
BIM-EPIC Dataset Definitions (EDDs) Introduction
Chapter 1. Introduction 1-9
BIM-EPIC Dataset Definitions (EDDs)
Introduction
BIM-EPIC uses the dataset name in the DSN Catalog to identify a dataset as controlled. Each
time a controlled dataset is opened, BIM-EPIC participates in processing.
The rules for dataset naming are:
• Dataset names can be up to 44 characters long, except for generation datasets (see
below), whose names are limited to 35 characters.
Special considerations apply to tape datasets that belong to a multi-dataset group. See “Prime
Dataset Name” under “EDD Tape Information” in this chapter.
You can record one 30-character comment with any BIM-EPIC dataset definition. Comments
provide additional documentation for the dataset and are printed in BIM-EPIC reports.
Passwords provide protection against unauthorized use of RELEASE and UNLOCK on this
dataset and its versions. RELEASE and UNLOCK are described in Chapters 2 and 3.
Entering a password does not lock, release, or unlock the dataset.
Data encryption encodes tape datasets as they are written. They are decoded only when they
are read under the control of the same DSN Catalog that was used to write them. Data
encryption can be used to prevent tape datasets from being read at external locations. It
provides no protection against unauthorized internal use.
Entering an encryption password for a dataset invokes data encryption for each tape version
created. You do not have to remember this password.
The encryption password and the dataset password (above) function independently of each
other. You can use both if you wish.
Encrypted dataset versions must not be deleted from the DSN Catalog. Once a version is
deleted, it cannot be decoded and is unreadable. Furthermore the encryption password cannot
be added, changed, or deleted once the dataset is cataloged.
System ID and User ID assist in grouping tape datasets for reporting and scratching purposes.
Each can contain any two-character code that is significant to you and your installation. There
Dataset Name
Comment
Passwords
Encryption
Password
WARNING!
User ID and System
ID
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