| 基于控制字典的对象式地质属性数据管理 |
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| 引用本文： | 花卫华,刘纪东,刘修国.基于控制字典的对象式地质属性数据管理[J].地球科学,2015,40(3):425-430. |
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| 作者姓名： | 花卫华 刘纪东 刘修国 |
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| 作者单位： | 中国地质大学信息工程学院, 湖北武汉 430074 |
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| 基金项目： | 中国地质调查局项目“西准噶尔克拉玛依后山地区三维地质调查试点”(No.1212011220245);新疆1∶25万铁厂沟镇幅(L45C002001)与克拉玛依市幅(L45C003001)区调修测项目(No.1212011120502);长江三角洲重点地区三维地质调查(No.1212011220250);国家自然科学基金青年基金项目(No.41002115);中央高校基本科研业务费专项资金项目(No.CUGL120270) |
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| 摘 要： | 传统地质数据管理与应用是参照数据库的外模式来设计数据结构和数据访问接口，在业务逻辑没有发生大的变动情况下，外模式发生更改后，需要修改应用程序才能适应新的数据库结构.鉴于此弊，在关系数据库视图机制的启发下，通过分析不同地质专业地质属性数据的特征，对地质数据库外模式的高度概括，形成用于地质业务分析评价所需的关键属性组成的元组集——控制字典表，基于控制字典抽象出面向地质行业的对象式数据模型、映射数据模型与地质数据的关系，并参照控制字典表的“数据结构”来设计数据访问接口，最终实现地质数据库的动态扩展，无需再修改应用程序，需要做的仅仅是修改控制字典与外模式之间的映射关系，以不变应万变.控制字典作为一个中间件，将用户对地质数据的操作和计算机对地质数据的处理分离开来，充分保证了程序和数据层的逻辑独立性.
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| 关 键 词： | 控制字典 地质对象 用户表 数据表 映射 信息科学 |
| 收稿时间： | 2014-09-30 |
Data Management of Object Type Geological Features on Control Dictionary |
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| Hua Weihua
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Liu Jidong
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Liu Xiuguo.Data Management of Object Type Geological Features on Control Dictionary[J].Earth Science-Journal of China University of Geosciences,2015,40(3):425-430. |
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| Authors: | Hua Weihua Liu Jidong Liu Xiuguo |
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| Institution: | Hua Weihua;Liu Jidong;Liu Xiuguo;Faculty of Information Engineering,China University of Geosciences; |
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| Abstract: | The structure and access interfaces of data are designed by reference to external schema changes in traditional management and application of geological data, for which application programs have to be modified in case of any external schema changes, even if there are not much variations in business logic. To tackle the issue, control dictionary tables are proposed in this study by analyzing the characteristics of different geological attribute data and generalizing external schema of geological databases based on view mechanism of relation databases, which is used in character-set formed from determinant attributes needed for geological business analysis and evaluation. Meanwhile, data access interfaces are designed according to the data structures of the control dictionary tables which abstract the object-oriented data model of geological professions and map the relation between the data model and geological data. It is shown that it is only necessary to modify the mapping relations between control dictionary and external schema rather than applications to realize the expansion of geological databases dynamically, in which the control dictionary separates the operation of geological data by users and from the processing by computers as a middleware, thus ensuring the logic independence of program and data layers. |
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| Keywords: | control dictionary geological object user table data table mapping information science |
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