... Previous: ESO/CDS Data-mining Tool Development Project . ... StarView is the user interface to the Hubble Space Telescope (HST) Data Archive. ... We discuss user interaction with the customizable form, describe the use of Java Foundation Classes in implementing the Model View Controller design pattern, and present design features that allow simple, robust communication with third-party components added at run-time. ... MVC interfaces allow a component to register for data model changes. ...