====== 11.7 Cross-Plane Implementation Relationships ======

[[fxdemo:04-part:11-phase-0-runtime-plane-realization:start | Go To Phase 0 Runtime Plane Realization ]]

Phase 0 implementation artifacts may support interactions that cross Runtime Plane boundaries.

A cross-plane implementation relationship occurs when an implementation event, message, exception, command, or processing result in one Runtime Plane affects, constrains, records, or triggers behavior in another Runtime Plane.

Examples include:

  * a Health and Observability Plane status report triggers a Control Plane recovery command;
  * a Data Plane validation result triggers a Policy and Release Plane release evaluation;
  * a Policy and Release Plane decision creates an Audit and Provenance Plane record;
  * a Control Plane replay command initiates Audit and Provenance Plane reconstruction;
  * an Audit and Provenance Plane replay result reconstructs selected Data Plane information; and
  * an operational exception appears in Health and Observability records and, when it affects processing outcome, also appears in Audit and Provenance records.

Cross-plane implementation relationships do not collapse Runtime Planes. The implementation must preserve the purpose, traceability, information structures, and review expectations associated with each Plane.

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