Efficient evaluation of path expressions in distributed object databases involves choosing among several query processing strategies, due to the rich semantics involved in object-based data models and to the complexity added by the distribution. This work presents a new cost model for object-based ...
In their influential paper, The Object-Oriented Database Manifesto, Malcolm Atkinson and others define an OODBMS as follows: An object-oriented database system must satisfy two criteria: it should be a DBMS, and it should be an object-oriented system, i.e., to the extent possible, it shoul...
Generally speaking, fuzziness in the fuzzy object-oriented database models can be identified at four major levels. • First, the attribute value of an object (say op(Aj(Ci)) (1≤p≤n)) is a fuzzy one represented by a fuzzy set (say {(v1,μ(v1)),(v2,μ(v2)),…,(vq,μ(vq...
Complex Data Models The Oracle server lets you define complex business models in SQL and make them part of your database schema. Applications that manage and share your data need only contain the application logic, not the data logic.
Object-Oriented Database Task Group Object-oriented DBMS Object-oriented design Object-Oriented Design and Development Object-Oriented Design Method Object-Oriented Design with Assemblies Object-Oriented Development Object-Oriented Distributed Computing Environment ...
* Not-mappable concepts: not all of the concepts defined in the conceptual model can be mapped directly onto the object-relational model (e.g. Model-driven development of content-based image retrieval systems This book examines all of the major database models, including hierarchical, network, ...
foundation. The calculus is essentially a calculus of complex values but it is defined independently of any concrete database model. The calculus can be used to formulate queries in value-based and object-based data models. Moreover it provides a general facility for the manipulation of complex ...
Linking an object-oriented program to arelational databaseposes two problems for developers. First, some means must be provided to allow the program to access the database, and second, the object-oriented analysis and design models have to be modified in some way so that they can be implement...
. Traditional software development models assume a top-down approach. A functional description of a system is produced and then refined until a running implementation is achieved. Data structures (and file structures) are proposed and evaluated based on how well they support the functional models....
Depending on the performance requirement, these operators can be implemented in software or as special-purpose processors in the form of VLSI chips. Based on these primitive operators, a high-level database request can be decomposed and executed in parallel. Finally, the OFC combines a number of...