Hi Steve,

>I'm certainly no expert on this matter, but I think VFP falls down on this point:
>For example, primary key uniqueness is maintained by an index in VFP. There are ways to open tables from outside VFP, without the index, and create duplicate primary keys. Referential integrity can be broken by similar means.


No offense, but that sounds like quibbling to me.

The fact is that all data is held as files. And any file can be reverse engineered and tampered with. So, if I add the proper security so that a table can't be opened without the DBC, then I could call my system an RDBMS?

OK. I'll do that then!