Ontological Foundations of State Sovereignty

State sovereignty plays a foundational role in international law and global governance, yet existing data representations treat it as an intrinsic and often binary property of states, obscuring disagreement, provenance, and normative structure. This paper presents first steps toward an ontological foundation for modeling state sovereignty that accommodates contested claims while preserving logical coherence. We characterize sovereignty as a role borne by states, grounded in normative expectations concerning authority, independence, and recognition, rather than as a purely empirical attribute. Drawing on international legal theory and United Nations practice, we distinguish justificatory principles such as self-determination from institutional mechanisms of validation, including bilateral and multilateral recognition. We identify three core features of sovereignty-sufficient internal authority, sufficient external independence, and recognition-and show how each is best understood normatively. To support formal representation, we introduce a lightweight structure linking sovereignty assertions to explicit acts of recognition and public documentation. This approach enables the representation of conflicting sovereignty claims without contradiction and allows differences in inferential weight among recognitions to be preserved. The proposed framework supports ontology-driven integration of geopolitical data, enabling transparent reasoning over sovereignty claims, their sources, and their practical significance in international contexts.