title: CouchDB, how to get document changes only
body: <p>Using <code>/_changes?filter=_design</code> I can get all the changes for <em>design</em> documents.</p>
  
  <p>How do I get all the changes for documents only?</p>
  
  <p>Is there such a thing like <code>/_changes?filter=_docs_only</code> ???</p>