The Source and Result classes within TrAX are
  used to handle input and output documents. These classes can be extended to
  encapsulate additional input types. XSLTC's TrAX implementation contains an
  extension to the Source class:
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|  | 
    org.apache.xalan.xsltc.trax.XSLTCSource |  | 
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This extension class can be used to build XSLTC's internal
  DOM and cache it for later usage. The following sample shows how to
  use it with a Transformer:
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    public void run(String xmlfile, String xslfile) {
          // Create an XSLTCSource for the input XML document
          XSLTCSource source = new XSLTCSource(xmlfile);
          // Build a StreamSource for the stylesheet
          StreamSource stylesheet = new StreamSource(xslfile);
          // Create a Transformer instance and process the input
          Transformer transformer = factory.newTransformer(stylesheet);
          transformer.transform(source, new StreamResult(System.out));
	:
	:
    } |  | 
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If you do chose to implement a DOM cache, you should have your cache
  implement the javax.xml.transform.URIResolver interface so
  that documents loaded by the document() function are also read
  from your cache.