http://www.ejim.co.uk/module/overview/xpath.htm
http://xpath.alephzarro.com/content/cheatsheet.html#chXPath
!DeepX ref at http://refcards.com/docs/deepx/xpath/XPath-1.0.pdf or http://www.digilife.be/quickreferences/QRC/XML%20Path%20Language%201.0.pdf
CategoryCheatSheet
