title: Update an entire resource collection in a REST way
body: <p>I have a REST URI for a list of resources, something like:</p>
  
  <pre><code>http://foo.com/group/users
  </code></pre>
  
  <p>Each of these users has a sequence number and I want to expose a way to renumber those values for all the users in the collection and make this change available to everyone who accesses the list. Since this is an action on the collection as a whole, I'm not sure how to accomplish this.</p>
  
  <p>I can envision a URL like <code>http://foo.com/group/users?sequence=normalize</code> but neither a <code>PUT</code> nor a <code>POST</code> really makes sense for the whole list, unless I submit the whole collection with the new numbers as the message data.</p>
  
  <p>How can I make an update to an entire collection like this in a RESTful way without having to resend all the updated resources in the collection?</p>