<!--
  Loads a resource from an xml database.
-->
<p:config
  xmlns:p='http://www.orbeon.com/oxf/pipeline'
  xmlns:oxf='http://www.orbeon.com/oxf/processors'
  xmlns:xsl='http://www.w3.org/1999/XSL/Transform' 
  xmlns:xdb='http://orbeon.org/oxf/xml/xmldb'
>

  <!--
    The path name of the resource that needs to be loaded is present in the 
    input.
  -->
  <p:param name='instance' type='input'/>

  <!--
    The output is the loaded resource.
  -->
  <p:param name='data' type='output'/>

  <!-- 
    Retreive datasource configuration.
  -->
  <p:processor name='oxf:pipeline'>
    <p:input name='config' href='datasource.xpl'/>
    <p:output name='data' id='datasource'/>
  </p:processor>

  <!-- 
    Construct an xquery that retrieves the document.
  -->
  <p:processor name='oxf:xslt'>
    <p:input name='data' href='#instance'/>
    <p:input name='config'>
      <xdb:query collection='/db' xsl:version='2.0'>
        <xsl:text>xquery version '1.0';</xsl:text>
        <xsl:text>doc('/db</xsl:text>
        <xsl:value-of select='/*/resource'/>
        <xsl:text>')</xsl:text>
      </xdb:query>
    </p:input>
    <p:output name='data' id='query'/>
  </p:processor>

  <!-- 
    Run the xquery that was constructed before.
   -->
  <p:processor name='oxf:xmldb-query'>
    <p:input name='datasource' href='#datasource'/>
    <p:input name='query' href='#query'/>
    <p:output name='data' ref='data'/>
  </p:processor>

</p:config>