====== P4-REQ-21-8-012 ======

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

===== Statement =====

Implementation flows SHALL NOT redefine FX logical interaction patterns.

===== Source =====

Part 4, Section 21.8: Interaction Pattern Realization Requirements.

===== Rationale =====

Implementation flows are technical realizations of interaction patterns defined by the FX Demo Logical Profile. They may introduce implementation-specific sequencing, scripts, configuration, communication mechanisms, or runtime packaging, but they do not define the logical meaning of the interaction.

This constraint preserves separation between Part 3 logical behavior and Part 4 implementation realization.

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

This requirement applies to:

  * implementation processing flows;
  * DDS exchange sequences;
  * scripts;
  * configuration artifacts;
  * runtime participants; and
  * demonstration flows.

===== Verification =====

Verification SHALL confirm that Phase 0 implementation flows do not redefine FX logical interaction patterns.

Verification activities should include review checks confirming that:

  * logical interaction definitions remain governed by Part 3;
  * implementation-specific sequencing does not silently change logical meaning;
  * implementation participants remain mapped to applicable logical responsibilities;
  * supporting scripts and configuration remain implementation concerns; and
  * changes to logical behavior are governed at the applicable logical layer.

===== Traceability =====

This requirement preserves the separation between Part 3 FX logical interaction patterns and their selected Phase 0 implementation realizations.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-8-002]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-8-011]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-2-004]]

Related source section:

  * [[fxdemo:04-part:21-phase-0-implementation-requirements:21-8-interaction-pattern-realization-requirements:start]]

===== Status =====

Draft

----

<WRAP centeralign>

© 2026 Dido Solutions, Inc. and Jackrabbit Consulting, Inc.

</WRAP>