anchor.diff:      % key/value tuple of meta information, provided when using special options:
       % couch_db:open_doc(Db, Id, Options).
       meta = []
  -    }).
  -
  -
  --record(att,
  -    {
  +}).
  +
  +
  +-record(att, {
       name,
       type,
       att_len,
  
positive.code:     auth,
      default_fun,
      url_handlers
      }).
  
  
  -record(doc,
      {
      id = <<"">>,
      revs = {0, []},
  
  
negative.code:     json = nil
  }).
  
  -record(index_header, {
      seq=0,
      purge_seq=0,
      id_btree_state=nil,
      view_states=nil
  }).
  
  % small value used in revision trees to indicate the revision isn't stored
  -define(REV_MISSING, []).
  