面向对象数据库技术及其应用——Ontos:集成对象系统

Object-oriented database technique and its application—— Ontos:integrated object system.

Ontos是一个在扩展C 编程环境下集成的面向对象的数据库管理系统。被存储在数据库中的持久对象 ,例如实体 ,可以在C 应用程序中访问和控制。Ontos对象基础包括用户自定义实例对象。每个对象作为一个实体封装了描述数据和访问及控制实例内部状态的操作 ,所有这些与数据库实例相联的公共特征 (以操作和属性形式提供的公共特征 )可以被C 应用程序调用。

Ontos is an object-oriented database management system which is integrated in an extended C*F*F programming environment. Persistent objects, i.e. , entities that are stored in the database can be visited and manipulated within a C*F*F application program. The Ontos object base contains objects that are instances of user-defined types. Each object as an entity encapsulates the describing data and the operations to visit and manipulate the internal state of the instance. All the public features associated with a database entity (providing in the form of operations and attributes) can be invoked by the C*F*F application program.