/**
 * Matching utilities for IAB taxonomy mapping
 */
export interface IAB2Item {
    code: string;
    label: string;
}
export interface IAB3Item {
    id: string;
    label: string;
    path?: string[];
    scd?: boolean;
}
export type SynonymsMap = Record<string, string[]>;
/**
 * Build alias index from IAB 2.x catalog and synonyms
 */
export declare function buildAliasIndex(catalog: IAB2Item[], synonyms: SynonymsMap): Map<string, string>;
/**
 * Build label maps from IAB 3.x catalog and synonyms
 */
export declare function buildLabelMaps(iab3: IAB3Item[], synonyms3x: SynonymsMap): {
    labels: string[];
    labelToId: Map<string, string>;
};
/**
 * Fuzzy multi-match using rapidfuzz-like scoring
 */
export declare function fuzzyMulti(query: string, choices: string[], topK?: number, cut?: number): Array<[string, number]>;
/**
 * Simple TF-IDF based retrieval
 */
export declare class TFIDFIndex {
    private texts;
    private vocabulary;
    private idf;
    private docVectors;
    constructor(texts: string[]);
    private tokenize;
    private build;
    private cosineSimilarity;
    search(query: string, topK?: number, cut?: number): Array<[string, number]>;
}