47. The system of claim 28, wherein the directory services repository component includes an effective class, the relational database language statement identifies a table, and the drive and API together map the effective class to the table.
47. The system of claim 28, wherein the directory services repository component includes an effective class, the relational database language statement identifies a table, and the drive and API together map the effective class to the table. 49. The system of claim 47, wherein the driver and the API allow an application program to discover the number of rows of the table by visiting each object, if any, which is an instance of the effective class, until a "no more data" indication is returned because each object, if any, has been accessed.