Relational Instance-Based Learning with Lists and Terms

  • Authors:
  • Tamás Horváth;Stefan Wrobel;Uta Bohnebeck

  • Affiliations:
  • German National Research Center for Information Technology, AiS.KD, Schloβ Birlinghoven, D-53754 Sankt Augustin, Germany. tamas.horvath@gmd.de;Otto-von-Guericke-Universität Magdeburg, School of Computer Science, IWS, P.O.Box 4120, D-39106 Magdeburg, Germany. wrobel@iws.cs.uni-magdeburg.de;University of Bremen, Center for Computing Technologies, P.O.Box 330 440, D-28834 Bremen, Germany. bohnebec@informatik.uni-bremen.de

  • Venue:
  • Machine Learning
  • Year:
  • 2001

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Abstract

The similarity measures used in first-order IBL so far have been limited to the function-free case. In this paper we show that a lot of power can be gained by allowing lists and other terms in the input representation and designing similarity measures that work directly on these structures. We present an improved similarity measure for the first-order instance-based learner ribl that employs the concept of edit distances to efficiently compute distances between lists and terms, discuss its computational and formal properties, and empirically demonstrate its additional power on a problem from the domain of biochemistry. The paper also includes a thorough reconstruction of ribl's overall algorithm.