Abstract: We present the first formal algebraic specification of a hypertext reference model. It is based on the well-known Dexter Hypertext Reference Model and includes modifications with respect to the development of hypertext since the WWW came up. Our hypertext model was developed as a product

. In this paper we describe a reference model for adaptive hypermedia applications, called AHAM, which encompasses most features...

This paper discusses issues for the design of a Dexter-based cooperative hypermedia architecture and a specific system, DeVise Hypermedia (DHM), developed from this architecture. The Dexter Hypertext Reference Model [Hala90] was used as basis for designing the architecture. The Dexter model

This paper discusses issues for the design of a Dexter-based cooperative hypermedia architecture and a specific system, DeVise Hypermedia (DHM), developed from this architecture. The Dexter Hypertext Reference Model [Hala90] was used as basis for designing the architecture. The Dexter model

This paper discusses the design and use of a generic com-posite mechanism in the object oriented DEVISE Hypermedia (DHM) development framework. The DHM framework is based on the Dexter Hypertext Reference Model, which introduces a notion of composite to model editors with complex or multiple types

The Dexter Hypertext Reference model is well suited to modelling anchor-based hypermedia systems and static hypermedia structures. But it is less clear that Dexter is adequate for systems whose linking is based on embedded references like the World Wide Web (WWW), nor for modelling the dynamic

Hypermedia applications offer users the impression that there are many meaningful ways to navigate through a large body of information nodes. This rich link structure not only creates orientation problems, it may also be a source of comprehension problems when users follow paths through the information which the author did not foresee. Adaptive techniques have been used by a number of researchers [1, 2, 4, 5, 6, 7, 8, 9, 10, 17, 19, 20, 22] in an attempt to offer guidance through and orientation support for rich link structures. The majority of these adaptive hypermedia systems (AHS) have been used in educational applications. The terminology used in this paper also has an educational "flavor". However, there are some adaptive on-line information systems (or "kiosk"- systems), adaptive information retrieval systems, and other adaptive hypermedia applications.

As a starting point for a hypermedia object model for the DejaVu project, we describe an object-oriented version of the Dexter hypertext reference model. While the original model was formally defined in the Z specification language we will use Object-Z to formalize our hypermedia model. 1

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 layered architecture and thus maintains commonality with other hypermediasystems based

Today's multimedia and hypermedia systems include such a huge amount of data and links, that they should be stored and maintained by a database system. Then a powerful and efficient database schema is needed. The Dexter Hypertext Reference Model offers a widely accepted, powerful modelling