vim-addon-sml:
very minimalistic sml support:
  - toggle .sml and .sig files
  - override .sml default filetype assignment
  - mlton sml compilation mapping (-> vim-addon-actions)
  - some snipmate snippets
  - % matchit support for some struct / let .. constructs

There is still much left to be done..

I recommend adding this to ~/.ctags file. The default .sml parser provided by
exuberant ctags is not good enough - so I abuse the ocmal parser (which parses
data structures perfectly) augmenting it by sml specific structure, ...
regeulare expressions

--langmap=OCaml:.sml
--regex-OCaml=/^[ \t]*datatype[ \t]+([A-Z'a-z0-9_]+)/\1/d,datatype/
--regex-OCaml=/^[ \t]*and[ \t]+([A-Z'a-z0-9_]+)/\1/d,datatype/
--regex-OCaml=/^[ \t]*withtype[ \t]+([A-Z'a-z0-9_]+)/\1/w,withtype/
--regex-OCaml=/^[ \t]*structure[ \t]+([A-Z'a-z0-9_]+)/\1/s,structure/
--regex-OCaml=/^[ \t]*signature[ \t]+([A-Z'a-z0-9_]+)/\1/S,signature/
--regex-OCaml=/[ \t]*val[ \t]+([A-Z'a-z0-9_]+)/\1/v,val/
--regex-OCaml=/^[ \t]*fun[ \t]+([A-Z'a-z0-9_]+)/\1/f,fun/
--regex-OCaml=/^[ \t]*type[ \t]+([A-Z'a-z0-9_]+)/\1/t,type/