====== P4-REQ-21-6-010 ======

[[dido:99_annexes:annex-d-requirements:part-04:start| Return to Requirements]]

===== Statement =====

Each IDL and generated type mapping SHALL preserve traceability to the Part 3 FX logical information structure.

===== Source =====

Part 4, Section 21.6: Information Structure Mapping Requirements.

===== Rationale =====

IDL structures and generated types are implementation representations of logical information definitions and must remain connected to those authoritative Part 3 sources.

Preserving traceability allows reviewers to determine why each implementation representation exists and whether it remains consistent with the intended logical meaning.

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

This requirement applies to:

  * IDL structures;
  * generated types;
  * FX logical information structures;
  * mapping metadata; and
  * implementation traceability records.

===== Verification =====

Verification SHALL confirm that each IDL and generated type mapping preserves traceability to its applicable Part 3 FX logical information structure.

Verification activities should include review checks confirming that:

  * the applicable logical information structure is identifiable;
  * mapping records connect IDL and generated types to that source;
  * changes preserve or explicitly update the traceability relationship; and
  * reviewers can navigate from implementation representation to Part 3 definition.

===== Traceability =====

This requirement establishes backward traceability from Phase 0 information representations to their authoritative Part 3 FX logical information structures.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-6-001]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-6-002]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-6-009]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-6-011]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-6-012]]

Related source section:

  * [[fxdemo:04-part:21-phase-0-implementation-requirements:21-6-information-structure-mapping-requirements:start]]

===== Status =====

Draft

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