【摘要】 对数据量大、数据来源及用户分布范围广、数据间关系复杂、种类多且需进行动态维护、统计分析查询的数据处理问题,该文给出了一种基于归类树且适合Web访问的数据模型,分别用数学语言及UML的用例图描述概念模型,以ER图描述逻辑模型,分析其适应性、数据一致性及正确性。并介绍了利用该数据模型实现的一个系统,说明了其可行性。更多还原

【Abstract】 Facing the problem having a large amount of data whose relations and classifications are complex and need to be managed,analysed and queried,and having widespread data sources and users,this paper proposes a data model for Web access based on classification tree,it’s conceptual model presented in mathematics language and UML use case diagram and logical model presented in ER graphic.Meanwhile,the paper analyses the model’s flexibility,data consistency and accuracy,and introduces a practical system using the model above to prove its practicability.更多还原