FPF Reference

    A.19.SOURCE-SET-SPACE-SUBSTRATE:4.8 - Qualifier refs stay substrate-side

    Preface node heading:a-19-source-set-space-substrate-4-8-qualifier-refs-stay-substrate-side:24562

    What this page is

    This is generated FPF reference text from the specification preface or supporting sections. It helps interpret FPF; it is not FPF Reference product documentation.

    Methodology

    Use it to understand how the specification wants to be read, then return to a route, pattern, or work packet for active work. Cite generated IDs only when the wording changes the task decision.

    Content

    OutcomeMapRef, SpaceMetricRef, TransitionRelationRef, and BridgeDistortionNote are admitted as substrate-side qualifier refs.

    Use them when:

    • one OutcomeMapRef or named declared map ref really disciplines the source-to-outcome relation;
    • one metric really disciplines spread, neighborhood, or comparison claims;
    • one TransitionRelationRef really disciplines dynamic coupling or transfer;
    • or one bridge-loss note is the relevant reason the relation is qualified.

    Do not make those interpretive qualifiers the semantic center of the substrate. They help explain the relation; they do not replace the line made explicit by SourceSetFamily, SourceSetRef?, SearchSpaceRef, OutcomeSpaceRef, and the declared relation/posture pair.

    Qualifier semantics are first declared on the substrate side. Later interpretive views may reuse those qualifiers, but they do not become the place where the qualifier is first invented or materially changed.

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