Easier to learn than other Object-Oriented Database Systems (ODBMS) - no need to learn a proprietary API - any user with some experience with Hibernate, TopLink, EclipseLink, OpenJPA, JPOX or DataNucleus could start using ObjectDB immediately. SQL-like (but object based) query language - ...
Independently, the Object Data Management Group (ODMG) proposes a standard based on a pure object model. A lot of research and development from the industry and academia is devoted to various aspects of object-relational and object-oriented DBMS. The presentation is a short overview of these ...
Regardless whether the underlying database model follows the object-oriented, the rela tional or the object-relational paradigm, a key feature of any DBMS product is content based access to data sets. On the one hand this feature provides user-friendly query interfaces based on predicates to ...
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...
These algebras can be inserted in any data model iftheir designs are based on available standards such as Open Geospatial Consortium that provides acommon model for existing DBMS's. In this paper, we focus on extending a spatial data model forconstrained moving objects. Static and moving ...
Formally, an object-oriented database model is a tuple (CS,AS,RS,O,M,S), in which CS is a finite set of classes, AS is a finite set of attributes, RS is a finite set of relationships, O is a finite set of objects, M is a finite set of methods, and S is a finite set of...
其中,type_name是对象类型的名称,v_name是属性名称,datatype是属性数据类型,method是方法的名称,body是PL/SQL的方法实现代码。 如果定义对象类型头时没有定义方法,则不需要建立对象类型体。 3、建立和使用不包含任何方法的对象类型 --建立对象类型 create or replace type person_typ1 as object(name varchar2(10...
Object types and other user-defined datatypes let you define datatypes that model the structure and behavior of the data in their applications. An object view is a virtual object table.This chapter contains the following major sections:Introduction to Object Datatypes Object Datatype Categories Type ...
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, ...