Selecting an Attribute Based on Conditions of a Subseq

I am trying to select an attribute from a list of nodes that is conditional based on the contents of a node below it.

Here is the sample XML:

<?xml version="1.0" encoding="UTF-8"?>
<Account>
	<NodeName Name="Acme">
		<NodeType Value="Primary"/>
	</NodeName>
	<NodeName Name="Widget">
		<NodeType Value="Secondary"/>
	</NodeName>
</Account>

What I want is to select @Name from NodeName based on the @Value attribute in the NodeType element.  In other words, I want to determine which @Name attribute is Primary and which one is Secondary.  This XML is generated out of a database so its format is not very good and not always sorted.  This prevents me from doing this based strictly on position.

Any suggestions?

Thanks,
Jim


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