====== P2-REQ-16-5-005 ======

[[dido:99_annexes:annex-d-requirements:part-02:start| Return to Requirements]]

===== Statement =====

A [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_message|Logical Message]] SHALL represent a [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_data_structure_instance|Logical Data Structure Instance]] exchanged through a [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_communication_endpoint|Logical Communication Endpoint]].

===== Source =====

Part 2, Section 16.5: Logical Information Requirements.

===== Rationale =====

Logical Messages represent the primary means by which Logical Nodes exchange information. Defining a Logical Message as a Logical Data Structure Instance exchanged through a Logical Communication Endpoint preserves a clear separation between information, communication, and implementation technologies.

===== Applies To =====

This requirement applies to the Logical Information Model.

It applies specifically to:

  * Logical Messages;
  * Logical Data Structure Instances;
  * Logical Communication Endpoints; and
  * Logical Interaction Patterns.

===== Verification =====

Verification SHALL confirm that each Logical Message represents a Logical Data Structure Instance exchanged through a Logical Communication Endpoint.

Verification activities should include review checks confirming that:

  * Logical Messages are represented as Logical Data Structure Instances;
  * Logical Messages are exchanged through Logical Communication Endpoints;
  * Logical Messages remain platform independent; and
  * implementation technologies do not redefine Logical Messages.

===== Traceability =====

This requirement supports traceability between Logical Messages, Logical Data Structure Instances, Logical Communication Endpoints, and Logical Interaction Patterns.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-4-003]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-5-004]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-5-006]]

Related source section:

  * [[fxdemo:02-part:16-logical-requirements:16-5-logical-information-requirements:start]]

===== Status =====

Draft

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