CDP - Why Declarative Systems May Require a Declarative Interaction Language

If a system declares its structure, its data, and its behaviour completely — can it be interacted with completely through a single declarative language? This paper examines a property that appears to follow from the five CDP axioms but was not named in the original formulation: unified declarative interactability. It argues that a fully declared system is, by consequence, a fully queryable system — not just its data, but its structure and its behaviour. The paper introduces the concept of a Semantic Declarative Query Language (SDQL) as one possible realisation, without defining its syntax. Companion paper to "CDP — Five Core Axioms and Why It May Constitute a New Software Paradigm."