Is it possible to modify the source-tree?

Hi,
  I know we can use <xsl:copy-of> to modify the result tree. Is it possible to copy a portion of
the source tree on to a node in the source itself and continue on with the processing?
  The reason I want this is because I need the processor to interpret the copied tree as if it was
at a different location, so that it resolves its parent/sibling etc. accordingly.

Thanks,
Anupam.




	
		
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