To complete the operation, we need to submit the value of the interface field using an ATTENTION ID for the Enter key: 
- In the Assignments pane, right-click and select New Assignment from the popup menu. 
 
- From the Assign to drop-down list, click ATTENTION ID. 
 
- From the Field 1/Operand 1 drop-down list, click ENTER. 
 
- Click OK. 
 
- Save the service interface. 
This completes the Query Data operation.