Firstly , it presents the storing arithmetic based on the mapping policy between xml data modal and object - oriented modal . reference to the arithmetic of extracting object - oriented database schemas from xml dtds using inheritance and other commercial tools for xml storing , it improves mapping policy from xml to object , which optimizes the new semantic classes , what ' s more , it present object clustering policy to resolve the uncertainty of xml schema and the complexity of information intergration , which simultaneously focuses on the semanteme and structure of new object classes . on the other hand , it presents method to realize exchanging from object to xml 本文研究构造基于xml信息集成系统结构的面向对象数据库包装器,提出面向对象数据库包装器的系统结构;根据该结构提出xml的数据模式与面向对象数据库对象数据模式的映射策略及相互存储转化算法,一方面我们借鉴基于dtd模式的继承对象映射提取算法及各种商业工具,提出dtd简化算法和基于dtd简化结构的对象图映射算法,优化了生成的对象类、提高了对象类的语义表达能力,也改进了对象映射提取策略;同时采用模糊聚类策略,提出对象聚类处理算法,改善了xml语义定义的随意性给对象类提取及信息集成带来的复杂性;另一方面本文提出对象到xml的转化算法,采用系统自动定义对象到xml的转化方法实现对象到xml的转化处理。
This paper has deeply research database designing and management information system using the object - oriented technology , and the main achievements acquired are as following : ( 1 ) has compared a few current popular object - oriented methods ; and pointed their advantages and disadvantages . ( 2 ) give out the methods to design the object - oriented database interface , and give out the algorithm that the pattern of object - oriented pattern to the relationship transforms ( 3 ) introduce the orient - relationship technique of the oracle9i database ( 4 ) finally , this text starts from developing an electric power marketing database system ; in this mis software develop of the application made the beneficial trial with the got 本文利用面向对象的方法对数据库设计与管理信息系统作了深入研究,取得的主要成果有: ( 1 )对时下几种流行的面向对象的方法进行了比较,论述其优缺点; ( 2 )给出了面向对象数据库接口设计方法的,并给出了对象模型向关系模型转化的算法( 3 )介绍了现在主流数据库oracle9i的对象关系技术( 4 )最后,从开发一个电力营销数据库系统入手,对oot在mis软件开发中的应用作了有益的尝试。
With the constant extension in applications of computer , the object - oriented and active performance is more notable , and the traditional database management system ( dbms ) already can " t meet the needs of many modern applications . to meet the needs , an active and object - oriented database management system ( aoodbms ) is designed in this thesis . several aspects are introduced as follows 随着计算机在应用中的不断扩展,在面向对象和主动性方面的要求也越来越多,传统的数据库系统已经无法满足现代的许多应用的需要,本文设计了一个主动面向对象数据库系统以满足这种需要,主要从以下几个方面进行了介绍:首先,本文分析了课题研究的背景、研究意义、研究历史和研究现状。
Abstract : in view of the system structure and transaction model of oodb , a practical and efficient recovery strategy ? wal p is proposed , which is implemented in the object - oriented database system kdoodb , and provide powerful support for the efficient implementation of the transaction management 文摘:从面向对象数据库的体系结构和事务模型的角度出发,提出了一种实用有效的恢复策略wal _ p ,该策略实际应用于自行研制的面向对象数据库系统kdoodb中,为事务管理的有效实现奠定了基础。
With the development of computer technology and generalization of its application , traditional relation database is more and more uncomfortable for new requirement especially for application development based on internet , which lead to emergence of a new generation of database system , pure object - oriented database ( oodbms ) 随着计算机技术发展和使用的普及,特别是基于internet上应用的发展,传统关系数据库系统已越来越不能满足新的需要。新一代的数据库系统? ?纯面向对象数据库( oodbms )逐渐问世。