anchor.diff:              {undefined, RD, Ctx}
       end.
   
  -%% @spec last_modified(reqdata(), context()) -> 
  +%% @spec last_modified(reqdata(), context()) ->
   %%          {undefined|datetime(), reqdata(), context()}
   %% @doc Get the last-modified time for this resource.
   %%      Bucket requests will have no last-modified time.
  
positive.code:      end,
       "\n",
       case dict:find(?MD_USERMETA, MD) of
           {ok, M} -> 
              lists:foldl(fun({Hdr,Val},Acc) ->
                              [Acc|[Hdr,": ",Val,"\n"]]
                          end,
  
negative.code:         undefined -> [];
          Heads ->
              BucketLink = lists:flatten(format_link(Prefix, B)),
              {ok, Re} = re:compile("</([^/]+)/([^/]+)/([^/]+)>;(\ )?riaktag=\"([^\"]+)\""),
              lists:map(
                fun(L) ->
                        {match,[InPrefix,Bucket,Key,Tag]} =
  