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Introduction Version Information
1-16 User Reference
Version Information
Introduction
As each version of a dataset is created, BIM-EPIC automatically records attributes specific to
that version in the DSN Catalog. The attributes recorded at this level are described in this
section.
The current (most recently created) version is always version 1. Whenever a new version of a
dataset is created, previous versions are incremented automatically. Versions in scratch, open,
or conditionally cataloged status (see below) do not have version numbers.
A generation number is assigned to each generation disk version. It is a nine-character suffix
that is appended to the dataset name (in the VTOC only) as “.G=nnnnnn”, beginning in
position 36 of the dataset name.
Since several versions of a generation dataset can be written on the same disk volume, BIM-
EPIC appends a unique generation number to the dataset name to ensure that the dataset name
in the VTOC is unique.
Although the VSE VTOC name of the dataset includes the generation number, BIM-EPIC
does not consider the generation number to be part of the dataset name. Therefore, do not
include it in your JCL when you want BIM-EPIC to process the dataset under DSN Catalog
control. Specify the dataset name only as it appears in the BIM-EPIC dataset definition.
BIM-EPIC tracks the status of each version. BIM-EPIC status types are:
Active (A) is the default status of an unlocked active version.
Open (O) indicates that close processing did not complete successfully. An open version
cannot be used or scratched until you declare it closed using the Online Manager or
TSIDMNT program.
Conditional Catalog (C) indicates that the version was created with the TESTJOB feature or
a conditional catalog option in the JCL. It is accessible as input only if it is the latest in the
dataset’s chain of versions. In addition, it can only be accessed by a job with the same name
as the job that created it. To make it an active version, declare it closed it using Online
Manager or the TSIDMNT utility.
Open and conditionally cataloged versions have different rules for retention from active
versions. See “Rules for Dataset Retention” in this chapter for details.
Description
Version Number
Generation Number
Version Status
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