The YPA is a directory enquiry system which allows a user to access advertiser information in classified directories.
It converts semi-structured data in machine readable classified directories into a set of indices appropriate to the domain and task, and converts natural language queries into filled slot and filler structures appropriate for queries in the domain. The generation of answers requires a domain dependent query construction step, connecting the indices and the slot and fillers. The YPA illustrates an unusual but useful intermediate point between information retrieval and logical knowledge representation.
January 1997 - December 1999
De Roeck, A., U. Kruschwitz, P. Scott, S. Steel, R. Turner, N. Webb. "The YPA - An Assistant for Classified Directory Enquiries". In B. Azvine, N. Azarmi and D. Nauck (eds.): Intelligent Systems and Soft Computing: Prospects, Tools and Applications, Lecture Notes in Artificial Intelligence (State of the Art Survey) 1804, pages 239-258. © Springer Verlag, 2000. (PDF version here)
Kruschwitz, U., A. De Roeck, P. Scott, S. Steel, R. Turner, N. Webb. "Extracting Semistructured Data - Lessons Learnt". In Proceedings of the 2nd International Conference on Natural Language Processing NLP2000: Filling the gap between theory and practice, Lecture Notes in Artificial Intelligence 1835, pages 406-417. © Springer Verlag, 2000.
Webb, N., A. De Roeck, U. Kruschwitz, P. Scott, S. Steel, R. Turner. "Evaluating a Natural Language Dialogue System: Results and Experiences,". In Proceedings of the Workshop "From Spoken Dialogue to Full Natural Interactive Dialogue - Theory, Empirical Analysis and Evaluation" (at the 2nd International Conference on Language Resources and Evaluation LREC2000), Athens, 2000.
Webb, N., A. De Roeck, U. Kruschwitz, P. Scott, S. Steel, R. Turner. "Natural Language Engineering: Slot-Filling in the YPA". In Proceedings of the Workshop on Natural Language Interfaces, Dialogue and Partner Modelling (at the Fachtagung für Künstliche Intelligenz KI'99), Bonn, 1999.
De Roeck, A., U. Kruschwitz, P. Neal, P. Scott, S. Steel, R. Turner, N. Webb. "YPA - An Intelligent Directory Enquiry Assistant". BT Technology Journal, 16(3): 145-155, 1998. (PDF version here)
The online system is password protected.
Search the classified directory
Udo Kruschwitz, e-mail: firstname.lastname@example.org
© The Udo / last change: 19 August 2005