See this thread on general@xml and it's previous documents: http://marc.theaimsgroup.com/?l=xml-apache-general&m=100652621822282&w=2 You'll obviously have to ask the Xerces-J community about what their plans are for .jar file packaging, but from that thread I think they're going to adopt a similar model (xalan/xerces.jar are just implementation classes, xml-apis.jar are just externally-defined standards based files and interfaces)
I have no idea what xml.jar is, the Xalan project doesn't ship one. Oh, wait, we do! 8-) Um, it's used for our xsltc mode support; if you're just using the default xalan mode (which you are unless you specifically have changed) then you should not be using it at all. It's scheduled for removal once we get more of the core xsltc and xalan code integrated. - Shane
