| With the continuous development of science and technology, many of the people working toward a paperless, automated direction, not only cost savings, but also more convenient. The real gradually reduced, virtual data is increasing more and more widely, making use of the database system, and gradually become the people office an integral part of the technology means. In recent years, the database system technology into computer science and technology in the most important branch of the fastest growing. The popularity of the database system, convenient for people to use, but there are still some drawbacks, that is, each type is different, is not compatible with the use of heterogeneous database systems has become the dominant database system research in recent years, many units, departments will be faced with an urgent need to address the problem, because each building different types of database systems, can not be achieved resource sharing of information, leading to efficiency is no small impact, and how to solve the problem, and it is these units is urgently needed.School I work there with this problem, various departments have built their own database system, and these types of systems are not exactly the same, to achieve full sharing of information, there are some problems, such as:If you update the database as a unified type investment in the project is very high, and time-consuming, energy from the school management would not approve, so looking for a solution from another. According to the actual situation and the current level of database technology, the paper proposes an XML-based B/S three-tier structure:the campus network of heterogeneous database system, the purpose of this system is to solve the current problems, mainly:how dynamic generate information resources directory (IRD); how different types of new database resource sharing; how to build heterogeneous database; how complete data query; relational database data into standard XML document.etc. |
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