A set of interface methods that Hosted Applications and Hosting Systems use to communicate with each other.

An application launched and controlled by a Hosting System. The Hosted Application may utilize services offered by the Hosting System.

The application used to launch and control Hosted Applications. The Hosting System provides a variety of services such as DICOM object retrieval and storage for the Hosted Application. The Hosting System provides the infrastructure in which the Hosted Application runs and interacts with the external environment. This includes network access, database and security.