2. Actors, roles, interactions and assumptions

Cross-domain services essentially involve three players:

• the customer who subscribes to the cross-domain service ;

• the person responsible for providing the cross-domain service, and who is the customer's main contact for this service. It is the Business Owner (BO) who interfaces directly with the customer. The BO is an entity that is legally responsible for the contract signed with the customer for the provision (and a priori operation) of the cross-domain service. This legal responsibility is usually based on a contractual agreement between the customer and the BO. This agreement is known as a "Service Level Agreement" (SLA), and may include...