RE: Another grouping problem
> This report must keep a running total of data by column. To get a running total, you either need to calculate each total by summing all the previous entries (which involves n*n/2 operations), or you need recursion, passing the current total as a parameter at each recursive step. Interestingly, running totals are one of the few examples I found where linear head-tail recursion (recursive processing of a sequence) is still needed in XSLT 2.0. Michael Kay
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