User-role based security, URBS, is a technique for characterizing database security that takes the responsibilities of individuals into consideration when determining the security requirements of an application. In pr...
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An earlier paper by Jajodia and Kogan [5] introduced an approach for building multilevel secure object-oriented database systems based on a secure message filtering mechanism. Under this approach each object has a uni...
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The object Flow Model (OFM) has been developed as a conceptual modeling language (CML) for object-driven (i.e. datadriven, object-oriented) applications. The model includes an object-oriented database that provides bo...
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For distributed computing environments, required for computer integrated manufacturing and other engineering applications, it is most important to support the sharing and exchange of complex objects among cooperating ...
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ISBN:
(纸本)0818637706
For distributed computing environments, required for computer integrated manufacturing and other engineering applications, it is most important to support the sharing and exchange of complex objects among cooperating sites, while preserving their autonomy. Specification of complex objects and their object boundaries in a federated database is described in this paper. Each database, as well as the entire federation, is modeled as a collection of related objects. Complex objects are defined as subgraphs of the entire objectbase and are specified by a root object, and a collection of paths. A complex object can be distributed over several sites. A method is described to ensure referential integrity while maintaining the autonomy of each database. Different linearization techniques of complex objects are supported to enable applications to retrieve complex objects as single entities. This model is implemented in PEER, a federated, object-oriented database system developed for engineering applications.
作者：
Soutou, C.URACOM
9 Avenue de 1'Europe Ramonville31527 France
This paper proposes a methodology for developing a federated database system. This principle permits one to use several conjoined databases without defining any global schema. The bottom-up approach is based on the ho...
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To access distant information from an interoperable multi object-oriented database (IM-OODB), a user needs to construct retrieval path-methods through one or several OODB schemas. The path-method generator (PMG) syste...
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We present a language Noodle in which to specify declarative queries in an object-oriented database system. The language models object-identity, classes, relations, views, inheritance, complex objects, and methods, in...
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The object-based event calculus is a modified version of the event calculus which is a general approach to the treatmeht of time and change in a logic programming framework. We present here the use of the object-based...
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As active and deductive databases are applied to more complex domains (e.g. engineering design), the need to track the causality of data which has been derived by rules in the database becomes vital. Truth maintenance...
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Not far behind the leaders in the object-oriented revolution, the advocates of object-oriented databases and methodologies have been rushing into print to establish their commercial positions — or academic reputation...
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