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Hypermedia, multimedia and hypertext. Definitions and overview
Bornman, Hester | von Solms, S H
Electronic Library. Vol. 11, no. 4-5, pp. 259-268. 1993
In this paper I will discuss definitions of hypermedia, multimedia
and hypertext. Hypertext is the grouping of relevant information
in the form of nodes. These nodes are then connected together
through links. In the case of hypertext the nodes contain text or
graphics. Multimedia is the combining of different media types for
example sound, animation, text, graphics and video for the
presentation of information by making use of computers. Hypermedia
can be viewed as an extension of hypertext and multimedia. It is
based on the concept of hypertext that uses nodes and links in the
structuring of information in the system. In this case the nodes
consists of all the different data types that are mentioned in the
multimedia definition above. The 'node-and-link' concept is used
in organisation of the information in hypermedia systems. The
'book' metaphor is an example of the way these systems are
implemented. This concept is explained and a few advantages and
disadvantages of making use of hypermedia systems are discussed. A
new approach for the development of hypermedia systems, namely the
knowledge-based approach is now looked into. Joel Peing-Ling Loo
proposed this approach because he thought that it is the most
effective way for handling this kind of technology. A
semantic-based hypermedia model is developed in this approach to
formulate solutions for the restrictions in presenting information
authoring, maintenance and retrieval. The knowledge-based
presentation of information includes the use of conventional data
structures. These data structures make use of frames (objects),
slots and the inheritance theory that is also used in expert
systems. Relations develop between the different objects as these
objects are included in the database. Relations can also exist
between frames by means of attributes that belong to the frames.
 Descriptors: Computer applications | Knowledge based systems | Three dimensional
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