My latex pipeline:

<pipeline xmlns="http://www.w3.org/2002/02/xml-pipeline"
          xml:base="http://example.org/">
   <param name="target" select="'result'"/>
   <processdef name="filter.p" definition="org.mathdoc.tools.FilterUnicode"/>
   <processdef name="validate.p" definition="org.example.xml.XmlSchema"/>
   <processdef name="transform.p" definition="org.example.xml.XSLT"/>
   <process id="m1" type="validate.p">
     <input name="document" label="mydoc.xml"/>
     <input name="schema" label="mathpaper.xsd"/>
     <output name="result" label="valid"/>
     <error name="invalid" label="#invalidDocument"/>
   </process>
   <process id="m2" type="transform.p">
     <input name="stylesheet" label="paper2tex.xsl"/>
     <input name="document" label="valid"/>
     <output name="result" label="texresult"/>
     <param name="chunk">0</param>
   </process>
   <process id="m3" type="filter.p">
     <input name="document" label="texresult"/>
     <output name="result" label="filtered"/>
   </process>
   <process id="m4" type="transform.p">
     <input name="stylesheet" label="finalsyntax.xsl"/>
     <input name="document" label="filtered"/>
     <output name="result" label="mydoc.tex"/>
   </process>
   <process id="b1" type="transform.p">
     <input name="stylesheet" label="paper2bib.xsl"/>
     <input name="document" label="valid"/>
     <output name="result" label="bib-texresult"/>
     <param name="chunk">0</param>
   </process>
   <process id="b2" type="filter.p">
     <input name="document" label="bib-texresult"/>
     <output name="result" label="mydoc.bib"/>
   </process>
   <document name="invalidDocument">
     <error>
      Your document is not valid!
     </error>
   </document>
</pipeline>