p:filter component

we already have p:load and p:store that do the same as p:document

I want to ask for a p:filter which would do the same as the mechanism behind
the <p:input select>

It would have this signature

<p:declare-step type="p:filter">
  <p:input port="source"/>
  <p:output port="result" sequence="true"/>
  <p:option name="select" required="true"/> <!-- XPath -->
</p:declare-step>

It would wrap the result of each selection in a <c:result> element


Mohamed
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