@misc{Lebiediewa_Swietlana_On, author={Lebiediewa, Swietlana}, howpublished={online}, publisher={Zielona Góra: Uniwersytet Zielonogórski}, language={eng}, abstract={A comparison is made between problem-oriented databases for multistage decision making and general-purpose databases. An exemplary problem-oriented database IDEN for supporting the process of multistage identification is discussed in detail. An equivalence condition for problem-oriented databases is formulated and then the equivalence with respect to data structures and operations is proved for hierarchical, network and relational models of the IDEN database.}, type={artykuł}, title={On the equivalence of problem-oriented databases}, keywords={problem-oriented database, data manipulations language, distributed databases, equivalence of databases}, }