【摘要】 文章介绍了两种访问分布式数据源的方法，描述了两种方法所共有的处理流程，并比较了它们的优缺点，详细地讲述了两种方法在处理过程中的两个重要步骤。更多还原

【Abstract】 This paper introduces two methods for realizing access to distributed information resources, describes the common processing flow chart of the two methods, and compares their advantages and drawbacks. This paper also gives a detailed account of the two important steps in processing.更多还原