Abstract: A system named xScraper was developed based on the data extraction rules investigation in Web-Harvest, 5 main functions of this system are(1) flexible specification of extraction rules to meet different application rectuire- menu; (2) controllable bulk non-structured data (incl. images) extraction from the same Web site; (3) deep extraction of topi}rclated information across many Web sites; (4) extraction of metadata from Web sites and transformation in to XML tags; (5) non-structured multi-media information management in databases. xScraper is a simple, practical and ex- tendable system. It provides value-added services over Web-Harvest and can meet different requirements of Web infor- matron extraction.

Key words: Web information extraction, xScraper, Web-Harvest core techniques