Hi, I am new to XSL. I don't know how to loop through XML and filter duplicates using XSL. Here is my requirement.My XML---------<?xml version="1.0" ?><X12Summary> <Unit volume="10" Amount="100"> <Identifier Name="Customer ID" Value="12345" /> <Identifier Name="Customer Name" Value="Jones Thomas" /> <?xml version="1.0" ?><X12Summary> <Unit volume="10" Amount="100"> <Identifier Name="Customer ID" Value="12345" /> <Identifier Name="Customer Name" Value="Jones Thomas" /> <Identifier Name="Address" Value="addr1" /&g