> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trassets.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Field Glossary for the Trassets Data API

> Reference guide to common field names across the Trassets Data API, including entrance, address, floor_area_id, property_id, and pagination cursors.

This glossary defines field names that appear across multiple endpoints in the Trassets Data API. Use it as a quick reference when mapping API responses to your own data models or when designing joins across domains.

| Field                          | Type    | Description                                                                                                                                                                                                |
| ------------------------------ | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `entrance`                     | string  | Street name and house number, e.g. Musterstrasse 12                                                                                                                                                        |
| `address`                      | string  | Comma-separated postal code and city, e.g. 10115, Berlin                                                                                                                                                   |
| `name`                         | string  | Full name as a single field. No separate first or last name is available.                                                                                                                                  |
| `floor_area_id`                | string  | References floor\_area\_id in the property\_structure table                                                                                                                                                |
| `property_id`                  | integer | Unique property identifier; primary join key across all domains                                                                                                                                            |
| `person_id`                    | string  | Identifies a tenant or contact person                                                                                                                                                                      |
| `creditor_id`                  | string  | Identifies a creditor (vendor or service provider)                                                                                                                                                         |
| `booking_date`                 | date    | ISO-8601 date of the ledger booking                                                                                                                                                                        |
| `next_cursor`                  | string  | Opaque cursor for Raw endpoint pagination; null when all rows are fetched                                                                                                                                  |
| `join_key`                     | string  | Bridge key produced by `property_structure`; equals `account_id` for cost-centre nodes or `floor_area_id` for floor-area nodes. Used to join bookings and tenancy data to a specific unit or cost centre.  |
| `floor_area_person_id`         | integer | Composite key identifying a specific tenant in a specific unit. Appears in `Contracts.contract_debits` and `Contracts.contract_ends`.                                                                      |
| `property_id_person_id`        | integer | Composite key identifying a specific tenant at property level, without unit granularity. Appears in `Contracts.contract_debits` and `Contracts.contract_debit_diffs`.                                      |
| `account_id`                   | string  | Ledger account reference. Links `Contracts` debit records to `Accounting`.                                                                                                                                 |
| `contract_id`                  | integer | Contract identifier. Appears in `Contracts.service_contracts` and related contract records.                                                                                                                |
| `controct_prolongation_months` | integer | Extension length in months, in `Contracts.contract_ends`. The field name reflects a spelling irregularity in the underlying source system (`controct`, not `contract`) — not a typo in this documentation. |

<Note>
  Fields prefixed with `sk_` are internal surrogate keys used for joins in the underlying data warehouse. They are not stable identifiers for external use and should not be relied on in your integrations.
</Note>