bdfg1m0bGeneral Information


TPFDF Product Overview

The TPFDF product is an interface between application programs that use TPFDF macros and functions to request information from a database and the system software that physically accesses the data. It provides a uniform method for designing data layouts and writing application programs to access and read information maintained in the TPF or ALCS database.

Figure 1 shows the relative position of the TPFDF product in a TPF or ALCS operating environment.

Figure 1. TPFDF Application Programs in TPF or ALCS Operating Environments