PO Example

<process name="purchaseOrderProcess" 
         targetNamespace="http://acme.com/ws-bp/purchase"
         xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
         xmlns:lns="http://manufacturing.org/wsdl/purchase">
   
   <partnerLinks>
      <partnerLink name="purchasing" 
               partnerLinkType="lns:purchasingLT"
               myRole="purchaseService"/>
      <partnerLink name="invoicing" 
               partnerLinkType="lns:invoicingLT"
               myRole="invoiceRequester"
               partnerRole="invoiceService"/>
      <partnerLink name="shipping" 
               partnerLinkType="lns:shippingLT"
               myRole="shippingRequester"
               partnerRole="shippingService"/>
      <partnerLink name="scheduling" 
               partnerLinkType="lns:schedulingLT"
               partnerRole="schedulingService"/>
   </partnerLinks>

   <variables>
      <variable name="PO" messageType="lns:POMessage"/>
      <variable name="Invoice" 
                 messageType="lns:InvMessage"/>
      <variable name="POFault" 
                 messageType="lns:orderFaultType"/>
      <variable name="shippingRequest" 
                 messageType="lns:shippingRequestMessage"/>
      <variable name="shippingInfo" 
                 messageType="lns:shippingInfoMessage"/>
      <variable name="shippingSchedule" 
                 messageType="lns:scheduleMessage"/>
   </variables>

   <faultHandlers>
      <catch faultName="lns:cannotCompleteOrder" 
             faultVariable="POFault">
         <reply   partnerLink="purchasing"
                  portType="lns:purchaseOrderPT" 
                  operation="sendPurchaseOrder"
                  variable="POFault" 
                  faultName="cannotCompleteOrder"/>
      </catch>
   </faultHandlers>
 
   <sequence>

      <receive partnerLink="purchasing" 
               portType="lns:purchaseOrderPT" 
               operation="sendPurchaseOrder" 
               variable="PO">
      </receive>

      <flow>

         <links>
            <link name="ship-to-invoice"/>
            <link name="ship-to-scheduling"/>
         </links>

         <sequence>
            <assign>
               <copy>
                  <from variable="PO" part="customerInfo"/>
                  <to variable="shippingRequest" 
                      part="customerInfo"/>
               </copy>
            </assign>
   
            <invoke  partnerLink="shipping" 
                     portType="lns:shippingPT" 
                     operation="requestShipping"
                     inputVariable="shippingRequest" 
                     outputVariable="shippingInfo">
               <source linkName="ship-to-invoice"/>
            </invoke>

            <receive partnerLink="shipping" 
                     portType="lns:shippingCallbackPT" 
                     operation="sendSchedule"
                     variable="shippingSchedule">
               <source linkName="ship-to-scheduling"/>
            </receive>

         </sequence>

         <sequence>

            <invoke  partnerLink="invoicing" 
                     portType="lns:computePricePT" 
                     operation="initiatePriceCalculation"
                     inputVariable="PO">
            </invoke>
            <invoke  partnerLink="invoicing" 
                     portType="lns:computePricePT" 
                     operation="sendShippingPrice"
                     inputVariable="shippingInfo">
               <target linkName="ship-to-invoice"/>
            </invoke>

            <receive partnerLink="invoicing" 
                     portType="lns:invoiceCallbackPT" 
                     operation="sendInvoice"
                     variable="Invoice"/>

         </sequence>

         <sequence>
            <invoke  partnerLink="scheduling" 
                     portType="lns:schedulingPT" 
                     operation="requestProductionScheduling"
                     inputVariable="PO">
            </invoke>
            <invoke  partnerLink="scheduling" 
                     portType="lns:schedulingPT" 
                     operation="sendShippingSchedule"
                     inputVariable="shippingSchedule">
               <target linkName="ship-to-scheduling"/>
            </invoke>
         </sequence>
      </flow>

      <reply partnerLink="purchasing" 
             portType="lns:purchaseOrderPT" 
             operation="sendPurchaseOrder" 
             variable="Invoice"/>
   </sequence>

</process>