import type * as RDF from '@rdfjs/types';
/**
 * A quad transformer can transform a given quad into an array of other quads.
 */
export interface IQuadTransformer {
    /**
     * Transform the given quad into an array of quads.
     * @param quad An RDF quad.
     * @param allowedComponent The quad component on which transformation is allowed.
     *                         If undefined, then all components must be considered.
     */
    transform: (quad: RDF.Quad, allowedComponent?: 'subject' | 'object') => RDF.Quad[];
    /**
     * Called once all quads have been transformed.
     */
    end?: () => void;
}