import { TokenScore, BM25Params } from '../types.js';
export declare function prioritizeTokenScores(arrays: TokenScore[][], boost: number, threshold: number | undefined, keywordsCount: number): TokenScore[];
export declare function BM25(tf: number, matchingCount: number, docsCount: number, fieldLength: number, averageFieldLength: number, { k, b, d }: Required<BM25Params>): number;