title: UML Sequence diagram "Message Duration"
body: <p>I'm drawing a SEQUENCE DIAGRAM o a Public Phone (PP) system. What I am trying to do is :
  - A message for : The caller enters money and sends a call request with the callee phone number
  - A message for : PP Calculates the duration time of the call
  - A message for : PP printing call duration limit to the CALLER
  - A message for : The caller and the callee communicates during the call time calculated --> <strong>this message is sort of a duration message</strong>
  - A message for : PP detecting end of call time
  - A message for : For ending comunication</p>
  
  <p>Below is a picture of what I'm trying to do:</p>
  
  <p><a href="https://i.stack.imgur.com/WCHbx.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WCHbx.jpg" alt="enter image description here"></a></p>
  
  <p>How SHOULD I properly reprensent the Messages (especially <strong>Message 4</strong> and the others after it ) <strong>WITHOUT a LOOP fragment</strong> here ? So that the duration is still obvious with the oblique line ...and that Message 10 is the one closing the duration of Message 4</p>
  
  <p><strong>Edited Diagram</strong>
  <a href="https://i.stack.imgur.com/GXAFs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GXAFs.png" alt="enter image description here"></a></p>
  
  <p><strong>LAST altered diagram</strong>  &lt;--- OK !!!</p>
  
  <p>I think that one sums up what you've both said </p>
  
  <p><a href="https://i.stack.imgur.com/dey60.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dey60.png" alt="enter image description here"></a></p>