The move uses Requirements Interchange Format (ReqIF), which is an Object Modeling Group standard. You can create a ReqIF file and use it to exchange requirements and associated metadata between requirements tools or requirements repositories. This video shows how to use ReqIF to export data from a Rational DOORS database and import it to a target database in Rational DOORS Next Generation.
The video is hosted on YouTube.
Migrating IBM Rational DOORS project data to IBM Rational DOORS Next Generation