I've poked about in google, but the nature of the terms makes
this a hard one for robots to find: Is it possible for XSL
to detect the SystemID given in the <!DOCTYPE> tag?
No, it's not part of the data model.
One option is to preprocess your document with a SAX filter that picks
up this information and turns it into processing instructions.
Michael Kay
Software AG
home: Michael(_dot_)H(_dot_)Kay(_at_)ntlworld(_dot_)com
work: Michael(_dot_)Kay(_at_)softwareag(_dot_)com
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list