I need to get the C node that has the field (name = p and value = 4)
How to get this without using index?
<A>
<B>
<C>
<field name="p" value="1"/>
<field name="q" value="2"/>
</C>
<C>
<field name="p" value="3"/>
<field name="q" value="4"/>
</C>
</B>
</A>