XSL for structural transformations

I am trying to understand the scope of the structural transformations that
can be performed
using XSL (previous or forthcoming draft).

In XSL can I:

(1) Reverse a list
 i.e.  <x><y>1</y><y>2</y>...<y>n</y></x>
to    <x><y>n</y><y>n-1</y>...<y>1</y></x> for any i
(2) Transpose a table (rows to columns, columns to rows).

Are there any mechanism to bind values to variables in the pattern section
so that these variables
can then be used in the action section?

Thanks

Rakesh Mohan


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