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Vague relations in spatial databases
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för datavetenskap.
2010 (Engelska)Ingår i: Natural language processing and information systems, 2010, s. 177-187Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
2010. s. 177-187
Serie
Lecture Notes in Computer Science, ISSN 0302-9743 ; 6177
Nationell ämneskategori
Datavetenskap (datalogi)
Identifikatorer
URN: urn:nbn:se:umu:diva-109046DOI: 10.1007/978-3-642-13881-2_18ISI: 000284034700018ISBN: 978-3-642-13880-5 (tryckt)OAI: oai:DiVA.org:umu-109046DiVA, id: diva2:856602
Konferens
15th International Conference on Applications of Natural Language to Information Systems, JUN 23-25, 2010, Cardiff, ENGLAND
Tillgänglig från: 2015-09-24 Skapad: 2015-09-17 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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Minock, Michael J

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