A unified framework for wrapping, mediating and restructuring information from the web

Wolfgang May, Rainer Himmeröder, Georg Lausen, Bertram Ludäscher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The goal of information extraction from the Web is to provide an integrated view on heterogeneous information sources via a common data model and query language. A main problem with current approaches is that they rely on very different formalisms sind tools for wrappers and mediators, thus leading to an “impedance mismatch” between the wrapper and mediator level. In contrast, our approach integrates wrapping and mediation in a unified framework based on an objectoriented data model which represents both the Web structure and the data of the application domain. Wrappers and mediators are written in a rule-based object-oriented language which is augmented with features for Web access and structured document analysis, i.e., pattern matching by regular expressions aind SGML parsing. In this paper, we develop generic, reusable rule patterns for typical extraction, integration, and restructuring tasks using this framework. We show the practicability of our approach by using the FLORID system [10].

Original languageEnglish (US)
Title of host publicationAdvances in Conceptual Modeling - ER 1999 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, Proceedings
EditorsPeter P. Chen, Jacques Kouloumdjian, David W. Embley, Stephen W. Liddle, John F. Roddick
PublisherSpringer
Pages307-320
Number of pages14
ISBN (Print)3540666532, 9783540666530
DOIs
StatePublished - 1999
Externally publishedYes
EventWorkshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, ER 1999 - Paris, France
Duration: Nov 15 1999Nov 18 1999

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume1727
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

OtherWorkshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, ER 1999
Country/TerritoryFrance
CityParis
Period11/15/9911/18/99

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science

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