Version 1.0 (May, 1995) provided basic access to the Catasto data. Version 1.1 (May, 1996) added a higher resolution version of the Della Catena map, made some slight corrections in the documentation, and made available for general use the ability to do direct SQL queries with the data (previously limited to Brown users). Direct SQL queries permit you to do simple statistical analyses of the data online. Version 1.2 (November, 1999) introduced a new SQL search form necessitated by the termination, by Brown's Computer Information Systems department, of support for Sybase and by the consequent removal of the data to a new MySQL server.  Version 1.3 (September, 2002) made some revisions of the web site formatting and documentation to facilitate comparisons between the Online Catasto and the Online Tratte.