You modify a message catalog by adding, replacing, and deleting set,
message, and comment records in the source file. This modification is
done by merging two files, an old source file, and the maintenance
file to create a new source file, as shown in Title not available. The old
source file is the catalog you originally created and input to the
GENCAT utility to be formatted. The maintenance file contains
the changes that will be made to the old source file.
You may use one of two methods to merge these files, either by line
numbers or by set and message numbers, to create a new source. Unless
consecutive blocks of a source file require modification, the set and
message number merge method is the easiest.
You may keep changes made to a source during a maintenance merge in a
collision file. Collision files give you the capability to rollback
to the old version of the source file.
After you create a modified source file, you format it
with GENCAT.
The formatted catalog can then be accessed by your application
program. For information about formatting the source file,
refer to "Formatting a Source Catalog" in Chapter 2. For information
about accessing your formatted catalog, refer to Chapter 3.
