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Information × Registration Number 0310U002331, 0109U002838 , R & D reports Title Modelling of complex information computer systems. Development and introduction of modern information technologies popup.stage_title Вивчення стану дослідження в галузі ненормалізованих відношень та моделювання сховищ даних. Постановка задач автоматизації. Побудова логічних інформаційних моделей. Head Hryhorovych Viktor Hennadiyovych, Registration Date 05-03-2010 Organization Drohobych Ivan Franko State Pedagogical University popup.description2 There are analyzed history, main conceptions and trends of development of nested relations. There are examined Verso model and relational operations upon nested relations. The authors also propose the extension of Entity-Relationship model for cases of nested entities. The basic concepts and descriptions of the partitioned normal form are examined for the nested relations, the methods of restructuring of PNF-relations are described, the questions of optimization of restructuring and diminishing of losses of information are examined at restructuring nested relations. To sum it up the model of Verso and the partitioned normal form are compared. There are analyzed the data storage models, they substantiate the advantages of Partial Normalized Storage Model, describe ASSIGN-F algorithm of giving of frequency to the nodes and edges of the scheme tree. There are examined the methods of calculating of the scheme tree value, there is described the GREEDY-MERGE algorithm of the optimum receiving of the tree scheme. There are briefly characterized means of the usage nested relations processing in the industrial DBMS. The usage and the long-term directions of researches of nested relations are denoted. There are analyzed the data which are studied by a district therapist. There are examined all documents and reports which exist in the subject area and it is proved that nested relations characterize the subject area the most adequately. Product Description popup.authors Білик Ігор Степанович Григорович Андрій Геннадійович Григорович Віктор Геннадійович Карпин Дмитро Степанович Нікольський Юрій Володимирович Наум Олег Миколайович Пігур-Пастернак Ольга Миколаївна Пасічник Володимир Володимирович Ришковець Юрій Володимирович Ших Надія Василівна popup.nrat_date 2020-04-02 Close