How can I create a role hierarchy in an ER-Diagram?
<p>I know for a recursive relation where there are 2 roles, for example:<br>
<strong>Worker works for Manager</strong><br>
and <strong>Worker and Manager both are 2 roles of Employee</strong>, we show it this way:
<a href="https://i.stack.imgur.com/dFYvL.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dFYvL.jpg" alt="enter image description here"></a></p>

<p>But what if Employee had roles like:<br>
1. Director<br>
2. Manager<br>
3. Secretary<br>
4. Worker<br>
and every role in the lower hierarchy works for the ones in the higher rank.    </p>

<p>For Example:<br>
<strong>Manager</strong> <strong>works for Director</strong>, <strong>Secretary works for Director</strong> and,   <strong>Worker Works for Director</strong></p>

<p>Then again,<br>
<strong>Secretary and Worker also Works for Manager</strong> and so on... </p>

<p>How to show that in the ER DIAGRAM?  </p>