
UML/BPMN Metamodel
A Service Task is a Task that uses some sort of service, which could be a Web service or an automated application.
A Service Task object shares the same shape as the Task, which is a rectangle that has rounded corners. However, there is a graphical marker in the upper left corner of the shape that indicates that the Task is a Service Task

Figure 12 : BpmnServiceTask (architecture_autodiagram)
Attribute | Description |
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string Implementation [1..1] | This attribute specifies the technology that will be used to send and receive the Messages.
Valid values are "##unspecified" for leaving the implementation technology open, "##WebService" for the Web service technology or a URI identifying any other technology or coordination protocol.
A Web service is the default technology. |
Association | Description |
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