Realm
Domain Semantics
Domain-level meaning for entities, commands, events, observations, identity, state, time, and change.
Entries
Authority
Authority is the boundary-relative standing by which an observer, role, protocol outcome, or source is accepted as able to make a claim, decision, transition, or effect count for a modeled subject.
Behavior
Behavior is a time-varying value: a trajectory through state space:
Causality
Causality is a dependency relation between events, observations, transitions, decisions, or effects in which one occurrence may have influenced, enabled, required, constrained, or carried information into another.
Command
A command is an observer-relative interpretation of an input event as an attempted transition.
Entity
An entity is an enduring, identifiable subject whose state evolves over time under controlled transitions.
Event
An event is a time-bearing occurrence with a value. It marks, reports, or induces change depending on how it is interpreted by an observer relative to a boundary.
Identity
Identity is what allows a sequence of state observations to be understood as successive versions of the same thing.
Invariant
An invariant is a validity constraint that must hold for a modeled subject, transition, process, relation, or boundary.
Observable
An observable is a probe, projection, measurement, or field accessor that produces an observation from state.
Observation
An **observation** is a contextualized value produced by an observable acting on state. It is the form in which state becomes usable by an observer relative to a boundary.
Observer
An observer is a locus of interpretation. It is the participant, context, or execution locus relative to which values, observations, events, commands, queries, boundaries, and state acquire meaning.
Policy
A policy is a decision rule that guides or constrains interpretation, authorization, routing, coordination, retention, recovery, or execution.
Process
A process is coherent work unfolding over time.
Query
A query is an observer-relative interpretation of an input event as a request to observe, compute, or return information without requesting a modeled semantic state transition.
Relation
A relation is a meaningful connection, dependency, association, correspondence, constraint, derivation, or causal link between semantic subjects.
Shape
A shape is the logical structure expected of a value, observation, state view, event payload, command input, query result, or projection result within a model boundary.
State
A state is the condition or configuration of a subject within a model boundary, modeled as an assignment of values to the subject's relevant dimensions at a time, version, or point in behavior.
Time
Time is the dimension in which occurrences, changes, histories, and behaviors are ordered or compared.
Transition
A transition is the semantic decision relation that determines whether an attempted change is accepted for a subject.
Uncertainty
Uncertainty is multiplicity in the states, histories, causes, outcomes, or interpretations that an observer cannot yet distinguish at a declared boundary.
Value
A **value** is pure structured data. It is the concrete information used to read, write, transmit, compare, validate, transform, or carry state.
Version
A **version** identifies a point in an entity history at which a particular state became current.