Subject: RE: [xsl] What does the phrase "duplicates removed" mean precisely? From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Wed, 1 Feb 2006 03:38:37 -0000 |
> 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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