    <?xml version="1.0"?>
    <!DOCTYPE items [
    <!ELEMENT items (item*)>
    <!ELEMENT item (product, quantity)>
    <!ELEMENT product (description, price)>
    <!ELEMENT quantity (#PCDATA)>
    <!ELEMENT description (#PCDATA)>
    <!ELEMENT price (#PCDATA)>
    ]>

    <items>
       <item>
          <product>
             <description>Ink Jet Refill Kit</description>
             <price>29.95</price>
          </product>
          <quantity>8</quantity>
       </item>
       <item>
          <product>
             <description>4-Port Mini Hub</description>
             <price>19.95</price>
          </product>
          <quantity>4</quantity>
       </item>
    </items>