计算机专业英语(数据库4)

Unit Three Database
Passage Four Object database
• Sentences ：
An object-oriented database management system (OODBMS， sometimes shortened to ODBMS for object database management system), is a database management system (DBMS) that supports the modelling and creation of data as objects.
• Seቤተ መጻሕፍቲ ባይዱtences ：
In the meantime, the object-relational database management system (ORDBMS), the idea that object-oriented database concepts can be superimposed on relational databases, is more commonly encountered in available products.
计算机专业英语
张起荣
Unit Three Database
Passage Four Object database • Keywords：
connectivity 连通性 embedded 嵌入式 object-oriented database 面向对象数据库 object-oriented programming 面向对象的编程 mainstream 主流 molecular biology 分子生物学 real-time system 实时系统
Passage Four Object database
• Word-building ： 前缀+词根+后缀=新词 例如：inter-前缀，表示相互的； -ability后缀，表示…. .的能力 operate 操作 interoperability互操作性
Unit Three Database
Passage Four Object database
Unit Three Database
Passage Four Object database
• Word-building ： computational 计算的 completeness 完整性 dependency 依赖 entity class 实体类 case sensitive 大小写敏感 copy and paste 复制和粘贴 configuration 配置
Unit Three Database
Passage Four Object database
• Sentences ：
Using a DBMS that has been specifically designed to store data as objects gives an advantage to those companies that are geared towards multimedia presentation or organizations that utilize computer-aided design (CAD).
Unit Three Database
Passage Four Object database
• Sentences ：
In fact there is an intrinsic tension between the notion of encapsulation, which hides data and makes it available only through a published set of interface methods, and the assumption underlying much database technology, which is that data should be accessible to queries based on data content rather than predefined access paths.
Unit Three Database
Passage Four Object database
• Word-building ： 动词+ tivity后缀=名词。 例如：connect连接(动词) connectivity连通性 act 行动(动词) activity活动
Unit Three Database
Unit Three Database
Passage Four Object database
• Keywords： declarative 声明性的 impedance 阻抗 mismatch 错配,失谐 interoperability互操作性 infancy 早期, 初始阶段 demonstrate 示范.展示 persistent data 持久性数据
Unit Three Database
Passage Four Object database
• Sentences ：
However, with suitable language support, direct object references may be maintained in addition to normalised indexed aggregations, allowing both kinds of access; furthermore, a persistent language may index aggregations on whatever its content elements return from a call to some arbitrary object access method, rather than only on attribute value, which allows a query to 'drill down' into complex data structures.
Unit Three Database
Passage Four Object database
• Keywords： concurrency control并发控制 data recovery 数据恢复 associative query 关联查询 inheritance 继承 override 重载 bind 绑定 extensibility 可扩展性
Unit Three Database
Passage Four Object database
• Sentences ：
Other things that work against ODBMS seem to be the lack of interoperability with a great number of tools/features that are taken for granted in the SQL world, including but not limited to industry standard connectivity, reporting tools, OLAP tools, and backup and recovery standards.