title: Eclipse plugin - Editor associated to file extension and perspective
body: <p>I'm developing tow eclipse plugin, I have the next problem:</p>
  
  <p>I have two perspective that manages the same files. I would like to make an association between file extension - editor - perspective.</p>
  
  <p>I mean if I open the file extension .XXX in perspective 1 it uses the editor A, but if I open the same file extension .XXX in perspective 2, it uses the editor B.</p>
  
  <p>is it possible? Since now, I used the launcher but now I need more differentiation.</p>
  
  <p>Thanks.</p>