This document is under construction.
The "W3C Recommendations" are good references on XSLT, XPath expressions, and related standards.
XSLT (http://www.w3.org/TR/xslt)
XPath (http://www.w3.org/TR/xpath)
XHTML 1.0 (http://www.w3.org/TR/xhtml1)
Canonical XML 1.0 (http://www.w3.org/TR/xml-c14n)
