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