<?xml version="1.0"?>

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

      <elementtype name="RelatedInvoiceRef">
         <model>
            <sequence>
               <element type="InvoiceType" name="RelatedInvoiceType"/>
               <element type="Reference" name="InvoiceNumber"/>
               <element type="string" name="InvoiceLineItemNumber" occurs="?"/>
            </sequence>
         </model>
      </elementtype>

      <elementtype name="ListOfRelatedInvoiceRef">
         <model>
            <element type="RelatedInvoiceRef" occurs="+"/>
         </model>
      </elementtype>

   </schema>