\begin{frame}
  \frametitle{Object Relational Mapping}
  
  \begin{alertblock}{Database schemas (tables) are not always ideal}
    \begin{itemize}
      %\item New applications on top of existing schemas
      \item not the same set of constructs and abstractions 
      \item in programming languages: objects, relations, inheritance
    \end{itemize}
  \end{alertblock}
  \bigskip
  
  \begin{goal}{In applications we would like to work with}
    \begin{itemize}
      \item objects / entities
      \item inheritance
      \item relations
    \end{itemize}
  \end{goal}
\end{frame}