/**
 * Term serialization utilities
 *
 * - Subject, Predicate, Graph: use n3's termToId/termFromId
 * - Object: use fpstring encoding for numeric literals (sortable)
 */
import type { Quad } from '@rdfjs/types';
export declare const termToId: (term: any) => string;
export declare const termFromId: (id: string) => any;
export declare const NUMERIC_TYPES: Set<string>;
export declare const DATETIME_TYPE = "http://www.w3.org/2001/XMLSchema#dateTime";
/**
 * Encode a number to a sortable string (fpstring format)
 * String comparison of encoded values preserves numeric ordering
 */
export declare function fpEncode(stringOrNumber: string | number): string;
export declare const LEGACY_SEP = "\0";
export declare const SEP = "\u001F";
export declare function isSerializedNumericLiteral(str: string): boolean;
export declare function isSerializedDateTimeLiteral(str: string): boolean;
export declare function isSerializedObjectValue(str: string): boolean;
/**
 * Serialize object term with fpstring encoding for numeric literals
 *
 * Format for numeric literals:
 *   N<SEP><fpstring><SEP><datatype><SEP><original_value>
 *
 * Format for dateTime:
 *   D<SEP><fpstring><SEP><original_value>
 *
 * Other terms use n3 format
 */
export declare function serializeObject(term: any): string;
/**
 * Deserialize object from storage format
 */
export declare function deserializeObject(str: string): any;
/**
 * Serialize a Quad to row data for database storage
 */
export declare function quadToRow(quad: Quad, vector?: number[]): {
    graph: string;
    subject: string;
    predicate: string;
    object: string;
    vector: string | null;
};
/**
 * Deserialize row data to Quad
 */
export declare function rowToQuad(row: {
    graph: string;
    subject: string;
    predicate: string;
    object: string;
}): Quad;
/**
 * Parse vector from JSON string
 */
export declare function parseVector(vectorStr: string | null): number[] | undefined;