title: What is the meaning of dashed arrow in UML class diagram?
body: <p>What is the meaning of the dashed arrow in a UML class diagram in general?</p>
  
  <p>As an example: What is the meaning of the dashed arrow in this image (from client to ConcreteCommand):</p>
  
  <p><img src="https://i.stack.imgur.com/8epCX.png" alt="enter image description here"></p>
  
  <p>Article: <a href="http://en.wikipedia.org/wiki/Command_pattern" rel="noreferrer">Command pattern</a></p>