Fuzzy Functional and Multivalued Dependencies for Frank’s Class of Additive Generators

The Nested List Normal Form for Functional and Multivalued Dependencies

The Nested List Normal Form is proposed as a syntactic normal form for semantically well-designed database schemata obtained from any arbitrary finite nesting of records and lists. The Nested List Normal Form is defined in terms of functional and multivalued dependencies, independent from any specific data model, and generalises the well-known Fourth Normal Form from relational databases in ord...

Mixed Transitivity for Functional and Multivalued Dependencies in Database Relations

An Extension of Semantic Proximity for Fuzzy Multivalued Dependencies in Fuzzy Relational Database

Following the development of fuzzy logic theory by Lotfi Zadeh, its applications were investigated by researchers in different fields. Presenting and working with uncertain data is a complex problem. To solve for such a complex problem, the structure of relationships and operators dependent on such relationships must be repaired. The fuzzy database has integrity limitations including data depen...

Multivalued Dependencies in XML

Functional dependencies (FDs) and multivalued dependencies (MVDs) play a fundamental role in relational databases where they provide semantics for the data and at the same time are the foundation for database design. Since XML documents are closely coupled with relational databases in that XML documents are typically exported and imported from relational databases, the study of FDs and MVDs in ...

Multivalued Dependencies and a 4NF for XML

While providing syntactic exibility, XML provides little semantic content and so the study of integrity constraints in XML plays an important role in helping to improve the semantic expressiveness of XML. Functional dependencies (FDs) and multivalued dependencies (MVDs) play a fundamental role in relational databases where they provide semantics for the data and at the same time are the foundat...