Terminology

Term	Context	Meaning
Engine	CORVID	Software which implements Domains, Domain Objects and Domain Messaging.
Server	Engine	An instance of a running Engine.
Domain	Engine, Core	A collection of servers and policies.
Policy	Engine, Core, System, World	A rule about the relationships between Referents from disparate Domains.
Object	Engine	A member of a Domain. Objects can not leave Domains though Referents may.
Message	Engine	Sole method of communication between Objects. The server has its own Object with which to interact with hosted Objects.
User	Engine, Core	An account within a Domain. Objects have User owners.
Agent	Core	A source of Events.
Avatar	System	An Agent within a System motivated by a User or an AI.
Character	System, Setting, World	A constrained Avatar. For example, an agent inhabiting a character might have no out-of-character speech action available to them from within the avatar in question.
Object	System, Dictionary	The target of a Relationship in an Observation.
Observation	CORVID	An observer, a context, a relationship and a degree. Observations are the formalization of statements: Observer says, "Subject had Degree Relationship to Object under Circumstances." Observer, Subject, Object, Relationship, Degree and Circumstances are all parameters of the observation and have functional meanings within the engine.
Question	Observation	A Question is an Observation which has one or more 'unbound variables'.
Referent	CORVID	A parameter of an Observation. The fundamental unit of existence and change in CORVID.
Event	Core, System, World	An Observation in motion