Using fuzzy sets in flexible querying: why and how?

摘要: The last few years have witnessed a tremendous increase in the use of computers more and domains, need for managing new kinds data providing capabilities storage, access display information. In this respect, one may imagine introducing what is often dubbed “uncertainty” ’into databases. This term refer to two main streams problems. On hand, wants store manipulate incomplete (i.e., available information about attribute values be tainted with imprecision and/or uncertainty some items) . that case, retrieval process will also return results involving (if we are uncertain precise value John’s age, cannot always sure John does (or not) satisfy given requirement context query selecting people on basis their age). other sometimes (and somewhat misleadingly) used referring flexible queries, since then consider there ambiguity pertaining meaning. fact, queries useful describing preferences thus getting an ordered set answers accordingly.