Describes concepts used to describe the system context in the SAF Functional Domain and related concepts.

Concept	Documentation
System Of Interest	An abstract element representing a SOI. Base class for specific kinds of SOIs.
System Use Case	The System Use Cases are a table of content of the services provided by the System of Interest to its System Actors. A System Use Case is only the abstract of the depicted System behavior and represents the purpose. While the main System of Interest interaction actors participating in this Use Case are identified, the behavior itself is specified by a Use Case Activity, Note: The intended use (and also misuse in so called "black use cases") of the System of Interest is captured in free text; story telling at a coarse level of detail which is understandable to Customers (non engineering stakeholders in general).
SUCincludingSUC	Specifies the fact that a System Use Case includes other System Use Cases. The included use case is then no longer a full System Use Case, but a partial System Use Case.
SUCenablingOSY	Specifies the fact that a System Use Case enables the realization of an Operational Story.
Logical Context Element	Represents an abstract element in the given System Context on Logical Level, outside the SOI scope, interacting with the SOI.
Logical External System	A Logical External System in the Logical Domain, outside the SOI scope, interacting with the SOI. E.g., power grid, mobile network, fresh water system (in a house).
Logical System Context	Specifies the fact that a System Context for a System of Interest is defined on Logical Level.
Logical Context SOI	Represents the Logical SOI in the System Context on Logical Level.
Operational Story	The Operational Story represents one or more Operational Use Cases in the Usage Scenario identified by the Operational Context. The Operational Story is described as narrative story-telling.
Logical Environment	A Logical Environment in the Logical Domain, outside the SOI scope, interacting with the SOI. E.g., air, dirt, sun, road.
Operational Performer	An Operational Performer is an element of the Operational Context that is capable to perform Operational Process Activities contributing to a specific identified Operational Capability. An Operational Performer may be any kind of organization, person, or even a system playing a role in one or more Operational Contexts. Aliases: UAF::OperationalPerformer
System Context Element	An abstract element representing a System Context Element. Base class for specific kinds of Context Elements.
SCEactingForOPR	Specifies the fact that a System Context Element is acting for the benefit of an Operational Performer.
SOIactingForOPR	Specifies the fact that a SOI is acting for the benefit of an Operational Performer.
LCEactingInSUC	Specifies the fact that a Logical Context Element acts in one or more System Use Cases.
Logical User	The Logical User is the representation for a human in the Logical Domain, outside the SOI scope, interacting with the SOI.
Logical Context Element Role	Specifies the fact that a Logical Context Element exists in a given Logical System Context.
Logical SOI Role	Specifies the fact that a Logical Context SOI exists in a given Logical System Context.
System Context Role	General role of a Logical System Context.
OPRcomposedOF	Specifies the fact that an Operational Performer consists of one or more Operational Performers.
SUCtakingPlaceInLSC	Specifies the fact that a System Use Case takes place in a Logical System Context.