automatic queries

We would like our server to be able to query Ripe automatically to obtain the name of the owner of an IP address. Such a query would occur whenever our server receives an http request from an unknown remote address. We would program the function in Java. Could you point me to a place in your documentation that will show us how to use the Ripe database in this way? Thank you very much. Herb Harrell Herbert M. Harrell Harrell Associates Inc Alexandria, Virginia +44 20 7870 2632