\begin{frame} \frametitle{Fourth Normal Form} \begin{exampleblock}{} The relation $$ \sql{Knowledge(\underline{employee}, \underline{programmingLanguage}, \underline{dbms})} $$ is an example of a relation that is in BCNF, but not in 4NF. \medskip The relation has no non-trivial FDs. \end{exampleblock} \end{frame} % \overview{5} \theme{\\Normal Forms and Entity-Relationship Models}