This section provides introductory information on how MSS uses the following types of file: Project files, System catalog
files, User catalog files, Catalog files, Data set files, and Spool files
Catalog Files MSS uses a catalog file to hold information about the data sets needed for the JCL jobs that run in an enterprise server.
You specify the name and location of the catalog file when you configure an enterprise server for JCL. If the catalog file
does not exist, MSS creates it when the enterprise server starts.