Spread the loveAs the name suggests, a relational data model is a data model that describes data in terms of its relations. This model was developed by Edgar F. Codd, an IBM researcher, in the 1970s.

In the typical relational model we would further impose the constraint that rows consist of flat sequences of scalar values (the so-called First Normal Form, or 1-NF). If we dualize relations in 1-NF, ...

Abstract: In order to deal with complex as well as uncertain information, in this paper, we introduce fuzzy data into nested relational database model, where data fuzziness appears in forms of ...

Data interchange on the Web is a common task today and XML has been the de-facto standard of information representation and exchange over the Web. Also information imperfection is inherent in the real ...

The Nested Set Model is an approach to storing hierarchical data structures in relational databases. It is an alternative to more common Adjacency List Model. The Nested Set Model has a clear ...