VI-DE:DE-Wrapper的可视化编辑调试环境  

VI-DE: A Visual Editing and Debugging Environment for DE-Wrapper

作　　者：李岱[1] 邓绪斌[1] 朱扬勇[1] 

机构地区：[1]复旦大学计算机与信息技术系,上海200433

出　　处：《计算机工程》2006年第8期107-109,203,共4页Computer Engineering

基　　金：国家"863"计划基金资助项目(2002AA231011);上海市重大科技项目(02DJ14013)

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。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 tbe 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.

关 键 词：数据抽取 扩展正则表达式 DE-Wrapper DE-树 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]