Logical Event [Dido Solutions, Inc Wiki]

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====== Logical Event ======

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===== Discussion =====

A Logical Event represents a Logical Data Structure Instance that reports an occurrence, observation, state change, decision, derived result, or other fact relevant to the architecture.

A Logical Event reports that something occurred or that a Logical Node observed, produced, derived, decided, or changed something. It does not instruct another Node to act. Commands express intended action; events report occurrence or result.

Logical Events support distributed processing by allowing Logical Nodes to communicate changes, observations, and results without requiring hidden coupling between producers and consumers.

===== Definition =====

//Logical Data Structure Instance reporting an occurrence, observation, state change, decision, or result.//

===== Source =====

Specialization of Data Structure Instance from Part 1, Section 7.8; generalised from domain-event and data-plane material in the original FX Demo Reference Architecture.

===== Note =====

A Logical Event is not an event-streaming technology or event-bus implementation. Implementation profiles realize events through selected communication mechanisms.

===== Example =====

A transaction-received event reports that a Transaction Intake Node received a candidate transaction record.

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