DataStage Server Edition refers to the packaging of WebSphere DataStage that has Server Jobs and Sequence Jobs. It is the oldest variant of DataStage with a look and feel the same as DataStage 1.0. DataStage Server Edition has survived right through to the IBM Information Server release as DataStage 8.0.
DataStage Server Edition has been partly superseded by DataStage Enterprise Edition and parallel jobs. IBM continues to provide upgrades and support for the server jobs of server edition however there are no new stages and new functions within server jobs. New functionality is instead being built into the underlying Metadata Server and parallel jobs.