Resources

Regular fragmentations http://simonstl.com/projects/fragment
Markup Object Events (MOE) http://moe.sourceforge.net
W3C XML Schema Datatypes, Appendix F http://www.w3.org/TR/xmlschema-2/#regexs
Parsing the Atom (XML.com) http://www.xml.com/pub/a/2001/04/25/deviant.html