It is, at present, an open question which calls for further research; of whether or not an ecological approach can be used also for general information services for the public. This approach requires an identification of the intentional structure of a set of prototypical user situations, of the structure of the involved task demands, the related reasoning strategies, and query dimensions. Considering the past problems with incompatible databases and retrieval strategies in general information services, an evolutionary approach to such services based on a growing set of carefully selected user situations will probably be fruitful. For further development of the ideas presented in this chapter, readers are referred to Rasmussen, Pejtersen and Goodstein ( 1994).
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