import type { StringValueNode } from 'graphql/language';
import type { IConvertContext } from '../../IConvertContext';
import type { IConvertSettings } from '../../IConvertSettings';
import type { Util } from '../../Util';
import type { IValueNodeHandlerOutput } from './NodeValueHandlerAdapter';
import { NodeValueHandlerAdapter } from './NodeValueHandlerAdapter';
/**
 * Converts GraphQL strings to RDF string terms, which can have a custom language or datatype.
 */
export declare class NodeValueHandlerString extends NodeValueHandlerAdapter<StringValueNode> {
    constructor(util: Util, settings: IConvertSettings);
    handle(valueNode: StringValueNode, fieldName: string, convertContext: IConvertContext): IValueNodeHandlerOutput;
}