Event Restricted Temporality (ERT): Definitions, Typing Rule, and Domain Gates — Specification v1.0

This record archives the canonical specification of Event‑Restricted Temporality (ERT), a domain‑of‑applicability framework for temporal predicates in physics. ERT is a framework originated and developed by O. Oye‑Atta that treats time‑talk (t, ∂/∂t, before/after, time‑ordering) as a licensed operation on physical descriptions rather than a universal background assumption. The specification defines the criterion under which temporal predicates are well‑typed, based on an event‑license functional derived from admissible reversal cost, together with a control‑relative robustness threshold separating fragile from robust event‑license. It further introduces eight domain gates (“Eight Doors of Time”) that constrain when and how temporal parametrisation may enter physical description. Structural and retentive descriptions are classified as nontemporal by type, while event‑licensed descriptions admit temporal parametrisation. This document is the authoritative formulation of ERT (ERT‑SPEC‑v1.0) and is intended as a stable, citable reference for applications, extensions, and critiques of the framework as a whole.