Engineering Patterns
Five patterns, each built around one architectural property.
Non-normative
- Companion version
- 1.0
- Maps to COADF Core
- 2.2
- Status
- Current
- Last reviewed
Each pattern states one architectural property and follows it through valid implementation strategies, failure modes, verification, alternative realizations and limitations, independently of any technology.
Probabilistic Boundary
A probabilistic component is bounded and cannot directly become an authoritative domain output.
End-to-End Traceability
One traceable identity connects the relevant steps from intake to the resulting output.
COADF principles: P-4
Executable Fences
A forbidden state prevents the relevant merge, release, deployment or publication.
COADF principles: P-6
Standards Dependency Isolation
External standards, vocabularies, validation services and licensed dependencies do not become inseparable from the domain core.
COADF principles: P-7
Policy as Data
Decision rules are versioned independently of application code, and each decision keeps provenance to the rule version that produced it.
COADF principles: P-8