anchor.diff:  			Tid :: binary(),
   			Cid :: binary(),
   			Key :: binary(),
  -			Terms :: [unicode:charlist()]) ->
  +			Terms :: [ixterm()]) ->
       ok.
   term_index_update(_Op, _Tid, _Cid, _Key, []) ->
       ok;
  
positive.code: -include_lib("gb_log/include/gb_log.hrl").
  -include("enterdb.hrl").
  -include("enterdb_internal.hrl").
  %%%===================================================================
  %%% API functions
  %%%===================================================================
  
negative.code: 	    WriteOptions :: binary(),
  	    TableId :: integer(),
  	    Key :: binary(),
  	    Terms :: [{integer(), ixterm()}]) ->
      ok.
  index(DB, WriteOptions, TableId,
        Key, [{ColId, Terms} | Rest]) when is_integer(ColId)->
  