Queries posed to a mediator need to be translated into a sequence of subqueries to the underlying infomation sources. The translation process can be quite challenging, when integrating a large number of heterogeneous information sources having diverse security requirements. J. Biskup, J. Freitag, Y. Karabulut, and B. Sprick. Query evaluation in an object-oriented multimedia mediator . In any approach to gain information we have to deal with three aspects of information.
Users have to syntactically provide some information about their needs.
Query evaluation in an object-oriented multimedia mediator . No context found. Query Evaluation in an object-oriented multimedia mediator . Springer Verlag, Brisbane, Australia. The main task of the parallel server is firstly to manage the mass data that is stored in the HPQS, and secondly to perform search operations on these mass data items.