Dear Magnolians
I've got an Xpath challenge for you! Consider this tree :
<A>
<B id="1">
<C attr1="1" attr2="10 />
<C attr1="4" attr2="12 />
<C attr1="8" attr2="9 />
<C attr1="1" attr2="2 />
</B>
<B id="2">
<C attr1="7" attr2="10 />
<C attr1="4" attr2="6 />
</B>
<B id="3" />
<B id="4">
<C attr1="8" attr2="10 />
<C attr1="3" attr2="9 />
<C attr1="10" attr2="2 />
</B>
</A>
I need an xpath query which returns all "B" elements having either no
C-subelements or not having any C-subelements where attr1 < 4 and
attr2 > 7. So in my case this would be
- <B id="2"/>
- <B id="3"/>
The other way around would be rather easy:
//element(*,B)//element(*,C)[...@attr1 > 4 and @attr2 < 7]
But how do I get the Bs that don't have any Cs at all? I don't see how
the "not()" function can be used... so your input is warmly appreciated!
Thanks.
-will
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