Representation Equivalence and Framework Plugins in the Scalar Temporal Field Ontology

The Scalar Temporal Field Ontology (STFO) is formulated across multiple mathematical representations, including scalar-field actions, elastic temporal congruence dynamics, disformal effective metrics, and information-geometric constructions. This paper establishes that these formulations are not distinct theories or revisions, but representationally equivalent framework plugins acting on a single fixed ontology. Criteria for representation equivalence are defined, invariant ontological content is identified, and common STFO representational layers are classified. This work serves as the canonical interpretive reference for reading, citing, and extending the STFO corpus.