====== P2-REQ-16-5-003 ======

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

===== Statement =====

A [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_data_structure_definition|Logical Data Structure Definition]] SHALL describe the structure, meaning, and constraints of an information class at the platform-independent logical level.

===== Source =====

Part 2, Section 16.5: Logical Information Requirements.

===== Rationale =====

Logical Data Structure Definitions establish the platform-independent description of information used throughout the architecture. Separating logical definitions from implementation schemas preserves conceptual meaning while allowing multiple implementation technologies to realize the same logical information structure.

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

This requirement applies to all Logical Data Structure Definitions within the Logical Architecture / PIM.

It applies specifically to:

  * Logical Data Structure Definitions;
  * Logical Information Model;
  * Domain Logical Profiles; and
  * Implementation Profiles.

===== Verification =====

Verification SHALL confirm that each Logical Data Structure Definition describes the structure, meaning, and constraints of an information class.

Verification activities should include review checks confirming that:

  * information structures are explicitly defined;
  * semantic meaning is documented;
  * logical constraints are identified; and
  * implementation technologies do not redefine logical information structures.

===== Traceability =====

This requirement supports traceability between logical information definitions and the implementation representations that realize them.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-5-001]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-5-004]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-5-012]]

Related source section:

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

===== Status =====

Draft

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