Specification Runtime Layer Storage Layer Within - Component Layer

In this paper, we describe the design and implementation of a hypermedia system that has the following characteristics. First, being designed according to the Dexter hypertext reference model, it has a lay-ered architecture and thus maintains commonality with other hypermedia systems based on the Dexter model. Second, being designed based on the MHEG standard, it has data structures that are inherently suitable for data interchange and synchronization. Third, adopting the MIME protocol, it provides mul-timedia mail services. Finally, being built on top of an object-oriented DBMS, it makes it easy to represent Dexter and MHEG models and also provides eecient storage and search capabilities. The contribution of this paper is combining these characteristics to build an integrated hypermedia system reeecting reference architectures and international standard eeorts.