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DBB impact analysis identifies which programs have a build dependency on source files that have changed and are to be rebuilt. Impact analysis also identifies main programs that produce statically linked load modules that have been impacted by included subprograms that have been rebuilt. Both of these types of impact analysis use the changed source file names to query the DBB metadata database to identify impacted programs. An impact analysis gap can occur when a load module contains statically linked objects whose names do not match the source file name that created them.
Beginning in version 2.0.2, DBB impact analysis incorporates build maps (when available) when performing impact queries on the output binary files of a program. These queries use the binary names that are provided by the build map instead of the source file name, thus closing the gap.
For more information on build maps see https://www.ibm.com/docs/en/dbb/2.0?topic=apis-build-maps
This is design phase now and will be GAed in Q1 2024.