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 the interpretation of an event by a given observer as an attempted transition of a target subject.
Domain
A domain is a sphere of knowledge, activity, or concern selected as subject matter for understanding, modeling, or action.
Effect
An effect is a modeled consequence or obligation established by a semantic decision.
Entity
An entity is an enduring, identifiable subject whose state evolves over time under controlled transitions.
Event
An event is a time-bearing occurrence carrying 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.
Interaction
Interaction names boundary-relative participation among subjects: how observers, processes, entities, or other participants affect, observe, request, notify, answer, share state with, wait for, or synchronize with one another.
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.
Subdomain
A subdomain is a coherent region of a larger domain, distinguished by its subject matter, knowledge, activity, capability, purpose, policy, or strategic value.
Time
Time is the dimension in which occurrences, changes, histories, and behaviors are ordered or compared.
Transition
A transition is a semantic decision relation that determines a possible state evolution for one subject boundary from typed input and explicit observations.
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.