after many readings
from many books i understood onething
if you want to learn xml do not buy microsoft books about xml
you will never understand xml this way
they will teach you how they implemet xml but not what exactly is xml and why is xml produced
i have read 4 books all from microsoft with no use
i still donot know what and why exactly is xml
but i downloaded a small tutorial from xmlspy.com
and there i got a small idea about xml