<element name="PurchaseOrderReferenceInformation">
<complexType>
<sequence>
<element ref="pidx:OrderNumber" />
<element ref="pidx:OrderDate" minOccurs="0" />
<element ref="pidx:LineItemNumber" minOccurs="0" />
<element ref="pidx:ChangeSequenceNumber" minOccurs="0" />
<element ref="pidx:ReleaseNumber" minOccurs="0" />
</sequence>
</complexType>
</element>
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