摘要： 介绍了VI-DE，数据抽取工具DE-Wrapper 的可视化编辑调试环境。DE-Wrapper 使用扩展正则表达式(ERE)描述数据源结构，根据该ERE 构造数据抽取树(DE-树)，然后根据DE-树生成相应的关系数据库模式，最后抽取数据。VI-DE 整合了DE-Wrapper 的工作流程。该工具首先使用可视化界面支持ERE/DE-树可视化构建，然后自动检查该ERE/DE-树是否具有二义性，最后在样本数据上运行抽取算法并给出数据库结构和抽取结果，供用户进行评价，从而逐步引导用户设计出满足要求的ERE/DE-树。VI-DE 已用于构建国内第1 个整合的生物信息在线数据仓库系统。

关键词: 数据抽取；扩展正则表达式；DE-Wrapper；DE-树

Abstract: This paper describes VI-DE, a visual editing and debugging environment for DE-Wrapper. DE-Wrapper is a tool developed for solving data extraction problems, which describes the structure of data source with the extended regular expressions(ERE) and creates the data extraction tree (DE-Tree) according to the ERE, then generates the relational tables and extracts data finally. VI-DE unifies the working process of DE-Wrapper. Firstly, VI-DE enables the visual-construction for DE-tree. Secondly, it automatically detects the ambiguity of ERE. Thirdly, the tool runs the data pre-extraction and shows the relational tables created and the result of data extraction using GUI. At last, it runs the data extraction. It helps a user design the ERE/DE-tree that satisfies with the requirement step by step. VI-DE has been applied to build the first online integrated biological data warehouse of China.

Key words: Data extraction; Extended regular expressions; DE-Wrapper; DE-Tree