title: What is the eclipse plugin update release mechanism?
body: <p>I want to emulate the eclipse update mechanism in my custom Eclipse RCP Application. So, I want to konw that If Eclipse team updates one plug-in, what they will they do for:</p>
  <ol>
  <li>the version of this plug-in;</li>
  <li>the version of the feature which include this plug-in;( maybe there are so many features ) ;</li>
  <li>the version of the feature which include the feature above;( maybe there are so many features ) ;</li>
  </ol>
  <p>I care more about the features, they will all be rebuild ?</p>
  <p>If anyone knows this, can give me some advice, thanks a lot!</p>