This presentation: http://www.cafeconleche.org/slides/sd2002east/xlinks
XML Base Specification: http://www.w3.org/TR/xmlbase
XPath Specification: http://www.w3.org/TR/xpath
XML in a Nutshell, 2nd Edition
Elliotte Rusty Harold and W. Scott Means
O'Reilly & Associates, 2002
ISBN 0-596-00292-0
XPath: http://www.oreilly.com/catalog/xmlnut/chapter/ch09.html
XML Bible, Gold edition
Elliotte Rusty Harold
Hungry Minds, 2001
ISBN 0-7645-3597-8
XLinks: http://www.cafeconleche.org/books/bible2/chapters/ch19.html
Chapter 20 of the XML Bible, 2nd edition: http://www.cafeconleche.org/books/bible2/chapters/ch20.html
Who's Jon Johansen? http://www.eff.org/IP/DeCSS_prosecutions/Johansen_DeCSS_case/