Ontological Structure and Canonical Synthesis of NUVO Scalar Geometry

The NUVO framework has produced a sequence of peer-reviewed results spanning scalar-modulated spacetime geometry, loop-based matter structure, quantization from coherence and closure conditions, gauge correspondence, and finite saturation phenomena. These developments were largely results-driven, with ontological language evolving alongside formal derivations. This paper provides a consolidated synthesis of those results and presents a canonical clarification of NUVO ontology centered on the Maintaining Attribute of Spacetime (MAST), its globally conserved quantitative measure (sinertia), and the scalar modulation field $\lambda \left(x\right)$ as the local availability of that maintaining capacity. The clarification replaces earlier heuristic “above/under substrate” terminology with a single-substrate spacetime ontology possessing dual functional structure: geometric response and finite maintaining capacity. No published equations, derivations, or correspondence limits are modified. Instead, the work stabilizes interpretation, re-expresses depletion and saturation phenomena as natural consequences of finite maintaining capacity, and establishes a minimal and durable ontological foundation for future peer-reviewed development within the NUVO program. The contribution of this work is foundational and structural rather than phenomenological. No new dynamical equations, coupling terms, or empirical predictions are introduced. Instead, the paper articulates admissibility, conservation, and scope constraints within the published NUVO framework, clarifying what the theory does and does not claim.