This Figure shows an SOA Composite that contains a file adapter with a read operation and another file adapter with a write operation. The file adapter with the read operation appears in the business catalog under the References predefined module, while the file adapter with the write operation appears under the Services predefined Module. The BPMN process contains a message start event that defines the interface using the ReadList interface and invokes the Write operation in the WriteList file adapter using a service task. In the SOA Composite, the wires between the BPMN process and the file adapters indicate the described relationship.