<Customer ID="1234" xmlns="x-schema:sampleSchema.xml" 
                    xmlns:additional="myElements">
  <Name>Elizabeth's Camera</Name>
  <Address>113 Lead</Address>
  <City>New York</City>
  <State>NY</State>
  <Zip>23412</Zip>
  <Phone>123-345-6789</Phone>
  <additional:PreferredDiscount>7% on purchases over $300</additional:PreferredDiscount>
  <additional:Contact>Beth</additional:Contact>
</Customer>