Describes concepts used to describe system contexts in the SAF Physical Domain and related concepts.

Concept	Documentation
System Of Interest	An abstract element representing a SOI. Base class for specific kinds of SOIs.
System Context	Specifies the fact that a context for a System of Interest is defined.
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).
Physical Environment	The Physical Environment in the Physical Domain, outside the SOI scope, interacting with the SOI. E.g. air, dirt, sun, road.
Physical System Context	Specifies the fact that a context for a System of Interest is defined on Physical Level.
Physical SOI	Represents the Physical SOI on Physical Level.
Physical Context Element	Abstract element of a System Context on Physical Level, outside the SOI scope, interacting with the SOI.
Physical External System	The Physical External System in the Physical Domain, outside the SOI scope, interacting with the SOI. E.g. power grid, mobile network, fresh water system (in a house).
Logical Environment	A Logical Environment in the Logical Domain, outside the SOI scope, interacting with the SOI. E.g., air, dirt, sun, road.
LENconceptingPEN	Specifies the fact that a logical Environment Entity is a concept for a Physical Environment Entity.
LESconceptingPES	Specifies that the Logical System is a concept for a Physical System.
System Context Element	An abstract element representing a System Context Element. Base class for specific kinds of Context Elements.
System Context Element Role	Specifies the fact that a System Context Element exists in a given System Context.
System SOI Role	Specifies the fact that a System SOI exists in a given System Context.
Logical User	The Logical User is the representation for a human in the Logical Domain, outside the SOI scope, interacting with the SOI.
LURconceptingPUR	Specifies that the Logical user is a concept for a Physical User.
Physical Context Element Role	Specifies the fact that a Physical Context Element exists in a given Physical System Context.
Physical SOI Role	Specifies the fact that a Physical SOI exists in a given Physical System Context.
Physical User	The Physical User is the representation for a human in the physical domain, outside the SOI scope, interacting with the SOI.