Abstract
This paper presents the hypermedia model SemaLink that faces orientation and maintenance problems in large information networks with a knowledge-based approach. Documents are connected to a formal knowledge-base. By means of semantic queries to this knowledge-base users locate documents effectively that serve as entry points for a further knowledge-based hypermedia navigation. Rule-based virtual structures derive new hypermedia structures automatically. Data consistency is guaranteed by an object-oriented schema. As a generic model SemaLink is suitable for a wide range of applications. To achieve this SemaLink combines multimedia with deductive database systems.