Baselines do not include collaboration links to Rational DOORS objects if the links were created and stored only in an external application. For example, IBM® Rational® DOORS® Next Generation and IBM Rational Design Management use link discovery. Links to Rational DOORS are stored only in the application that contains the link source and therefore are not included in baselines of Rational DOORS modules.
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.