title: P4 - Purge File State
body: <p>I'm doing a script for clean history and revision of selected files.</p>
  
  <p>I change the FileType of a binary file to binary+S3, so this file will now just keep the 3 last revision.</p>
  
  <p>When i use this method i always see on my depot files history of others revisions but they are now "purge", instead of using the p4 obliterate function which delete all revisions and dont keep some "purge" revisions.</p>
  
  <p>My question : What is the differents between a file which on all revisions expect 5 are deleted and a file using the +S5 attribute.</p>
  
  <p>Thanks !</p>