XML
http://www.xml.com/pub/a/98/10/guide0.html
http://www.xmlfiles.com/dtd/default.asp

XSLT
http://www.vbxml.com/xsl/tutorials/intro/default.asp
http://www.w3schools.com/xsl
http://www.zvon.org/xxl/XSLTutorial/Books/Output/contents.html