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...
Groundwork for an Object-Oriented Database ModelBeech, D
Object Oriented Database Model Object Oriented Database Model Represents an entity as a class Represents an entity as a class A class captures both attributes and behavior A class captures both attributes and behavior Instances of the class are called objects Instances of the class are called objec...
(1)选择File→New Model菜单项 (2)在左侧Model type中选择“Object-Oriented Model”(面向对象模型) (3)在右侧输入模型名称,选择语言 (4)选择类型 1.2 设计用例图 (1)定义用例 (2)定义角色 (3)定义关联 1.3 设计序列图 (1)定义角色 (2)定义对象 (3)定义消息 (4)定义激活期 1.4 设计类图 (1)定义类 ...
Object-oriented database systems – Dynamic object re-classification – Object role model – Dynamic class hierarchy – Object migrationTo effectively model complex applications in which constantly changing situations can be represented, a database system must be able to support the runtime specification...
Attoui, A., Homond, P. (1992). MO2 An object Oriented Model for DataBase and Parallel Systems. In: Tjoa, A., Ramos, I. (eds) Database and Expert Systems Applications. Springer, Vienna. https://doi.org/10.1007/978-3-7091-7557-6_82 ...
The current data models used in OODBMS (object-oriented database management systems) are basically divided into two categories: traditional type-strong and... LS Huang,HP Chen,QL Zheng,... 被引量: 5发表: 2001年 An extended object-oriented data model for complex inter-entity relationships Obje...
以前一直是通过powerdesigner 的Object Oriented Model生成数据库表,再通过代码生成器生成nhibernate实体类,映射文件。感觉不是很直接。 使用powerdesigner 15的内置功能,就可以生成nhibernate的数据访问层。不过默认的用在实际环境中不是很好,可以改一下模板生成自已需要的。下面是实际步骤。
An OVUM report published in 1988 predicted that database systems adhering to an object-oriented data model as opposed to a relational data model would overtake relational database systems by the mid 1990s (OVUM, 1988). Although this clearly has not happened, there is no doubt that object-orien...
To full fill this, we developed an object oriented database tool to retrieve and store the GEOMETRY model data from a STEP file using JAVA. This tool operates around a model that uses a well-defined configuration management strategy to manage and storage of GEOMETRY data....