import { ReadonlyDataset } from "@opennetwork/rdf-dataset";
import { Literal, Quad } from "@opennetwork/rdf-data-model";
import * as ns from "./namespace";
export interface QuestionQuad extends Quad {
    predicate: typeof ns.defaultMain.questionPredicate;
    object: typeof ns.defaultMain.answerPredicate;
}
export declare function isQuestionQuad(quad: Quad): quad is QuestionQuad;
export interface AnswerQuad extends Quad {
    predicate: typeof ns.defaultMain.answerPredicate;
    object: Literal;
}
export declare function isAnswerQuad(quad: Quad): quad is AnswerQuad;
declare function defaultMain(this: ReadonlyDataset<Quad>): AsyncIterable<ReadonlyDataset>;
export declare const DefaultMainSymbol: unique symbol;
export declare const main: typeof defaultMain & {
    [DefaultMainSymbol]?: typeof ns.defaultMain.defaultMain;
};
export declare function isDefaultMain(fn: typeof defaultMain): fn is typeof defaultMain & {
    [DefaultMainSymbol]: typeof ns.defaultMain.defaultMain;
};
export {};