import { IToXmlOptions } from '../options.ts';
import { IElement } from '../util.ts';
import { Value } from '../value.ts';
/**
 * ValueString object.
 */
export declare class ValueString extends Value {
    /**
     * Value type.
     */
    static readonly TYPE = "string";
    /**
     * Tag names.
     */
    static readonly TAG_NAMES: string[];
    /**
     * Value value.
     */
    value: string;
    /**
     * ValueString constructor.
     *
     * @param value The value.
     */
    constructor(value?: string);
    /**
     * @inheritdoc
     */
    fromXmlElement(element: Readonly<IElement>): void;
    /**
     * @inheritdoc
     */
    toXml(options?: Readonly<IToXmlOptions> | null, depth?: number): string;
}