You could start with these:

http://www.west-wind.com/presentations/xmlmessaging/xmlmessaging.htm
http://www.west-wind.com/wwxml.asp
http://fox.wikis.com/wc.dll?wiki~CategoryXML
http://msdn.microsoft.com/xml/default.asp

Should be enough information and links to keep you busy for a long time...

>I want to know how to build a simple xml page. That is i am not able to distinguish DOCUMENT TYPE DEFINITION, XSLT, XPATH & XML.
>can anyone define this \
>Thanks in advance.
>regards,
>ashwath