GAIADR1 contains a local copy of the two main tables (gaia_source and tgas_source) from the first data release from the ESA Cornerstone mission Gaia. It is provided for the convenience of users when cross-querying from our infrared (WSA, VSA), optical (OSA) and spectroscopic (GES) public survey data releases. For further details, see the Gaia DR1 online documentation and also the Gaia DR1 data model description.