export declare function levenshtein(a: string, b: string): number;
export declare function detectDateFields(row: Record<string, unknown>): string[];
export declare function normalizeRow(raw: Record<string, unknown>, existingTypes: string[], explicitType?: string): {
    type: string;
    properties: Record<string, unknown>;
    file_urls: string[];
    warnings: string[];
};
export declare function inferTypeFromHeaders(row: Record<string, unknown>): string | undefined;
export declare function standardizeType(input: string, existingTypes: string[]): string;
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