import type { Item, ValidationRule, ValidationRuleObject } from '../typings';
/**
 * @deprecated
 * This is v2 legacy code from this lib that will only be available via 'urn-lib/legacy' in v4 of this lib
 */
export declare function generateDefaultValidationRules(components: string[]): ValidationRule[];
export declare function validationRuleObjectToArray(rule: ValidationRuleObject | ValidationRule): ValidationRule;
export declare function isRfc2141NidString(str: unknown, strictMode?: boolean): boolean;
export declare function isString(value: unknown): value is string;
export declare function isProtocol(protocol: string, parsed: Item<string, unknown>): boolean;
export declare function isValid(parsed: Item<string, unknown>, propertyName: string, allowZeroLength?: boolean): boolean;
/**
 * @deprecated
 * This is v2 legacy code from this lib that will only be available via 'urn-lib/legacy' in v4 of this lib
 */
export declare function urnObject(protocol: string, customRules: ValidationRule[], allowZeroLength: boolean, parsed: Item<string, unknown>): null | string[];
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