The tableBASE system is accessed through the application programming interface (API) called TBLBASE. Since tableBASE Version 5, TBLBASE can be used in CICS, Batch, IMS, and VTS operating environments. tableBASE programs that use this stub can be ported from one environment to another without requiring any stub relinking. Of course, programs must continue to conform to the requirements of each execution environment.
The current TBLBASE stub is distinct from the stub of the same name used in Version 5. The TBLBASE stubs previous to Version 6 were held in physically separate libraries—one for each operating environment. With Version 6, one universal TBLBASE stub was introduced for all operating environments.