The ftplugin directory is for Vim plugin scripts that are only used for aspecific filetype. All files ending in .vim in this directory and subdirectories will be sourcedby Vim when it detects the filetype that matches the name of the file orsubdirectory.For example, these are all loaded for the "c" filetype: 	c.vim	c_extra.vim	c/settings.vim Note that the "_" in "c_extra.vim" is required to separate the filetype namefrom the following arbitrary name. The filetype plugins are only loaded when the ":filetype plugin" command hasbeen used. The default filetype plugin files contain settings that 95% of the users willwant to use.  They do not contain personal preferences, like the value of'shiftwidth'. If you want to do additional settings, or overrule the default filetypeplugin, you can create your own plugin file.  See ":help ftplugin" in Vim.