RE: flat structure to deep structure in a smart way

> In the element <line count="2"> you see an A1 again, so B22 
> should fall
> under A1 that's under line 1. I.e. if an element has the same value as
> in the previous line, it should become a subelement of the first line.
>
>
> What is the best strategy to accomplish this ?
As mentioned several times in the last couple of days, read

http://www.jenitennison.com/xslt/grouping

Michael Kay
http://www.saxonica.com/