FPF Reference

    A.20:Appendix A — CV Class Gloss (normative)

    Preface node heading:a-20-appendix-a-cv-class-gloss-normative:28732

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    • MechanismUnitsCoherence. Internal unit and scale coherence within the step when quantities, scales, units, or reference planes are actually used; no declarations or translations of units or planes occur in CV.
    • LawSetInvariants. Mechanism-declared invariants hold (e.g., mass or energy balance in a model, determinism under fixed editions).
    • AdmissibilityConditionsSatisfaction. Inputs lie within the windows and guards declared by the mechanism's AdmissibilityConditions; failure yields degrade or abstain per class policy. Minimum declaration (normative): AdmissibilityDecl := { domains: [{name, structureKind ∈ {set, poset}}]+, guards: [predicate_id]*, windows: {Γ_time ∈ {snapshot, interval, policy}}, observables: [signal_id]*, edition: EditionId }. The declaration is published on MVPK as references only; it introduces no arithmetic on faces. Minimal declaration template (normative): AdmissibilityConditions := { Domains[]{var, type, range, units, plane}, Guards[]{predicate, editionRefs}, ObservationWindows[]{Γ selector, freshness window}, ObservableSigns[]{name, detection rule}, Editions{...} } — No unit or plane declaration or translation here; only references. Γ selectors SHALL be explicit.
    • LipschitzBounds for stability claims. Bounded sensitivity under a declared metric, used only when a perturbation, sensitivity, robustness, continuity, safety-envelope, or stability claim changes the CV use. Publication ref shape (normative): LipschitzBoundRef := { boundDerivation ∈ {spectral_norm, CROWN, IBP, rand_smoothing, other}, metric_space: {X: norm_id, Y: norm_id}, bound: value or interval, unitRef?: UnitRef, referencePlaneRef?: ReferencePlaneRef, effective_window: Γ_time(selector), edition: EditionId, certificateRef?: LipschitzCertificateId }. Referenced evidence or certificate value (normative): LipschitzCertificate := { metricId (with units and plane), bound L, boundDerivationId, boundDerivationRef (e.g., spectral estimate or certified robustness bound), validity region (inputs and state), proof sketch or reference }. The bound-derivation technique or its method description MUST be cited; unit reference and plane reference of the metric MUST be explicit; proofs and witness records are referenced; bounds are ref-only at CV; any acceptance action remains GateFit. If the technique itself is relied on as a reusable U.Method, use A.3.1 and A.3.2; A.20 only records the CV-bound reference.
    • TypeDomainRange. Well-typedness and type, domain, and range consistency for the transformation signature; refs point to the governing definitions.
    • ReinterpretationEquivalence (StructuralReinterpretation only). Existence of a correspondence and reversibility witness between source and retarget projections; preservation of ⟨L,P,E⃗,D⟩; no comparator, plane, or unit declaration or translation at CV. Witness (normative): ReinterpWitness or ReinterpretationEquivalenceWitness (see §4.7) with: (i) PathSliceId, PublicationScopeId, (ii) bidirectional mapping (iso or optic) with Put-Get and Get-Put obligations, (iii) commuting squares for adjacent raw transfers, (iv) NoHiddenScalarization assertion when comparable, and (v) definedness region. The witness is PathSlice-local and usable only for idempotence and reversibility within the addressed slice. Any EntityOfConcernRef change SHALL have KindBridge (CL^k) on UTS.

    A.20:Appendix B — LEX discipline (summary)

    Register token classes (Tech) include: TransformationFlowStructure, TransformationFlowMathDescription, OperationalGate, GateProfile, GateCheckKind, GateCheckRef, DecisionLog, FreshnessTicket, FinalizeLaunchValues, SubflowRef, FlowEmbed, SentinelId, PathSliceId, SliceRefresh, VALATA; discriminators use Base__P2W, Base__EvaluatingAndRefreshing; Tech names are ASCII; aliases for Gamma-time rules and plane lexemes, plus CLPlane and Phi, follow E.10. A.20 references these tokens; it does not introduce additional LEX classes. For each published CV check, GateCheckRef.aspect is fixed to ConstraintValidity. MVPK minima for CV faces also include PathId and PathSliceId where slice-local refresh applies through E.18, A.20, and G.11 when refresh wiring is present.

    Last Updated: 2026-06-17 — upstream FPF commit 646b0b9b (github.com/ailev/FPF)