[xsl] dynamic # of columns and column ordering

["L Rutker" <lrutker at hotmail dot com>]

Hi,
I have to build a page that the user can set preferences for what columns he 
wants to see and in what order.

Can this be done purely with XSLT? How?
What would be the best way to approch this?
How would user preference data be best applied to the process?
How would the empty columns not show up in the output?

Thanks for any help.
Lou

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