^  Notion                     ^   CVS      ^  Drupal                                                       ^
|  fetch revision             |  checkout  |  fetch node by vid                                            |
|  save revision              |  commit    |  save node as new revision                                    |
|  update from saved          |  update    |  ?                                                            |
|  tag                        |  tag       |  add term_node from a freetagging vocabulary, set by node.vid |
|  branch                     |  branch    |  add term_node from a vocabulary, set by node.nid             |
|  status                     |  status    |  ?                                                            |
|  log of changes             |  rlog      |  list of node.vids / diff                                     |
|  diff to current            |  diff      |  ?                                                            |
|  changes by version/author  |  annotate  |  diff, use uid for matching n.vid                             |