fpf.tools
Library / First Principles Framework (FPF) - Core Conceptual Specification
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Source changed 2026-10-03 14:36:52 UTC · snapshot created 2026-10-03 14:38:14 UTC · last check 2026-10-03 14:45:10 UTC

A.19:12.2 - Source-use basis and currentness

A.19 is primarily internal-kernel doctrine, not an external SoTA-import pattern. The accepted FPF basis for U.CharacteristicSpace is the chain of A.17 for U.Characteristic, A.18 for scale and value discipline, C.16 for measurement and coordinate evidence, A.19.UNM for normalization methods, C.29 when a mathematical lens is used beyond local space declaration, and E.24 for ontic-head and slot-relation discipline.

Use G.11 to check source currentness for the named use. Reopen A.19 when a subject pattern changes Characteristic identity, Scale semantics, value-set meaning, subject/input arity, partial-observation discipline, normalization admissibility, comparability, Bridge discipline, mathematical-lens boundary, or ontic slot discipline. Do not reopen A.19 merely because one consumer adds a score table, dashboard, evaluation report, certification interface, or portfolio view that uses the space.