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(2013)LECTURE NOTES IN COMPUTER SCIENCE.8132.p.401-412 Mark abstract Databases model parts of reality by containing data representing properties of real-world objects or concepts. Often, some of these properties are time-related. Thus, databases often contain data representing time-related information. However, as they may be produced by humans, such data or information may contain imperfections like uncertainties. An important purpose of databases is to allow their data to be queried, to allow access to the information these data represent. Users may do this using queries, in which they describe their preferences concerning the data they are (not) interested in. Because users may have both positive and negative such preferences, they may want to query databases in a bipolar way. Such preferences may also have a temporal nature, but, traditionally, temporal query conditions are handled specifically. In this paper, a novel technique is presented to query a valid-time relation containing uncertain valid-time data in a bipolar way, which allows the query to have a single bipolar temporal query condition.

Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-4145801



Author: Christophe Billiet , José Enrique Pons Frías , Olga Pons Capote and Guy De Tré

Source: https://biblio.ugent.be/publication/4145801



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