Can some one give a hint to how to deal about multi more than one level?
<A>
<B>1<B>
<C>
<D>2</D>
<E>3</E>
</C>
</A>
A has (B and C)
B has none
C has D and E
<A>
<B>1<B>
<C>
<D>2</D>
<E>3</E>
</C>
</A>
A has (B and C)
B has none
C has D and E