<?xml version="1.0"?>

   <schema uri="urn:x-commerceone:document:com:commerceone:XCBL30:XCBL30.sox$1.0">

      <elementtype name="ChangeOrderHeader">
         <model>
            <sequence>
               <element type="ChangeOrderNumber"/>
               <element type="string" name="ChangeOrderSequence"/>
               <element type="datetime" name="ChangeOrderIssueDate"/>
               <element type="Reference" name="OrderReference"/>
               <element type="Party" name="SellerParty"/>
               <element type="Party" name="BuyerParty"/>
               <element type="ListOfReferenceCoded" occurs="?"/>
               <element type="Purpose"/>
               <element type="RequestedResponse" occurs="?"/>
               <element type="ChangeType"/>
               <element type="OrderType" occurs="?"/>
               <element type="OrderHeader" name="OriginalOrderHeader" occurs="?"/>
               <element type="OrderHeader" name="OrderHeaderChanges" occurs="?"/>
               <element type="string" name="ChangeOrderHeaderNote" occurs="?"/>
               <element type="ListOfStructuredNote" occurs="?"/>
            </sequence>
         </model>
      </elementtype>

      <elementtype name="ChangeOrderNumber">
         <model>
            <sequence>
               <element type="string" name="BuyerChangeOrderNumber"/>
               <element type="string" name="SellerChangeOrderNumber" occurs="?"/>
               <element type="ListOfMessageID" occurs="?"/>
            </sequence>
         </model>
      </elementtype>

   </schema>