title: is optionality (mandatory, optional) and participation (total, partial) are same?
body: <p>As i know optionality means the minimum cardinality of a relationship which is denoted as optional to optional, mandatory to optional, mandatory to mandatory.. </p>
  
  <p>And Participation denoted as bold line and a normal line. </p>
  
  <p>In the Internet some refer participation as the dependency of the entity to the relationship which is also looks like identifying and non identifying relationship.</p>
  
  <p>and some refer it as the minimum cardinality</p>
  
  <p>What is the correct definitions of those relationships and what is the difference..</p>