| Units | The bookable units of each property (the entire place, rooms, beds), each with its own permanent ID, so you can map at the grain your PMS uses. |
| ARI | Availability, rates and restrictions per unit and night, kept in step between your PMS and Tatallo. |
| Quotes | The price of a stay as your PMS computes it, for Tatallo to show guests. |
| Reservations | The stays guests book on Tatallo, delivered to your PMS, with their changes and cancellations. |
| Webhooks | Tatallo calling your PMS when something changes, instead of your PMS asking. |
