SOSA-SCL: Structured Constraint Language for Deterministic Control in LLM Systems

This work introduces the Structured Constraint Language (SCL), a formal language designed to define and encode constraints within the SOSA framework. SCL provides a structured, machine-readable syntax for representing rules, scopes, priorities, and constraint types. To ensure deterministic interpretation, SCL defines closed domains for each constraint field and introduces a constrained functional syntax for rule definition. All constraint expressions are finite, explicitly evaluable, and non-ambiguous. SCL operates as an infrastructural component within the Constraint Enforcement (CE) layer, providing formal constraint representation without executing validation or control logic. This separation ensures modularity, reproducibility, and strict adherence to deterministic output regulation in Large Language Model systems.