/**
 * Parse / serialize SpreadsheetML shared string table (`CT_Sst` / `CT_Rst`).
 *
 * Citations:
 * - ECMA-376-1 §12.3.15 Shared String Table Part; §18.4.8 `si`, §18.4.9 `sst`, §18.4.12 `t`
 * - `CT_Sst`, `CT_Rst` in transitional `sml.xsd`
 * - [MS-OI29500] 2.1.676–678
 *
 * @private
 */
/** Default security ceiling for SST entry count (`.agent/policies/security.md`). */
export declare const DEFAULT_MAX_SHARED_STRING_ENTRIES = 5000000;
/**
 * One SST entry after parse.
 */
export declare type SstEntryXml = {
    readonly kind: 'plain';
    readonly text: string;
    /** Full `<si>...</si>` when original had extra attrs / phonetic / etc. */
    readonly xmlPreserve: string | undefined;
} | {
    readonly kind: 'rich';
    readonly plainFallback: string;
    /** Full original `<si>...</si>` element XML for round-trip. */
    readonly xmlPreserve: string;
};
/**
 * Parsed `sst` model.
 */
export interface SstXmlModel {
    readonly entries: ReadonlyArray<SstEntryXml>;
    /** `sst/@count` when present; otherwise `undefined`. */
    readonly count: number | undefined;
    /** `sst/@uniqueCount` when present; otherwise `undefined`. */
    readonly uniqueCount: number | undefined;
    /** Ordered non-`si` children under `sst` (e.g. `extLst`), full element strings. */
    readonly preserveChildrenXml: ReadonlyArray<string>;
    /** Extra root attribute text excluding count/uniqueCount and xmlns. */
    readonly rootExtraAttrsXml: string;
}
/**
 * Parse sharedStrings part bytes.
 */
export declare function parseSstXml(bytes: Uint8Array, partName: string, options?: {
    readonly maxEntries?: number;
}): SstXmlModel;
/**
 * Serialize SST model to Transitional SpreadsheetML bytes.
 */
export declare function serializeSstXml(model: {
    readonly entries: ReadonlyArray<SstEntryXml>;
    readonly count: number;
    readonly uniqueCount: number;
    readonly preserveChildrenXml?: ReadonlyArray<string>;
    readonly rootExtraAttrsXml?: string;
}, options?: {
    readonly maxEntries?: number;
}): Uint8Array;