export interface OoxmlRelationship {
    id: string;
    target: string;
    type: string;
    targetMode?: string;
}
export declare class OoxmlPackage {
    private readonly zip;
    private readonly textCache;
    private constructor();
    static load(buffer: ArrayBuffer): Promise<OoxmlPackage>;
    has(partPath: string): boolean;
    paths(prefix: string): string[];
    text(partPath: string): Promise<string>;
    xml(partPath: string): Promise<Document>;
    bytes(partPath: string): Promise<Uint8Array>;
    relationships(sourcePart: string): Promise<Map<string, OoxmlRelationship>>;
}
export declare function parseXml(source: string, label?: string): Document;
/**
 * Checks raw XML for selected element names before paying the cost of a full
 * DOM tree. False positives are safe because they only select the slower
 * parser path; the tag boundary prevents cell values and longer tag names
 * from selecting it accidentally.
 */
export declare function xmlContainsAnyElement(source: string, localNames: readonly string[]): boolean;
export declare function attribute(element: Element, name: string): string | null;
export declare function xmlNamespacePrefix(element: Element, namespace: string | null): string | null;
export declare function directChildren(parent: ParentNode, localName?: string): Element[];
export declare function directChild(parent: ParentNode, localName: string): Element | undefined;
export declare function descendants(parent: ParentNode, localName: string): Element[];
export declare function firstDescendant(parent: ParentNode | null | undefined, localName: string): Element | undefined;
export declare function childPath(parent: ParentNode | null | undefined, ...localNames: string[]): Element | undefined;
export declare function resolvePartTarget(sourcePart: string, target: string): string;
export declare function contentTypeForPart(partPath: string): string;
export declare function bytesToDataUrl(bytes: Uint8Array, contentType: string): string;