A security model for object-oriented databases

An authorization model for object-oriented databases is developed. This model consists of a set of policies, a structure for authorization rules, and an algorithm to evaluate access requests against the authorization rules. The model is illustrated by a specific database system intended for CAD/CAM (computer-aided design/manufacturing) applications, and incorporates knowledge rules with a database of objects combined through an object-oriented semantic association model (OSAM). The database is composed of objects that include a collection of facts and a collection of relevant rules. All the knowledge manipulation operations can be used to express the rules. Some of these rules could be integrity or security rule, i.e. they could be the basis for a mechanism to enforce integrity or security