In this article, we propose a solution for the distributed objectoriented database design. Our work is based on a top-down approach. Notably, we concentrate on the allocation step that allows to place the object clas...
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This paper presents a security model for objectorienteddatabases. The approach involves the introduction of several security concerns in objectorienteddatabases. The access specifiers concept of objectoriented pr...
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This paper formalizes inheritance and genericity in the context of objectorienteddatabases. We present a uniform view for objects and types. We model, in the same framework, multiple inheritance and unconstrained ge...
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ODB-Tools is a integrated environment for the objectoriented database (OODB) validation, preserving taxonomy coherence and performing taxonomic inferences, and semantic query optimization. Semantic query optimization...
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In this paper we present a uniform approach to dynamic relationships in objectorienteddatabases. We present our relationship categorisation based on dividing the object database into three virtual spaces each hostin...
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Many object-oriented systems and semantic data models offer mechanisms for attribute inheritance based on the concept of generalization. But some applications, for instance from the fields of CAD/CAM or artificial int...
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This paper proposes a bottom-up method that helps designers of decision support systems to construct data mart schemas based on an object database. Our method extracts the database schema from the repository of the ob...
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In this paper, we address the representation of object-oriented databases in XML format. This will allow for better and platform independent sharing of data stored in object-oriented format. We handle the process by f...
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ISBN:
(纸本)9781605583495
In this paper, we address the representation of object-oriented databases in XML format. This will allow for better and platform independent sharing of data stored in object-oriented format. We handle the process by first applying a reverse engineering approach to extract what we call an object-graph from the object-oriented database. Then, we convert the object-graph into XML schema;we avoid DTD representation because XML schema is more flexible and widely accepted as part of the standardization of XML. Deriving the object-graph empowers the proposed approach to smoothly consider both the inheritance and the nesting hierarchies during the mapping into XML schema. We provide a user-friendly interface that displays the result of each phase of the conversion process. Test results are encouraging, demonstrating the applicability and effectiveness of the proposed approach. Copyright 2008 ACM.
CERN's (European Organization for Nuclear Research) WISDOM project uses XML for the replication of data between different data repositories in a heterogeneous operating system environment. For exchanging data from...
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ISBN:
(纸本)9729881618
CERN's (European Organization for Nuclear Research) WISDOM project uses XML for the replication of data between different data repositories in a heterogeneous operating system environment. For exchanging data from Web-resident databases, the data needs to be transformed into XML and back to the database format. Many different approaches are employed to do this transformation. This paper addresses issues that make this job more efficient and robust than existing approaches. It incorporates the World Wide Web Consortium (W3C) XML Schema specification in the database-XML relationship. Incorporation of the XML Schema exhibits significant improvements in XML content usage and reduces the limitations of DTD-based database XML services. Secondly the paper explores the possibility of database independent transformation of data between XML and different databases. It proposes a standard XML format that every serialized object should follow. This makes it possible to use objects of heterogeneous database seamlessly using XML.
This paper presents a mechanism to enforce consistency in objectoriented DBMS using pre-conditions and post-conditions on methods. This mechanism is coupled with an exception mechanism to allow deferred controls and ...
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