The standard not(.=preceding-sibling::*) technique works only to eliminate
nodes with duplicate string-values, so it doesn't work here.

You're into Muenchian grouping, as described at www.jenitennison.com, or an
extension like the saxon:distinct() function.

Mike Kay

>
> I need to filter out only those nodes which have identical
> @id and @found
> attributes, or nodes which are exact duplicates of preceding
> nodes


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