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

# Data sources and rules

> Where Gabin data comes from, how buildings and companies are linked, and the rules applied to personal data.

Gabin aggregates French public registers and open data. It adds no data about people from other sources.

## Sources

| Data | Source | Publisher |
| - | - | - |
| Companies and establishments | SIRENE | Insee |
| Officers, legal acts, annual accounts | Registre national des entreprises (RNE) | INPI |
| Buildings: footprint, use, age, levels, dwellings, height | Base de données nationale des bâtiments (BDNB), open edition 2026-02 | CSTB |
| Energy performance (DPE) | ADEME energy diagnoses, through the BDNB | ADEME, CSTB |
| Corporate owners | Land files of legal entities (fichiers fonciers, MAJIC) | DGFiP |
| Real-estate transactions | Demandes de valeurs foncières (DVF) | DGFiP |
| Condominiums | Registre national des copropriétés (RNIC) | ANAH |
| Building permits | Sitadel | SDES |
| Addresses and geocoding | Base adresse nationale (BAN) | IGN, DINUM |
| Parcels | Cadastre | DGFiP |
| Zones and boundaries | Communes, IRIS districts, departments | Insee, IGN |

Each source is refreshed on its own schedule. A value that changes in a register changes in Gabin at the next refresh of that source.

## How companies are linked to buildings

A company is linked to a building in two ways:

* **Occupant**: one of its establishments is located in the building. The match uses the establishment address geocoded to the street number, or its position inside the building or on one of its parcels. A position known only at the street or city level never links an establishment to a building.
* **Owner**: the company appears as owner in the land files of legal entities, for the building or its parcels.

A company that occupies a building and looks like a landlord (for example a real-estate rental activity), without appearing in the land files, is returned as a **likely owner** with a score and the signals behind it (`likely_owner`). It is an inference, not a fact from a register.

Above about 100 linked companies, an address is usually a business domiciliation rather than a real occupancy.

## Personal data

Some data concerns people. Gabin publishes only what public registers publish, and no contact data.

* **Officers** are named as in the RNE: first names, last name, usage name, month and year of birth (`birth_month`, `YYYY-MM`, no day), roles and mandate dates.
* **Sole proprietorships** (entrepreneurs individuels) are legal units named after the person: they appear under that registered name, as companies, occupants or likely owners.
* **SIRENE partial diffusion** is respected: for a unit whose owner asked Insee for partial diffusion, Gabin returns no name, no street address (city only), no position and no link to a building, and never links an officer to it.
* **Real-estate transactions** come without the names of buyers or sellers.
* **No email address, phone number or personal address** is exposed, for anyone.

People can object to the publication of their data or ask for corrections at [gabin.ai/opposition](https://gabin.ai/opposition). The privacy policy of the service is at [gabin.ai/confidentialite](https://gabin.ai/confidentialite).

If you store or republish personal data you get from Gabin, you become responsible for that processing under the GDPR: keep only what your use needs, honour objections, and do not use officers' data for unsolicited marketing to individuals without a legal basis.


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