21.   The base courses cover GIS principles, including relational database methods and elements of spatial analysis.

22.   RDBI The Relational Database Interface product allows data held by LIFESPAN to be transferred to a relational database where it may then be queried by users.

23.   The facilities of the relational database may be used by LIFESPAN users to perform complex queries on transferred LIFESPAN information and produce customised reports.

24.   This User Guide describes the operation of LIFESPAN RDBI and provides details required to access transferred LIFESPAN information within the chosen relational database.

25.   It is also assumed that the reader is familiar with relational database technology and the concepts and terminology therein.

26.   The detailed operation of LIFESPAN RDBI varies according to the relational database used.

27.   This section also discusses creating a suitable relational database to accommodate LIFESPAN information and tuning it to improve the performance of queries.

28.   LIFESPAN RDBI allows the LIFESPAN Manager to transfer selected information from LIFESPAN into a relational database.

29.   Once in the relational database, access to LIFESPAN information is controlled by the same security rules as imposed by LIFESPAN itself.

30.   Specified users must be LIFESPAN users and must also be registered relational database users.