کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
391101 661343 2008 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flexible querying in a relational framework supported by possibilistic logic
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر هوش مصنوعی
پیش نمایش صفحه اول مقاله
Flexible querying in a relational framework supported by possibilistic logic
چکیده انگلیسی

Traditionally, flexible querying systems are supported by a logical framework that is based on satisfaction degrees. Alternatively, certainty about query satisfaction can also be modelled by possibility and necessity measures. This approach was extended by our group in order to handle the cases of missing information more adequately. In this paper, it is presented how our extended logical framework can be used to support flexible querying on conventional relational databases. The handling of preferences, both inside elementary query conditions and between query conditions, is presented, as well as the extension of the traditional selection, projection and join operators. Motivated examples are provided to illustrate the used concepts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuzzy Sets and Systems - Volume 159, Issue 12, 16 June 2008, Pages 1468-1484