The procedure needs to be followed is as follows: download GNU idutils 3.2d (mkid,lid,fid,fnid,xtokid) from uncompress and store these files in the directory from where Vim is running. goto the top level directory of the project, and run mkid, it will create ID file in that directory (As it is time consuming process, so be patient). copy this file ID to the directory from where Vim is running. USAGE: Put these lines in your vimrc: The mapping of "_u" and "_n" can be done to some other key as per your preference but I use ^K and ^L for this purpose.