title: What's the difference between relational diagrams, ER diagrams and EER diagrams
body: <p>I got confused when someone spoke of relational models when I asked a question about EER models. I've learned about the difference between ER and EER diagrams, but I'd like to understand the whole modelling process... I know EER are enhanced ER models, i.e. ER models with specialization/generalization. </p>
  
  <p>When someone says ER modelling does he also imply EER modelling?</p>
  
  <p>And what about database normalization? Does that only apply to relational diagrams? </p>