/**
 * ISO 3166 country/region codes registry
 * This file contains data for validating region subtags against the official registry
 */
/**
 * Map of valid ISO 3166-1 alpha-2 country codes
 * Key: country code, Value: country name
 */
export declare const ISO_3166_REGIONS: Record<string, string>;
/**
 * Map of common incorrect region codes to their correct forms
 * Key: incorrect code, Value: correct code
 */
export declare const REGION_CODE_CORRECTIONS: Record<string, string>;
/**
 * Map of preferred values for region codes
 * According to BCP-47 canonicalization rules
 */
export declare const REGION_PREFERRED_VALUES: Record<string, string>;
/**
 * Checks if a region code is valid according to ISO 3166
 *
 * @param code The region code to validate
 * @returns True if the code is valid, false otherwise
 */
export declare function isValidRegionCode(code: string): boolean;
/**
 * Gets a suggestion for an invalid region code
 *
 * @param code The invalid region code
 * @returns A suggested correction or undefined if no suggestion is available
 */
export declare function getSuggestedRegionCode(code: string): string | undefined;
/**
 * Checks if a region code has a preferred value in the registry
 *
 * @param code The region code to check
 * @returns True if the code has a preferred value, false otherwise
 */
export declare function hasPreferredRegionValue(code: string): boolean;
/**
 * Gets the preferred value for a region code
 *
 * @param code The region code to get the preferred value for
 * @returns The preferred value or the original code if no preferred value exists
 */
export declare function getRegionPreferredValue(code: string): string;