A baseline is a read-only version of a module. It captures a moment in time and preserves it until you delete the module.
The baseline includes the history of the module:
- Information about all the attribute definitions and types that have been created, deleted, or edited since the most recent baseline.
- Information about all the objects that have been created, deleted, or edited since the most recent baseline.
- Information about every module session (every time the module has been opened) since it was first created.
Rational® DOORS® stores the history information for each module in a separate file in the database. When you edit a module, Rational DOORS opens its history file. The bigger the history file, the longer it takes to open it.
To improve performance, regularly create baselines of your modules. The history file is removed from the module, and a file that contains the baseline, together with all the history information is created. You can access the history information from the baseline.