Abstract
This chapter comprises a fuzzy-set-based extension to XQuery which allows user to express preferences on XML documents and retrieves documents discriminated by their satisfaction degree. This extension consists of the new xs:truth built-in data type intended to represent gradual truth degrees as well as the xml:truth attribute to handle satisfaction degrees in nodes of fuzzy XQuery expressions. XQuery language is extended to declare fuzzy terms and use them in query expressions. Additionally, several kinds of expressions as FLWOR are fuzzified. Finally, an evaluation mechanism is presented in order to avoid superfluous calculation of truth degrees.
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Goncalves, M., Tineo, L. (2010). Fuzzy XQuery. In: Ma, Z., Yan, L. (eds) Soft Computing in XML Data Management. Studies in Fuzziness and Soft Computing, vol 255. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14010-5_6
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DOI: https://doi.org/10.1007/978-3-642-14010-5_6
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