RESEARCH ON MULTIDATABASE RETRIEVAL IN WEB SERVICES ENVIRONMENT

该项目的目的是研究信息检索的基础和实现及其在互联网上使用Web服务的集成。基于Web服务可以实现灵活的分布式信息系统。然而，我们需要一种方法来检索和集成存储在各种类型的数据库中的信息。我们建议使用XML来集成基于信息的信息。使用Web服务查询各种数据模型中的数据库中的信息，并将结果以XML格式发送给协调器。协调器使用JOIN和其他操作集成这些结果。基于该方法，我们实现了一个实验性的多数据库系统，验证了该方法的有效性。我们还研究了一种利用门户网站的方式为用户提供服务质量信息的方法。

The aim of the project is to study the foundation and implementation of information retrieval and its integration in the Internet using web services. We can realize flexible distributed information systems based on the Web services. However, we need a way to retrieve and integrate information stored in various types of databases. We propose to integrate information based using XML. Information in databases in various data models are queried using web services, and their results are sent to a coordinator in XML. The coordinator integrates these result using join and other operations. We have implemented an experimental multi-database system based on this approach, and showed the proposed method is effective. We also studied to a way to provide users the service quality information using portal site approach.