Web信息抽取和展现系统的设计与实现

随着计算机网络技术的高速发展,如何高效准确地识别和获取Web信息变得至关重要。文章介绍了一个完整的Web信息抽取和展现系统,其总体架构由Web网站集、抽取规则库、内容定制模块和内容展现模块4部分组成。该系统支持用户通过可视化交互式界面定制信息抽取规则,实现了用户个性化抽取规则的存储。在数据项定位方式上采用基于DOM树和分层区域划分的方法,结合父子结点信息进行数据校验,既可以快速定位到信息抽取的目标区域,又能有效保证抽取方法的精度。

Design and Implementation of Web Information Extraction and Visualization System

With the rapid development of computer network technologies,it is of critical importance to efficiently and accurately recognize and acquire web information.This paper describes a complete Web information extraction and visualization system,which consists of four components,web sites,extraction rules repository,content customization module and content displaying module respectively.The system supports the user to customize and save information extraction rules through visual and interactive interfaces.And the data items searching method used in the system integrates the DOM tree based method with the hierarchical area partition method,and validate data by combining parent node information with child node information,which can not only quickly navigate to information extraction target area,but also effectively guarantee the accuracy of extraction methods.