import { EN16931UBLValidator } from './en16931.ubl.validator.js';
/**
 * XRechnung-specific validator that extends EN16931 validation
 * Implements additional German CIUS (Core Invoice Usage Specification) rules
 */
export declare class XRechnungValidator extends EN16931UBLValidator {
    /**
     * Validates XRechnung-specific structure requirements
     */
    protected validateStructure(): boolean;
    /**
     * Validates XRechnung-specific business rules
     */
    protected validateBusinessRules(): boolean;
}