I recently checked into CVS the addition of a sub-menu for locating xsl:function elements. It is, as the title notes, the first update of the xslide XSL mode for Emacs in literally years.
xslide itself may be a dead end since its based on neither nXML nor Semantic, so it doesn’t quite work the same as the other modes that people use (nor does it matter that it predates nXML). I still use xslide (which is why I updated it), and I even copied it to make an Emacs mode for Ant build files, but it would be more useful if it could indicate when the XSLT stylesheet is not well-formed. Then again, perhaps that problem could be solved with Flymake mode and an XML parser.