MDConnect for DOORS contributes to IBM Rational® Software Modeler and Architect® Traceability and impact analysis tools. If means if a UML model element has outgoings links to DOORS requirements, these links will be considered during the UML impact analysis computation. Such DOORS Requirements will be displayed as specifications of the UML element.
You are invited to refer to IBM Rational Architect Design and Modeling documentation for more information about traceability and impact analysis.