object-oriented database schemas axe often defined by several future users of the planned database, where each user defines a schema representing his/her view on the database;the complete database schema is defined by...
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ISBN:
(纸本)3540666869
object-oriented database schemas axe often defined by several future users of the planned database, where each user defines a schema representing his/her view on the database;the complete database schema is defined by integrating these views in a subsequent step. Behavior of objects is often defined at two levels of detail: at the level of methods and at the level of object life-cycles that represent the overall behavior of objects during their life time. This paper presents an approach to integrate views of object life-cycles to a complete object life-cycle of an object type. We will particularly consider the problem that different users know about parts of the object life-cycle at different levels of detail and often do not consider exactly the same set of entities.
In this paper we propose a model of a database that could become a kernel of cooperative database applications. First, we propose a new data model CDM (Collaborative Data Model) that is oriented for the specificity of...
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ISBN:
(纸本)1581131461
In this paper we propose a model of a database that could become a kernel of cooperative database applications. First, we propose a new data model CDM (Collaborative Data Model) that is oriented for the specificity of multiuser environments, in particular: cooperation scenarios, cooperation techniques and cooperation management. Second, we propose to apply to databases supporting collaboration so called multiuser transactions. Multiuser transactions are flat transactions in which, in comparison to classical ACID transactions, the isolation property is relaxed.
In OODB, path expressions are usually used for navigating through complex objects and obtaining necessary information at the far end of a sequence of object *** parallel forward pointer chasing algorithm (PFPC) and pa...
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In this paper we propose a new General Image DataBase (GIDB) model. The model establishes taxonomy based on the systematisation of existing approaches. The GIDB model is based on the General Image Data model [1] and G...
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The paper addresses issues related to the design of a graphical query mechanism that can act as an interface to any object-oriented Data Base System (OODBS), in general, and the object Model of ODMG 2.0, in particular...
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Deductive object-oriented databases are intended to combine the best of the deductive and object-oriented approaches. However, some important object-oriented features are not properly supported in the existing proposa...
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Much effort has been expended by the speech community in designing and producing speech corpora and databases. However, considerably less thought has been given to the type of database model that best represents speec...
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In the collaborative systems, a group of users engage in common tasks such as group decision making, office information system and collaborative writing. Since multiple users can modify the shared information resource...
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We address the problem of retrieving stored multimedia presentations using relevance feedback. We model multimedia presentations using a crisp relational or objectoriented database, augmented with a text attribute. W...
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Typical Java applications involve access to a database system. Database systems store data according to their type system, even object-oriented databases generally have their own storage structures. It is therefore ne...
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