import { SelectedValue } from 'xpath';
import { Maybe } from './util.js';
export declare const namespaceMap: {
    xml: string;
    opf: string;
    dc: string;
    ocf: string;
};
export declare const selectAll: import("xpath").XPathSelect;
export declare const select: (expression: string, node: Node) => Maybe<SelectedValue>;
/**
 * inverse of `namespaceMap`
 * ```
 *  {
 *    'http://www.idpf.org/2007/opf': 'opf',
 *    ...
 *  }
 * ```
 */
export declare const prefixMap: {
    [namespace: string]: string;
};