C.18.1:4.2 - Fields (conceptual descriptors).

• S — Scale Variables. Minimal set of monotone knobs for the Context: compute (steps/tokens/FLOPs/time/energy), data (size/quality), model capacity (params/branches), iteration budget, freedom‑of‑action (FoA)/environment richness, etc. Declare units under C.16 and bind S to a ScaleWindow. Keep planned budget values with A.15.2; bind dated resource-use accounts to A.15.1, B.1.6, and A.10. Where training/inference trade, name the phase the claim concerns.
• ScaleWindow. Declared range of S values for which behaviour claims hold (editioned). This is distinct from FreshnessWindow used by parity.
• Scale‑Probe. At least two (preferably ≥ 3) parity‑respecting points in S within the ScaleWindow, recorded with replicates/seeds and CI/error bars to support elasticity classification. Pick points via a small factorial or Latin‑hypercube when multiple knobs vary.
• ElasticityClass χ ∈ {rising, knee, flat, declining} — a qualitative class supported by the probe over the declared ScaleWindow. Leave χ unassigned when the observations and their uncertainty do not support a class, and state what remains unresolved. Numeric exponents/fits live in domain annexes, not Core.
• ParityNotes. iso‑scale parity? flag and loss notes if not achieved, plus applicable Bridge, Φ, and Ψ IDs for actual crossings under G.9; penalties affect R only.