title: Difference between diagram EA et class diagram
body: <p>What is the difference between EA diagram and et class diagram?
  EA diagram shows how our data is stored in the database and the relationships between them. While the class diagram shows the objects that are manipulated in the system, the business classes.</p>
  <p>In the image below, I have presented these two diagrams. Your comments are welcome.</p>
  <p><img src="https://i.stack.imgur.com/2vyUY.png" alt="EA diagram vs class diagram" /></p>
  <p>If the class diagram highlights the objects that must be in the system, how we can specify (Employe, DG, TeamLeader) the Person class at the time of implementation known in the database we have the table Person which is linked to Role and that with the time the data of this table can be modified (add, edit).</p>