Wrapper Induction Programs as Information Extraction Assistants

Wrapper Induction Programs as Information Extraction Assistants

Klaus Jantke (Research Institute for Information Technologies Leipzig, Germany) and Carsten Müller (SAP AG, Germany)
DOI: 10.4018/978-1-59140-878-9.ch003
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Abstract

These days, search engines are useful tools relying on quite elaborated technologies which, albeit their enormous frequency of usage and the sophistication of the technologies invoked, continuously frustrate thousands of users. They are simply tools not easy to wield, but they are far from being assistants to their human users. Wrappers are extraction procedures which exploit knowledge of how to wrap information into documents for extracting such information on demand. Wrappers alone are nothing more than highly specialized tools. But the development of wrapper types and information ex-traction technologies has paved the road for a transformation of information extraction tools into intelligent assistants. Such a technology transformation program is outlined and discussed in some detail. The chapter stresses the dichotomy of internal mechanisms and external assistance behavior. It is the authors’ general intention to contribute to the discussion about perspectives of intelligent systems’ assistance. Which properties, features or “systems’ abilities” do establish intelligent assistance beyond the limits of comfortable tools? What are related advantages and drawbacks? What are the potentials and what are the risks of the general trend from tools to assistants? Wrapper induction serves as a representative case study.

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Table of Contents
Preface
Roland Kaschek
Acknowledgments
Chapter 1
Gunter Grieser, Steffen Lange
This chapter deals with the question of how the interaction between humans and computers may be designed to enable both partners to bring in their... Sample PDF
Interaction Scenarios for Information Extraction
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Chapter 2
Klaus Jantke, Nataliya Lamonova
Software systems on their way from tools to assistants have to be equipped with learnability. This does apply in complex problem solving... Sample PDF
Assistance and Induction: The Therapy Planning Case
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Chapter 3
Klaus Jantke, Carsten Müller
These days, search engines are useful tools relying on quite elaborated technologies which, albeit their enormous frequency of usage and the... Sample PDF
Wrapper Induction Programs as Information Extraction Assistants
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Chapter 4
Roland Kaschek
An intelligent assistant system is supposed to relatively autonomously aid a master in problem solving. The way of doing so that is favored in this... Sample PDF
Modeling Confidence for Assistant Systems
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Chapter 5
Son B. Pham, Achim Hoffmann
In this chapter we discuss ways of assisting experts to develop complex knowledge bases for a variety of natural language processing tasks. The... Sample PDF
Intelligent Support for Building Knowledge Bases for Natural Language Processing
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Chapter 6
Klaus-Dieter Schewe, Bernhard Thalheim, Alexei Tretiakov
The aim of this chapter is to formalize user preferences, obligations, and rights in the context of Web information systems (WISs), and to indicate... Sample PDF
Formalization of User Preferences, Obligations and Rights
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Chapter 7
Kimihito Ito
This chapter introduces a software architecture to build intelligent multimodal assistants. The architecture consists of three basic components: a... Sample PDF
Building Intelligent Multimodal Assistants Based on Logic Programming in the Meme Media Architecture
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Chapter 8
Nataliya Lamonova, Kimihito Ito, Yuzura Tanaka
This chapter introduces an approach for creating Web application capable of operating in complex environments is introduced. The approach shows how... Sample PDF
From Planning Tools to Intelligent Assistants: Meme Media and Logic Programming Technologies
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Chapter 9
Yuzura Tanaka
The current Web is a mine of tools and services and the gate to ubiquitous computing environments with a huge number of highly distributed mobile... Sample PDF
Memetic Approach to the Location-Based Ad Hoc Federation of Intelligent Resources
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Chapter 10
Klaus Jantke, Christoph Igel, Roberta Sturm
Humans need assistance in learning. This is particularly true when learning is supported by modern information and communication technologies. Most... Sample PDF
From E-Learning Tools to Assistants by Learner Modelling and Adaptive Behavior
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Chapter 11
Sabina Jeschke, Thomas Richter
The workplace of scientists and engineers is about to change: even though numerical software and computer algebra systems remove the burden of... Sample PDF
Mathematics in Virtual Knowledge Spaces: User Adaptation by Intelligent Assistants
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Chapter 12
Alexander Krumpholz
This chapter describes the virtual trainer we developed for CSIRO’s temporal bone dissection simulator. This simulation software runs on an... Sample PDF
Building a Virtual Trainer for an Immersive Haptic Virtual Reality Environment
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About the Authors