Data set naming conventions

Certain IDF commands cause data to be written to or read from files. Since IDF was originally written to run on CMS, the commands are oriented towards the naming conventions used by the CMS file system.

The mapping of the CMS file conventions to z/VSE is:

CMS: Equivalent on z/VSE
fn: z/VSE librarian member name.
ft: DLBL name, which in turn points to the z/VSE data set name
fm: Not used on z/VSE

On z/VSE, you must reference files using DLBL statements (JCL), and libraries using LIBDEF statements.