import type { Quad } from '@rdfjs/types';
/**
 * A policy evaluator. Returns a report indicating the result.
 */
export interface Evaluator {
    /**
     * Based on a set of policies, a formal description of the world,
     * and, in the case of access control, an access control,
     * determine whether the usage of data was and is permitted
     * and whether all obligations have been met.
     *
     * @param policy - A Usage Control Policy (represented in RDF).
     * @param request - An Access Control Request (represented in RDF).
     * @param state - The state of the world (represented in RDF).
     *
     * @returns A conformance report
     */
    evaluate: (policy: Quad[], request: Quad[], state: Quad[]) => Promise<Quad[]>;
}