Validate the library

Z Data Tools allows users to enter a copybook library name and member name on many panels. By means of HFMCRAEX Z Data Tools will allow multiple types of copybook libraries without having to specify the type.

The exit must be able to take a library name passed to it and determine whether it is a library which the exit supports. The possible results are:

  1. Yes: the exit supports this library.
  2. No: the exit does not support this library. Z Data Tools should try other access methods (for example, CA-Panvalet or PDS I/O) but should not use the exit to access this data set.
  3. Unknown: the exit was unable to access the library for various reasons (for example, data set in use or security violation).