The Statement of Conjunctive and Disjunctive Queries in Object Oriented Database with Using Fuzzy Logic

Roghayeh Madani, Ali Harounabadi
2015 International Journal of Computer Applications Technology and Research  
Entrance of object orienting concept in database caused the relation database gradually to replace with object oriented database in various fields. On the other hand for solving the problem of real world uncertain data, several methods were presented. One of these methods for modeling database is an approach wich couples object-oriented database modeling with fuzzy logic. Many queries that users to pose are expressed on the basis of linguistic variables. Because of classical databases are not
more » ... le to support these variables, leads to fuzzy approaches are considered. We investigate databases queries in this study both simple and complex ways. In the complex way, we use conjunctive and disjunctive queries. In the following, we use the XML labels to express inqueries into fuzzy. We can also communicate with other sections of software by entering into XML world as the most reliable opportunity. Also we want to correct conjunctive and disjunctive queries related to fuzzy object oriented database using the concept of dependency measure and weight, and weight be assigned to different phrases of a query based on user emphasis. The other aim of this research is mapping fuzzy queries to fuzzy-XML. It is expected to be simple implement of query, and output of execution of queries be greatly closer to users' needs and fulfill her expect. The results show that the proposed method explains the possible conjunctive and disjunctive queries the database in the form of Fuzzy-XML.
doi:10.7753/ijcatr0407.1007 fatcat:xo5n6k5atfeq5nn6ugcougipfu