title: Is this usage of extend relationship in a use case diagram correct?
body: <p>I am  developing a mobile application for image search</p>
  
  <p>This is my use case diagram</p>
  
  <p>Actor =Smartphone user</p>
  
  <p>System = client-side application </p>
  
  <p><img src="https://i.stack.imgur.com/8Fwk0.png" alt="enter image description here"></p>
  
  <p>The query is pre-treated in the client-side before being sent to the server (for example the vocal query is transformed to textual query) </p>
  
  <p>should I add this use case to my diagram ?</p>
  
  <p>I think it is may be an extended use cqse like this </p>
  
  <p><img src="https://i.stack.imgur.com/5nLx8.png" alt="enter image description here"></p>