Managing Service Interactions
A Service Interaction represents the exchange of information between architecture components.
A Service Interaction represents an interaction for service purpose between entities in a specific context inside or outside a company. These entities can be enterprise org-units, applications, activities or processes, as well as external org-units. The content of this interaction is described in a service interface.The content of a service interaction is described by a service interface.
A Service Interface is a template of a contract between entities (organizational, IT …). The contract is described by available operations which can be triggered trough messages exchanged by roles (vendor, buyer..).
For more details on service interfaces, see Describing a service interface.In a “Purchasing Requests Processing” application system structure diagram, two service Interfaces are used by the different service interactions.
Adding a service interaction to an application system structure diagram
The clients must be identified before entering an order. They can enter orders directly from “MyCompagny.com” application or by using a Call Center. The Call Center uses the “Call Management” application which uses the client identification service offered by the “MyCompagny.com” application.
Creating a Service interaction
To create a service interaction:
1. In the objects toolbar for a diagram, click Service interaction 
2. Click the entity requesting the service and draw a link to the entity providing the service.
3. In the add service interaction dialog box, specify the service interface you wish to use.
You can also use a new service interface. For more details, see Creating a service interface. 4. Click Add.