A.17:4.1 - CharacteristicSpace & Change Reasoning (Normative/Clarifying)

R17 - State-space use. When a change model uses a CharacteristicSpace, declare its Characteristics, Scales, units and admitted combinations under A.19. Add topology, distance or another structure when the inference relies on it.

R18 - Allowed changes and state recognition. For a model of change, state the allowed continuations and their conditions through A.3.3. Use a state predicate or checklist when the receiving use needs to recognize a condition. A.2.5 governs the particular case of a condition on an assignment to a system role; a gate or assurance use supplies its own required support.

I7 — Vector interpretation. A U.Coordinate vector may collect multiple coordinates for multi‑Characteristic reasoning; composition into a single Score, if desired, is an explicit new 𝒢 on that vector.