Token-Templates and Logic Programs for Intelligent Web Search |
| |
Authors: | Bernd Thomas |
| |
Affiliation: | (1) Institut für Informatik, Universität Koblenz, Rheinau 1, D-56075 Koblenz, Germany |
| |
Abstract: | We present a general framework for the information extraction from web pages based on a special wrapper language, called token-templates. By using token-templates in conjunction with logic programs we are able to reason about web page contents, search and collect facts and derive new facts from various web pages. We give a formal definition for the semantics of logic programs extended by token-templates and define a general answer-complete calculus for these extended programs. These methods and techniques are used to build intelligent mediators and web information systems. |
| |
Keywords: | information extraction template based wrappers mediators logic programming theory reasoning deductive web databases softbots logic robots |
本文献已被 SpringerLink 等数据库收录! |