title: What connection should I use for a dynamic file
body: <p>I have to create a class diagram for a tree structure of a filesystem.
  I have directory/folder named <strong>myfolder</strong>. In that folder I have two files: <strong>file1</strong>  and <strong>file2</strong>. <strong>file1</strong> will be there forever so I have a composition between <strong>file1</strong> and <strong>myfolder</strong>. On the other hand <strong>file2</strong> will appear and disappear because it is a product of compiled <strong>file1</strong>. When I tell the build file to clean the target <strong>file2</strong> disappears. </p>
  
  <p>What connection should I use between <strong>myfolder</strong> and <strong>file2</strong>?
  What connection should I use between <strong>file1</strong> and <strong>file2</strong>?
  Thank you.</p>