vocabulary:
  title: Axon Framework Vocabulary
  description: Controlled vocabulary for Axon Framework CQRS and event sourcing concepts
  created: "2026-04-19"
  modified: "2026-04-19"
  terms:
    - term: Command
      definition: A message that expresses intent to change application state, handled by a command handler.
      tags:
        - CQRS
        - Messaging
    - term: Event
      definition: A message that represents something that happened in the system, used to update state.
      tags:
        - Event Sourcing
        - Messaging
    - term: Query
      definition: A message that requests data from the system, handled by a query handler.
      tags:
        - CQRS
        - Messaging
    - term: Aggregate
      definition: A domain object that handles commands and produces events, maintaining consistency boundaries.
      tags:
        - CQRS
        - Domain Model
    - term: Event Store
      definition: A persistent storage mechanism that stores all events in sequence, used for event sourcing.
      tags:
        - Event Sourcing
        - Persistence
    - term: Saga
      definition: A long-running business process manager that coordinates multiple aggregates via events and commands.
      tags:
        - Workflow
        - Messaging
    - term: Projection
      definition: A read model derived by processing a stream of events, representing current state for queries.
      tags:
        - CQRS
        - Read Model
    - term: Context
      definition: A logical grouping of event streams and applications in Axon Server.
      tags:
        - Axon Server
    - term: Axon Server
      definition: A message router and event store that serves as the backbone for Axon Framework applications.
      tags:
        - Infrastructure
        - Axon Server
    - term: Tracking Event Processor
      definition: An event processor that reads from a tracking token in the event store for reliable processing.
      tags:
        - Event Sourcing
        - Processing