1. An interface system for access to the data of a database stored in corresponding storage means ( 1 ), comprising at least one area ( 3 ) for storing the data proper and one area ( 2 ) for storing a data dictionary for the structural definition of this database, the database being accessible through means forming an access interface ( 4 ), characterized in that the means forming the access interface ( 4 ) are associated with a dictionary ( 5 ) of interface definition descriptors, which is accessible through means ( 7, 8 ) for modifying its contents so as to allow a programming of the configuration of the interface forming means by creating, deleting or modifying descriptors in the dictionary ( 5 ) of interface definition descriptors and in that there are provided means ( 6 ) for automatically updating the data dictionary ( 3 ) for the structural definition of the database so as to adapt the latter to the programmed configuration of the means forming the access interface.