Notes

2 A commercial DBMS does not imply a general-purpose DBMS. It means that it can be packaged and sold to other people. If a MLS DBMS has been developed to provide specific security functions that customers need, and the customer is willing to be restricted to that set of functions and use the same hardware and support software, then it can be sold as a product. It is then a commercial DBMS. The six commercial DBMSs that have been implemented with the Trusted Subject architecture are all different from each other, as they have been developed with different security policies for different hardware and software environments.