But in my XML. I get <Box> within another <Box> and we
  may get somemore parent <Box> element. 


oh yes, well then perhaps you want

  select=".//textbox"

You haven't really said which elements you do want to process
.//textbox will process all textbox elements in any descendent.

  So, I am looking for any Varaible assigning.
  Please suggest me.


You can't change the value of a variable once it is bound, so I don't
see how using a variable here would help.

David


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