what is xml ??

hi there

i want to know what is " xml " ?

and what i can do by it ?

thanks

eXtensible Markup Language.
Basically it just away to describe data. And you cant do anything really with XML alone. There are things you can do to process, read, write, and style the data in an XML.

XML is just data written in a known format that many applications understand.

http://www.w3schools.com/xml/default.asp
A good place to start.