Re: XSL manipulating two XMLs

 	public Source resolve(String href, String base) throws
TransformerException {
 		href  = _workingDirPath + FILE_SEPARATOR_PROPERTY + href ;
 		System.out.println("href in URIResolver: " + href) ;
 		Source source = new SourceImpl(href) ;

 		return source ;
...
> SystemId Unknown; Line 50; Column 35; Can not load requested doc: Not
> supported: com.artesia.cus
> t.discovery.web.common.SourceImpl@437f31

The "SystemId Unknown" suggests the engine has some trouble
to get the name of your XSL file. How did you construct your
transformer? Did you use
  newTransformer(new StreamSource(new File(<full pathname to xsl>)))
There should be no need for an URIResolver in your case.