# Field Contracts

## XML structure

Root: `/RES_DETAIL`

Reservation sequence:

`/RES_DETAIL/LIST_G_GROUP_BY1/G_GROUP_BY1/LIST_G_RESERVATION/G_RESERVATION`

| Reservation source | Daily field |
|---|---|
| `ADULTS` | `ADULTS` |
| `BLOCK_CODE` | `BLOCK_CODE` |
| `CF_CHILDREN` | `CHILDREN` |
| `COMPANY_NAME` | `COMPANY_NAME` |
| `CONFIRMATION_NO` | `CONFIRMATION_NO` |
| `DISP_ROOM_NO` | `DISP_ROOM_NO` |
| `EFFECTIVE_RATE_AMOUNT` | `EFFECTIVE_RATE_AMOUNT` |
| `FULL_NAME` | `FULL_NAME` |
| `LIST_G_COMMENT_RESV_NAME_ID/G_COMMENT_RESV_NAME_ID/RES_COMMENT` | `RES_COMMENT` |
| `LIST_G_DEPT_ID/G_DEPT_ID/TRACE_TEXT` | `TRACE_TEXT` |
| `NO_OF_ROOMS` | `NO_OF_ROOMS` |
| `PRODUCTS` | `PRODUCTS` |
| `RATE_CODE` | `RATE_CODE` |
| `ROOM_CATEGORY_LABEL` | `ROOM_CATEGORY_LABEL` |
| `TRUNC_BEGIN` | `ARRIVAL` |
| `TRUNC_END` | `DEPARTURE` |
| computed | `NIGHTS` |
| approved zero-price exception or price reference | `REAL PRICE` |
| computed `REAL PRICE * NO_OF_ROOMS * NIGHTS` | `TOTAL PRICE` |

The group business-date candidates are `GROUPBY1_SORT_COL` (`YYYYMMDD`) and `GROUPBY1_COL` (`DD-MM-YY`). Every retained reservation `TRUNC_BEGIN` must equal that business date.

For direct XML processing, `source_sequence` is the one-based `G_RESERVATION` order and `source_location` is `reservation[N]`. Because XML is not an Excel source, `source_worksheet` and `source_row_no` are both null. The deterministic channel destination is stored separately as `channel_key`, including in daily mode where no monthly workbook is created.

The structured Group Code comes only from the selected `RES_COMMENT`:

```text
group_code_key = upper(trim(RES_COMMENT))
```

When the trimmed comment is empty, `group_code_key` is null and `booking_source_match_status` is `missing_group_code`. Never substitute `BLOCK_CODE` or another XML value.

## Daily XLSX exact columns

1. `BLOCK_CODE`
2. `ADULTS`
3. `CHILDREN`
4. `COMPANY_NAME`
5. `CONFIRMATION_NO`
6. `DISP_ROOM_NO`
7. `EFFECTIVE_RATE_AMOUNT`
8. `FULL_NAME`
9. `RES_COMMENT`
10. `TRACE_TEXT`
11. `NO_OF_ROOMS`
12. `PRODUCTS`
13. `RATE_CODE`
14. `ROOM_CATEGORY_LABEL`
15. `ARRIVAL`
16. `DEPARTURE`
17. `NIGHTS`
18. `REAL PRICE`
19. `TOTAL PRICE`

## Monthly channel XLSX exact columns

Every ordinary monthly worksheet has exactly 19 columns:

1. `ARRIVAL`
2. `DEPARTURE`
3. `NIGHTS`
4. `ADULTS`
5. `CHILDREN`
6. `BLOCK_CODE`
7. `NO_OF_ROOMS`
8. `COMPANY_NAME`
9. `CONFIRMATION_NO`
10. `DISP_ROOM_NO`
11. `RATE_AMOUNT`
12. `FULL_NAME`
13. `RES_COMMENT`
14. `TRACE_TEXT`
15. `PRODUCTS`
16. `RATE_CODE`
17. `ROOM_CATEGORY_LABEL`
18. `REAL PRICE`
19. `TOTAL PRICE`

The fixed `DY-AI-Easy-KB` worksheet has exactly the same first 19 columns plus:

20. `KB（100/晚/间）`

Map daily `EFFECTIVE_RATE_AMOUNT` to monthly `RATE_AMOUNT`. Map all other monthly fields, including `REAL PRICE` and `TOTAL PRICE`, by field name rather than by the daily column index. In both reports, enforce `TOTAL PRICE = REAL PRICE * NO_OF_ROOMS * NIGHTS`. On `DY-AI-Easy-KB`, compute `KB（100/晚/间） = NO_OF_ROOMS * 100`; do not multiply KB by `NIGHTS` and do not add it to `TOTAL PRICE`. Store all derived values as static numbers, including numeric zeros produced by the approved company-plus-rate-code exception.

The Finance payload uses the same named values without reopening either workbook:

- `EFFECTIVE_RATE_AMOUNT` / monthly `RATE_AMOUNT` → `effective_rate_amount`
- `ROOM_CATEGORY_LABEL` → `room_category_label`
- `REAL PRICE` → `real_price`
- `TOTAL PRICE` → `total_price`
- `KB（100/晚/间）` → `kb_amount`
- destination worksheet → `channel_key`

## Required retained-reservation values

`RATE_CODE`, `COMPANY_NAME`, `CONFIRMATION_NO`, `DISP_ROOM_NO`, `EFFECTIVE_RATE_AMOUNT`, `FULL_NAME`, `ADULTS`, `CF_CHILDREN`, `NO_OF_ROOMS`, `ARRIVAL`, and `DEPARTURE` must be present and valid after whitelist filtering. Adults and children must be non-negative, room count must be positive, the effective rate amount must be non-negative, and departure must not be earlier than arrival. Same-day arrival and departure is valid and produces `NIGHTS = 0`. `BLOCK_CODE`, `PRODUCTS`, `ROOM_CATEGORY_LABEL`, `RES_COMMENT`, and `TRACE_TEXT` may be blank.

The complete Finance JSON field list and nullability rules are authoritative in [structured-result.schema.json](structured-result.schema.json); database-adapter semantics are in [structured-output.md](structured-output.md).