<?xml version="1.0"?>

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

      <elementtype name="TaxReference">
         <extends type="Tax">
            <append>
               <element type="TaxTreatmentCode" name="TaxTreatmentCoded"/>
               <element type="string" name="TaxTreatmentCodedOther" occurs="?"/>
            </append>
         </extends>
      </elementtype>

      <datatype name="TaxTreatmentCode">
         <enumeration datatype="NMTOKEN">
            <option>Other</option>
            <option>NoTaxApplies</option>
            <option>NetInvoiceLevel</option>
            <option>GrossInvoiceLevel</option>
            <option>NetLineLevel</option>
            <option>GrossLineLevel</option>
         </enumeration>
      </datatype>

   </schema>