Eliminating Duplicates in SharePoint XSLT Data Views or Drop-downs

I may want to create a custom dashboard enumerating all of the unique values from a column in a list.  In my example I have a list of possible releases of software where each has a Product column.  I want to build a menu of all of the Products from this list.

I give credit to this method to Marc Anderson at: http://sympmarc.com/2007/10/23/eliminating-duplicates-in-data-view-web-parts/



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