Found inside â Page 120Such exchanges are called model views, drawing from the notion of a database view. This level of specificity involves identifying the exchanges to be ... Found inside â Page 312We require that a materialized view appear to the user as if it were a virtual view . Our extended notion of serializability , called Matserializability ... Found inside â Page 278Schema views The notion of a logical database view is much interesting in software enginering environment. Only PCTE-ECMA 23 uses this notion, thanks to the ... Found inside â Page 80The basic idea of their approach is to analyze the view definitions at an ... [82] introduce the notion of graph-structured databases along with the ... Found inside â Page 143We begin by dening derivative databases i.e., databases derived from other databases. This notion is necessary to dene equivalence between views of ... Found inside â Page 76These works do not define notions analogous to repairs and consistent ... In the global-as-view approach [74], the global database is defined as a view over ... Found inside â Page 753We will do so by employing so-called exact views; this in contrast with ... the central notions in database modelling is the notion of a database view, ... Found inside â Page 46The benefits that views bring to query processing and optimization in databases are widely known ( 23 ) . The primary aim of this paper is to define a notion of view for multimedia databases , together with a notion of materialization ( or ... Found inside â Page 362As for XML databases, the notion of security views is proposed in [13]. A security view consists of a view XML document and its DTD, and contains no ... Found inside â Page 80In particular, in many database modelling scenarios, the central notions are sequences or streams of data, but rather database schemata and their views. Found inside â Page 295Modelling Database Views with Derived Classes in the UML/OCL-Framework ... A database view closely corresponds to the notion of derived class in UML. Found inside â Page 163the interface in terms of the underlying database, filters out ... In particular, we can look at the traditional database notion of a view to see how it can ... Found inside â Page 59Informally, the idea is to support a notion similar to that of database views, constructed on top of graph databases. However, our constructs go beyond ... Found inside â Page 287A view mechanism, however, could be used to define abstract interfaces to ... In particular, we can look at the traditional database notion of a view ... Found inside â Page 252 Principal Approaches Views , which are well known in the relational model as ... In ( 16 ) , the notion of view is introduced in an objectoriented model . Found inside â Page 4917th International Conference on Extending Database Technology Konstanz, Germany, March 27-31, ... [11], and the Garlic notion of object-centered views [5]. Found inside â Page 119Several policies and methodologies for view definition have been ... relevant portions of relational databases with respect to a notion of context, ... Found inside â Page 17We introduce the notion of canonical database, and show how it is used in testing query containment. For conjunctive queries with arithmetic comparisons, ... Found inside â Page 36One of the central notions in database modeling is the notion of a database view , which closely corresponds to the notion ... We will employ OCL and the notion of derived class as a means to treat database constraints and database views in a ... Found inside â Page 100This formalism also supports horizontal decompositions [12, 18] and notions such as consistency of views. In this paper, we will show that combining the ... Found inside â Page 281The notions of holding and satisfying are deliberately vague (or abstract). ... views are also equivalent to the standard view that a database satisfies ... Found inside â Page xiiiThe system can check, for any transaction made to a database, whether it is ... A classification of views is then obtained that relies on notions such as ... Found inside â Page 325In particular we may apply a batch process to a view that collects for each formal notion referred in the view all the formal notions that occur before it. Found inside â Page 25The previous sections discussed the background of a view, the difference ... instances level in traditional database systems, this notion is no longer ... Found inside â Page 146An important notion in modeling databases is that of a database view. To illustrate this notion, consider the case that we have a class called Emp1 with ... Found inside â Page 315In the following, we present the notions we use in a way close to domain ... The notion of view: A view is a usual notion in relational databases: it is a ... Found inside â Page 9How do the notions of database views and consistency transfer to objectOriented data models? e Protection issues have to be based on the notion of object ... Found inside â Page 165Traditionally, in the database field, this problem is solved by the notions of views and âview-schemasâ applied to a database schema. Found inside â Page 14The notion of view completeness is similar to an assumption that a certain view of the database is closed world [35]. Also, open nulls [14] are actually ... Found inside â Page 201control must be included in the distributed database design so that the cost of ... The notion of snapshot for optimizing view derivation in distributed ... Found inside â Page 18Both of these notions have also been included (and were actually inspired on MINE RULE) in the logical inductive database theory [29]. Pattern views ... Found inside â Page 11The notion of a first - order theory generalizes to the notion of a database view in database logic . ... Since the notion of database view subsumes that of first - order theory , any result obtained using database views gives us , as a special case ... Found inside â Page 330For this purpose, we make use of the following basic notions. â To determine whether the information content of a set of views is sufficient to answer ... Found inside â Page 97We view the two mechanisms as complementary, with queries being more suitable for ... Buneman and Clemons [35] introduced the notion of database alerter, ... Found inside â Page 221Self-maintenance is a notion that can be defined as maintaining views by materializing supplementary data so that the warehouse view can be maintained ... Found inside â Page 100Since the notion of database view subsumes that of first-order theory, ... generalizes to the notion of interpretation of database views in database logic. Found inside â Page 437This view of the form of organization in relational databases as an approximation of ... This notion of retrieval is meant to mirror the low level retrieval ... Found inside â Page 236... of Logic Databases is considered and some research results are presented in which the notion of View Constraints as restriction on a database emerges. Found inside â Page 83This virtual view is considered as abstract by designers using technological ... dependent data recorded in a same database, or in interconnected databases. Found inside â Page 295Modelling Database Views with Derived Classes in the UML / OCL - Framework Hermann Balsters University of Groningen Faculty of Management and ... One of the central notions in database modelling is the notion of a database view . Found inside â Page 46The benefits that views bring to query processing and optimization in databases are widely known [23]. The primary aim of this paper is to define a notion ... Found inside â Page 185Based on our projects we develop in the sequel a novel notion for view towers. This notion extends the notion of media types [20]. Database technology ... Found inside â Page 80In particular, in many database modelling scenarios, the central notions are sequences or streams of data, but rather database schemata and their views. Found inside â Page 61In our investigation, we focus on exact view definitions, and equivalent query rewritings, with the accompanying information-theoretic notion of determinacy ... Found inside â Page 511In particular, integrity constraints can be just first-order axioms if the model- theoretic view is adopted. 2.3 Concrete temporal databases The notion of ... Found inside â Page 10-41However, the need for Views in STEP has become apparent, as experience has been ... The notion of a product view is similar to that of a database view; ... Found inside â Page 461One of the key notions required in designing a greedy algorithm for selection of views is the notion of the âmost beneficialâ view. In the greedy heuristics ... Found inside â Page 36One of the central notions in database modeling is the notion of a database view, which closely corresponds to the notion of derived class in UML. Found insideSuch exchanges are called model views and they are defined by model view definitions (MVDs), drawing from the notion of a database view.
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