This image shows the Source:FulfillOrder.wsdl in the left side, containing the following entries:

inp1:orderInfoVOSDO
   inp1:OrderId
   inp1:OrderDate
   inp1:OrderShippedDate
   inp1:OrderStatusCode
   inp1:OrderTotal

The XSLT File:FulfillmentBatch.wsdl in the right side, containing the following entries:

<target>
   opaque:opaqueElement

It shows items mapped from inp1:orderInfoVOSDO on the Source side to the opaque:opaqueElement on the XSLT File side.