XPathAPI.selectSingleNode

["Albert, Kevin" <kj...@software.rockwell.com>]

I'm using Cocoon 1.7.3 (with Xalan 1.0.1) on Tomcat, and am trying to use XPathAPI to select a specific node in an XML document ... but am having trouble getting selectSingleNode to work.
I could just use the DOM getElementsByTagName and then verify that I've got the desired element node, but I'd rather select it directly with selectSingleNode.
Any suggestions/comments would be very appreciated.
 
Regards,
Kevin Albert
 
 
I've got the following schema doc:
 
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://rsi-logic2k/specweb" xmlns="http://www.w3.org/1999/XMLSchema" xmlns:rsi-fdd="http://rsi-logic2k/specweb">
   <simpleType base="string" name="actionType">
      <enumeration value="send">
         <annotation><documentation>to transport from one location to another location</documentation></annotation>
      </enumeration>
   </simpleType>
</schema>
 
 
 
and in the following XSP page, I would like to select the simpleType[@name='actionType'] node using XPathAPI.selectSingleNode():
 
<?xml version="1.0"?>
<?cocoon-process type="xsp"?>
<xsp:page language="java" xmlns:xsp="http://www.apache.org/1999/XSP/Core">
 
  <xsp:structure>
    <xsp:include>org.apache.xerces.dom.*</xsp:include>
    <xsp:include>org.apache.xerces.parsers.*</xsp:include>
    <xsp:include>org.apache.xml.serialize.*</xsp:include>
    <xsp:include>org.w3c.dom.*</xsp:include>
    <xsp:include>XPathAPI</xsp:include>
  </xsp:structure>
 
  <page>

    <xsp:logic xml:space="preserve">
      String paramOptionType = "Action";
      String optionFileSpec = "webapps/docroot/specweb/features/fdd/" + paramOptionType + "s/index.xsd";
      InputSource optionFile = new InputSource(optionFileSpec);
      DOMParser parser = new DOMParser();
      parser.parse(optionFile);
      Document docOption = parser.getDocument();
 
<!-- This returns null -->
      Node optionTypeNode = XPathAPI.selectSingleNode(docOption.getDocumentElement(),"simpleType[@name='actionType']");

<!-- This returns null -->
      Node optionTypeNode = XPathAPI.selectSingleNode(docOption.getDocumentElement(),"simpleType");
<!-- This returns null -->
      Node optionTypeNode = XPathAPI.selectSingleNode(docOption.getDocumentElement(),"//simpleType");

<!-- This returns null -->
      Node optionTypeNode = docOption.getElementsByTagName("simpleType[@name='actionType']");
 
<!-- This returns the simpleType node -->
      Node optionTypeNode = XPathAPI.selectSingleNode(docOption.getDocumentElement(),"child::*[1]");
<!-- This returns the simpleType node -->
      Node optionTypeNode = docOption.getElementsByTagName("simpleType").item(0);
 
    </xsp:logic>
  </page>
</xsp:page>