pipelineception-014

The pipeline

<p:declare-step xmlns:ex="http://example.com/ns" xmlns:map="http://www.w3.org/2005/xpath-functions/map" xmlns:p="http://www.w3.org/ns/xproc" xmlns:xs="http://www.w3.org/2001/XMLSchema" name="main" version="3.0">
   <p:output port="result" sequence="true"/>
   <p:declare-step type="ex:pipeline">
      <p:input port="source" sequence="true"/>
      <p:output port="result"/>
      <p:count/>
   </p:declare-step>
   <p:declare-step type="ex:do-xslt">
      <p:output port="result"/>
      <p:xslt>
         <p:with-input>
            <doc/>
         </p:with-input>
         <p:with-input port="stylesheet">
            <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="xs" version="3.0">
               <xsl:template match="/">
                  <xsl:variable name="seq" select="(/*, map{{'text': 'Hello, world.'}}, 'string')"/>
                  <count>
                     <xsl:sequence select="string(ex:pipeline($seq)?result)"/>
                  </count>
               </xsl:template>
            </xsl:stylesheet>
         </p:with-input>
      </p:xslt>
   </p:declare-step>
   <ex:do-xslt/>
</p:declare-step>