Use prefix + pattern for each ID type. Use N for number fields and DD when you need day-based formats.
Important: Always separate variables with hyphens only (e.g., YYMM-TY-N). Do not use spaces, underscores, or other characters.
| YY | 2-digit year (26) |
| YYYY | 4-digit year (2026) |
| MM | Month (01-12) |
| DD | Day (01-31) |
| TY | Employment type code |
| N | Number sequence |