" required="true"/>
<!-- string -->
</p:declare-step>

Is it
a) {}match
b) {http://www.w3.org/ns/xproc}match
c) {http://www.w3.org/ns/xproc-step}match
d) ???

Mohamed



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