/**
 * Timestamp parsing utilities for ProtoPedia and W3C-DTF formats.
 *
 * @module utils/time/parse
 */
/**
 * Parse ProtoPedia timestamp (JST without explicit timezone offset).
 *
 * ProtoPedia timestamps are JST-based timestamps without explicit timezone offset.
 * Current format: `YYYY-MM-DD HH:MM:SS.0` (space separator, `.0` for zero milliseconds)
 * Example: `2025-11-14 12:03:07.0`
 *
 * ## Fractional Seconds Support
 *
 * Currently, ProtoPedia API outputs `.0` (single digit, no sub-second precision).
 * However, this parser accepts any number of fractional digits to accommodate
 * future API changes:
 *
 * - Current: `2025-10-08 18:03:48.0` (1 digit)
 * - Future possibilities:
 *   - Milliseconds: `2025-10-08 18:03:48.123` (3 digits)
 *   - Microseconds: `2025-10-08 18:03:48.123456` (6 digits)
 *   - Nanoseconds: `2025-10-08 18:03:48.123456789` (9 digits)
 *
 * The regex pattern `\.(\d+)` accepts 1 or more digits to support all these cases,
 * as the underlying Java implementation may begin storing sub-second precision
 * in the database.
 *
 * @param value - String to parse
 * @returns UTC ISO string if valid ProtoPedia timestamp, undefined otherwise
 */
export declare function parseProtoPediaTimestamp(value: string): string | undefined;
/**
 * Parse W3C Date and Time Formats (W3C-DTF) timestamps.
 *
 * Implements W3C-DTF Level 4-6, which are datetime formats with mandatory
 * timezone designator (TZD). This is a strict profile of ISO 8601 designed
 * for web standards.
 *
 * **Specification:** https://www.w3.org/TR/NOTE-datetime
 *
 * ## Supported Formats
 *
 * **Level 4: Complete date plus hours and minutes**
 * - Format: `YYYY-MM-DDThh:mmTZD`
 * - Examples: `2025-11-14T12:03Z`, `2025-11-14T12:03+09:00`
 *
 * **Level 5: Complete date plus hours, minutes and seconds**
 * - Format: `YYYY-MM-DDThh:mm:ssTZD`
 * - Examples: `2025-11-14T12:03:07Z`, `2025-11-14T12:03:07-05:00`
 *
 * **Level 6: Complete date plus hours, minutes, seconds and fractional seconds**
 * - Format: `YYYY-MM-DDThh:mm:ss.sTZD`
 * - Examples: `2025-11-14T12:03:07.123Z`, `2025-11-14T12:03:07.45+09:00`
 * - Fractional seconds: 1 or more digits (no maximum)
 *
 * ## Timezone Designator (TZD)
 *
 * - `Z` or `z`: UTC (Coordinated Universal Time)
 * - `+HH:MM` or `-HH:MM`: Offset from UTC (colon required per W3C-DTF)
 *
 * ## NOT Supported (returns undefined)
 *
 * - W3C-DTF Level 1-3 (year-only, year-month, date-only): `2025`, `2025-11`, `2025-11-14`
 * - Timestamps without TZD: `2025-11-14T12:03:07` (timezone-dependent)
 * - Offset without colon: `2025-11-14T12:03:07+0900` (not W3C-DTF compliant)
 * - Other ISO 8601 variants (week dates, ordinal dates, basic format)
 *
 * @param value - String to parse
 * @returns UTC ISO string if valid W3C-DTF Level 4-6, undefined otherwise
 *
 * @example
 * ```typescript
 * parseW3cDtfTimestamp('2025-11-14T12:03Z')
 * // => '2025-11-14T12:03:00.000Z'
 *
 * parseW3cDtfTimestamp('2025-11-14T12:03:07+09:00')
 * // => '2025-11-14T03:03:07.000Z'
 *
 * parseW3cDtfTimestamp('2025-11-14T12:03:07.123Z')
 * // => '2025-11-14T12:03:07.123Z'
 *
 * parseW3cDtfTimestamp('2025-11-14T12:03:07')
 * // => undefined (no TZD)
 *
 * parseW3cDtfTimestamp('2025-11-14')
 * // => undefined (date-only, Level 3)
 * ```
 */
export declare function parseW3cDtfTimestamp(value: string): string | undefined;
//# sourceMappingURL=parser.d.ts.map