> 
> Suppose I have this XML:
> 
> <nodes>
> <node id="1" parent="0"/>
> <node id="2" parent="1"/>
> <node id="3" parent="2"/>
> </nodes>
> 
> So, node 2 is the child of node 1, node 3 is the child of node 2.
> 
> If I want to find the children of node 1 I believe I would write:
> /nodes/node[@parent='1']
> 
> But how do I write an XPath to select all the nodes that are 
> grandchildren
> of node 1?
> 
/nodes/node[@parent = /nodes/node[@parent='1']/@id]

Mike Kay 

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