摘要： 综述了基于Ｉｎｔｅｒｎｅｔ上分布异构信息源的网上信息集成技术的研究进展，通过典型实例对其中信息提取与转换、数据模型和查询处理等关键技术的最新进展进行了归纳与探讨，最后对该领域今后的研究方向进行了展望．

关键词: 信息集成, Internet, Wrapper, 信息提取:数据模型, 查询处理

Abstract: The paper is a survey of the development of the techniques for integrating information from distributed, heterogeneous sources on the Internet. The key techniques are summarized and introduced in detail via some typical examples, including information extraction and transformation. data model. and query processing. Finally. a vista about the study of the field is presented.