I have a nodeset or arbitrary length that contains a set of tags which
look something like:
<branch id="br1">
<service id="service1" />
<service id="service2" />
<service id="service3" />
</branch>
<branch id="br2">
<service id="service1" />
<service id="service4" />
</branch>
Now what I want is a nodeset that contains (uniquely) all the services
that do not occur in all the branches. In this case I want service 2, 3
and 4 but not 1
My original solution was iffy. I ended up creating a tokenized string
("Service2|Service3|Service4" in this case) which I then ran through a
recursive named template which did a lot of substring-before and
substring-after. Since what I cared about are the ids, that was fine.
However, the input file is occasionally very large so this can take a
very long time. I want to find a better solution.
If possible, I think I'd like to avoid using extension functions, unless
there is an obvious performance boost.
Any thoughts?
Adam
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