What I would like to do now is output a value that
appears only once throughout the XML file. For
example, if I have:
<a>
<b>value1</b>
<bb>value2</bb>
<bbb>value3</bbb>
</a>
<c>
<b>value1</b>
<bb>value2</bb>
<bbb>value4</bbb>
</c>
From the point of view of 'a', I would want to output
"value3" because 'a' contains it but 'c' does not.
This is assuming that the above is the entire file. I
also need to output a sibling of the node which does
not appear more than once (like the value of a/b or
a/bbb). It is also assumed that multiple instances of
the same value will have different parents. This is
shown in the example above.
Thanks for the help.
Jonathan
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