[xsl] Mapping from two sources

Subject: [xsl] Mapping from two sources
From: sudheshna iyer <sudheshnaiyer@xxxxxxxxx>
Date: Fri, 1 Oct 2010 12:14:48 -0700 (PDT)
I need to have two sources:

input1 and input2. 

input1:
<?xml version="1.0" encoding="ISO-8859-1"?>
<Order>
	<OrderLine>
			<OLN>1</OLN>
			<Fname>aa</Fname>
	</OrderLine>
	<OrderLine>
			<OLN>2</OLN>
			<Fname>bb</Fname>
	</OrderLine>	
</Order>


input2:
<?xml version="1.0" encoding="ISO-8859-1"?>
<POOrder>
	<POOrderLine>
			<OLN>1</OLN>
			<ID>123</ID>
			<LName>aa</LName>
	</POOrderLine>
	<POOrderLine>
			<OLN>2</OLN>
			<ID>324</ID>
			<LName>bb</LName>
	</POOrderLine>	
</POOrder>

I need the output from both sources combined. Please note that first two elements are coming from input1 and thrid element is from input2. What is the 
optimal way of doing this?

<?xml version="1.0" encoding="ISO-8859-1"?>
<OrderResponse>
	<Oline>
		<OLN>1</OLN>
		<Fname>aa</Fname>
		<ID>123</ID>
	</Oline>
	<Oline>
		<OLN>2</OLN>
		<Fname>bb</Fname>
		<ID>324</ID>
	</Oline>
</OrderResponse>

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