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RE: [xsl] What does the phrase "duplicates removed" mean precisely?

From: "Michael Kay" <mike@------------>
To:
Date: 2/1/2006 12:01:00 PM
> Now, if I had a structure like this:
> 
> <root>
>  <SomeTag>This is the text</SomeTag>
>  <SomeTag>This is the text</SomeTag>
> </root>
> 
> I'd have a duplicate.

No, when the spec speaks of duplicates it's generally talking about node
identity, not content. People sometimes use the phrase "two nodes with the
same identity" - I try to avoid that, because you've then got one node, not
two. A sequence contains duplicates if it contains the same node twice: for
example, with <root> in the above example as the context node, the sequence
(child::SomeTag, descendant::SomeTag) contains four items, namely two
occurrences of each of the two SomeTag nodes. If you replace the ","
operator with "|", duplicates are eliminated, and you end up with one
occurrence of each of the two SomeTag elements.

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


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