XPath over DOM

Are there any Java-based XSLT or XPath implementations (at least partial
functionality) that can traverse over existent DOM object, as opposed to
creating their own in-memory structure? I need to be able to provide my own
Document object built by my own parser, not just DOM APIs over internal
processor structure (as Saxon implementation).

Thanks,

- Eugene

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list