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Vague Relations in Spatial Databases
Department of Computing Science, Umeå University, Sweden.ORCID iD: 0000-0001-7088-3070
2010 (English)In: Natural Language Processing And Information Systems, Springer Berlin/Heidelberg, 2010, 177-187 p.Conference paper (Refereed)
Abstract [en]

While qualitative relations (e.g. RCC8 relations) can readily be derived from spatial databases, a more difficult matter is the representation of vague spatial relations such as 'near-to', 'next-to', 'between', etc. After surveying earlier approaches, this paper proposes a method that is tractable, learnable and directly suitable for use in natural language interfaces to spatial databases. The approach is based on definite logic programs with contexts represented as first class objects and supervaluation over a set of threshold parameters. Given an initial hand-built program with open threshold parameters, a polynomial-time algorithm finds a setting of threshold parameters that are consistent with a training corpus of vague descriptions of scenes. The results of this algorithm may then be compiled into view definitions which are accessed in real-time by natural language interfaces employing normal, non-exotic query answering mechanisms.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2010. 177-187 p.
, Lecture Notes in Computer Science, ISSN 0302-9743 ; 6177
National Category
Computer and Information Science
URN: urn:nbn:se:kth:diva-66406DOI: 10.1007/978-3-642-13881-2_18ISI: 000284034700018ScopusID: 2-s2.0-77955446685ISBN: 978-3-642-13880-5OAI: diva2:483929
15th International Conference on Applications of Natural Language to Information Systems, NLDB 2010; Cardiff; 23 June 2010 through 25 June 2010

QC 20120306

Available from: 2012-01-26 Created: 2012-01-26 Last updated: 2016-05-02Bibliographically approved

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Minock, Michael
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