Hypertext, Databases and Computer Aided Instruction: where is the match?
In this paper, we sum up the results of our works concerning the use of the hypertext concept for Computer Aided Instruction purposes.
First, we present an architecture for a hybrid system, in which hypermedia information can be combined with some directive forms aimed at direct instruction and control in a given field. This architecture enables an Educational Hypermedia software to act sometimes as a learning system, sometimes as a teaching one [1,2].
Next, considering that’ standardization’ is one of the major aspects involved in the evolution of Hypermedia systems , we study a formalization for Educational Hypermedia systems previously defined: ACHE * model. This formalization, based on the Dexter Hypertext Reference model  takes into account the specificities of Educational Hyperdocuments ** (such as dialogue entities or CAI-Links) [3, 4].
Issues in application of the ACHE model are discussed from both the exchange of information point of view and the data storage point of view.
KeywordsEducational Software Security Function Interchange Format Supervision System Storage Layer
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