test-param-manipulation.xpl

<?xml version="1.0" encoding="UTF-8"?>
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:c="http://www.w3.org/ns/xproc-step" 
  version="1.0"
  name="test-params">
  
  <p:input port="params" kind="parameter" primary="true"/>
  
  <p:input port="source" primary="true">
    <p:inline>
      <doc>Hello world!</doc>
    </p:inline>
  </p:input>
  
  <p:output port="result" primary="true"/>
  <p:serialization port="result" omit-xml-declaration="false" indent="true"/>
  
  <p:sink>
    <p:documentation>Discard source for the time being…</p:documentation>
  </p:sink>
  
  <p:parameters name="consolidate-params">
    <p:input port="parameters">
      <p:pipe port="params" step="test-params"/>
    </p:input>
  </p:parameters>

  <p:xslt name="manipulate-params">
    <p:input port="source">
      <p:pipe port="result" step="consolidate-params"/>
    </p:input>
    <p:input port="parameters">
      <p:empty/>
    </p:input>
    <p:input port="stylesheet">
      <p:inline>
        <xsl:stylesheet version="2.0">
          <xsl:template match="* | @*">
            <xsl:copy>
              <xsl:apply-templates select="@*, node()"/>
            </xsl:copy>
          </xsl:template>
          <xsl:template match="c:param[@name = 'foo']/@value">
            <xsl:attribute name="{name()}" select="'baz'"/>
          </xsl:template>
          <xsl:template match="c:param[starts-with(@name, 'other')]">
            <xsl:copy>
              <xsl:attribute name="name" select="replace(@name, '^other-?', '')"/>
              <xsl:attribute name="value" select="replace(@name, '^other-?', '')"/>
            </xsl:copy>
          </xsl:template>
        </xsl:stylesheet>
      </p:inline>
    </p:input>
  </p:xslt>

  <p:store href="manipulated-params.xml" indent="true" omit-xml-declaration="false"/>

<!-- no p:sink if p:store precedes this (p:store doesn’t have a primary output) -->
<!--  <p:sink/>-->
  
  <p:group name="group">
    <p:xslt name="transform-source">
      <p:input port="source">
        <p:pipe port="source" step="test-params"/>
      </p:input>
      <p:input port="parameters">
        <p:pipe port="result" step="manipulate-params"/>
      </p:input>
      <p:input port="stylesheet">
        <p:inline>
          <xsl:stylesheet version="2.0">
            <xsl:param name="param" as="xs:string?"/>
            <xsl:param name="other-param" as="xs:string?"/>
            <xsl:param name="foo" as="xs:string?"/>
            <xsl:template match="/">
              <out>
                <param name="foo" value="{$foo}"/>
                <param name="other-param" value="{$other-param}"/>
                <param name="param" value="{$param}"/>
              </out>
            </xsl:template>
          </xsl:stylesheet>
        </p:inline>
      </p:input>
    </p:xslt>
  </p:group>

</p:declare-step>