Unit 1, Section 8: Application Program View and Linkage Editor

This video describes how applications can be allowed access to only certain segments in a database. The PCB view of the data can be restricted to just those sensitive segments that the program needs to process. Therefore, the PCB can be utilized as a means of hiding the fact that there are additional (possibly new) segments in the database that the application is unaware of. This video also covers how calls are standardized from programs written in different languages by using the Language Interface Module, DFSLI000. All IMS programs must have this re-enterable module linked into their load module.