<?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>