可是不易处理的问题是，应用软件期望这个数据结构用 COBOL语言来定义。
The tricky issue, though, is the fact that the PhoneBook application expects the data structures to be defined in COBOL language.
同时，为使高层应用易于对模型进行有效性和一致性检查，采用超图数据结构形式化地定义了上述模型的概念模型。
Besides, in order to facilitate applications to check affectivity and consistency of this model, a formal concept model based on hyper-graph data structure is proposed.
应用模型是一种基于对象的描述模型，它将数据视图作为一种对象来定义和使用，从而使其能够描述比较复杂的数据结构。
Application model is a kind of description model based on objects, it USES the concept of object to define data views, and can describe complex data structures.
为了实现数据对应用程序的独立性，应用程序自行定义所需要的局部逻辑数据结构。
In order to keep the data independence from application program, the necessary local logical data structure can be self-defined in every individual application program.
由于工程应用环境中设计对象的复杂性，这就要求工程数据库管理系统能够对复杂的数据结构作为单一实体进行定义并为之提供有效的数据操纵手段。
Due to the complexity of design objects, it is necessary for the EDBMS to treat complex data structures as single entities and provide the efficient facilities for data manipulation.
在采纳了其它地籍信息系统的一些成功经验并加以修改和应用的基础上，定义了一种存储地籍信息数据的时空数据结构，较好地解决了地籍管理中的大量的历史数据问题。
This paper defines a kind of spatiotemporal data structure used to store cadastral information data, and it has soluted the problem of a lot of historical data in the management of cadastral.
公共信息模型CIM是电力企业应用集成的重要工具、是逻辑数据结构的灵魂、是可定义的信息交换模型。
CIM is an important tool in integration, which has defined the information sharing model. It is also soul of logical data structure.
公共信息模型CIM是电力企业应用集成的重要工具、是逻辑数据结构的灵魂、是可定义的信息交换模型。
CIM is an important tool in integration, which has defined the information sharing model. It is also soul of logical data structure.
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