FPF Reference

    A.19.SOURCE-SET-SPACE-SUBSTRATE:4.11 - Ordinary and heavier use

    Preface node heading:a-19-source-set-space-substrate-4-11-ordinary-and-heavier-use:24018

    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

    For ordinary use, one short declaration block is enough:

    • one SourceSetFamily;
    • SourceSetRef? when family-level naming alone would be ambiguous;
    • one SearchSpaceRef;
    • one OutcomeSpaceRef;
    • one explicit SpaceRefRelationKind;
    • one explicit relation line;
    • one explicit posture line.

    Use the heavier stack only when one of these is true:

    • several declared source sets are genuinely composed;
    • one derived view must stay recoverable;
    • one interpretive qualifier is materially active;
    • one descriptor-map or distance-definition docking clause is needed to prevent collapse;
    • or the reader would otherwise mistake publication metadata for substrate semantics.

    Last Updated: 2026-06-08 — upstream FPF commit 093d30e8 (github.com/ailev/FPF)