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Service Composition

Different services are often required to work together to complete a task. A service composition is an aggregate of services collectively composed to automate a common task. Figure 1 shows the symbol used to represent an abstract service composition and Figure 2 illustrates a service composition from a service contract perspective that highlights which service capabilities are being invoked in a particular sequence.

Service Composition: A generic symbol used to represent a service composition.

Figure 1 - A generic symbol used to represent a service composition.

Service Composition: A service composition comprised of four services. Service A is acting as the service consumer of Services B, C, and D. The arrows indicate a sequence of modeled message exchanges. Note arrow #5 representing a oneway, asynchronous data delivery from Service A to Service D.

Figure 2 - A service composition comprised of four services. Service A is acting as the service consumer of Services B, C, and D. The arrows indicate a sequence of modeled message exchanges. Note arrow #5 representing a one-way, asynchronous data delivery from Service A to Service D.