<?xml version="1.0"?>

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

      <elementtype name="PaymentRequestHeader">
         <model>
            <sequence>
               <element type="Purpose" name="PaymentRequestPurpose"/>
               <element type="datetime" name="PaymentRequestIssueDate"/>
               <element type="Reference" name="PaymentRequestID"/>
               <element type="PayerParty"/>
               <element type="Language"/>
               <element type="string" name="GeneralNotes" occurs="?"/>
               <element type="Attachment" name="PaymentRequestAttachment" occurs="?"/>
            </sequence>
         </model>
      </elementtype>

   </schema>