import type { ParsedNamespaceKey } from '../types/translation.types.js';
/**
 * Namespace parsing utilities for translation keys
 * Supports patterns like: 'common:welcome', 'user.profile.name', 'errors:validation.required'
 */
/**
 * Parse namespace from translation key
 * Supports: 'namespace:key' pattern
 * Future: Could support other patterns like 'namespace.key' or 'namespace/key'
 *
 * @param key - Translation key (e.g., 'common:welcome' or 'welcome')
 * @returns Parsed namespace information
 */
export declare function parseNamespaceKey(key: string): ParsedNamespaceKey;
/**
 * Create a full namespaced key
 *
 * @param key - Clean translation key
 * @param namespace - Namespace to prepend
 * @returns Namespaced key (e.g., 'common:welcome')
 */
export declare function createNamespacedKey(key: string, namespace?: string): string;
/**
 * Validate namespace format
 *
 * @param namespace - Namespace to validate
 * @returns Whether namespace is valid
 */
export declare function isValidNamespace(namespace: string): boolean;
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