export declare function combinations1(keys: string[]): string[];
export declare function combinations2(keys: string[]): string[];
export declare const CredKeywordsEndsWith: string[];
export declare const CredKeywordsEquals: string[];
export interface SplitterToken {
    type: "splitter";
    token: string;
}
export interface FeatureToken {
    type: "feature";
    token: string;
    vector?: number[];
    label?: number;
    predict?: number;
}
export type Token = SplitterToken | FeatureToken;
export declare function tokenize(input: string): Token[];
export declare function extractFeatures(text: string): Token[];
//# sourceMappingURL=feature.d.ts.map