Add this to your vimrc: if has("autocmd") autocmd FileType {xml,xslt} setlocal iskeyword=@,-,\:,48-57,_,128-167,224-235 endif "has("autocmd") * This does not rely on extensions; instead it works on any file which the filetype detection identifies correctly. * It only changes the 'iskeyword' value for that buffer, not globally.