title: Does this E-R/EER diagram contain correct relationships and cardinalities?
body: <p>I'm making an online store/eCommerce site. I've included basic relationships(1-1,1-M), minmax(1,1 1,N) and participation i.e full or double, Specialization participation. </p>
  
  <p>Note: the double lines represent the full participation.</p>
  
  <p>I've doubt on the following things.</p>
  
  <ol>
  <li><p>For the customer entity, a customer doesn't necessarily need to make an order to browse the products so he can either make no orders or make as many as he/she likes so 0,N (min,max) relationship right?
  At the same time an order can be at a minimum have 1 customer or N customers.</p></li>
  <li><p>Same with the product and order relationship. An order at a minimum can contain 1 or N products. But it's not necessary for a product to be included in every single order hence 0 or N products can be in an order.</p></li>
  <li><p>Regarding the specialization, I only considered it for the product entity which can be further divided into different products. But is it necessary to include the admin and owner as subclasses of super class such as employee etc?</p></li>
  </ol>
  
  <p>Note: The owner entity only exists to view the sales records such profit made in a week,month etc
  And the admin can add,delete or edit products.</p>
  
  <p><img src="https://i.stack.imgur.com/PYyPR.jpg" alt="Diagram"></p>