The expertise group on Databases and Hypermedia (DH) studies basic technologies that are used to build modern information systems: databases, to store and manage information, and hypermedia, to provide access to the information. Since about 1996 the expertise group focuses on adaptive interfaces for multimedia information disclosure. Almost all information sources contain a wealth of information of which each user only wishes to view a small part. Adaptation, or automatic personalisation, must ensure that each user is guided (automatically) to the part that is relevant to him/her. Adaptive hypermedia is studied at the conceptual and the practical level: the former is done through the study of the Adaptive Hypermedia Application Model (AHAM), the latter through the development of the Adaptive Hypermedia Architecture (AHA), a general-purpose web-based adaptive hypermedia system. The DH group is headed by Prof.dr. P.M.E. De Bra.