How to use group by in xslt

Question

I have a xml that has so many elements and most of that contain attributes.. for some of the attributes values are same so I need to group them and generate diff xml. I/p Ex

Answer 1

In XSLT 2.0 you should be able to do it with , current-grouping-key() and current-group()

Example:

See: http://www.w3.org/TR/xslt20/#grouping