how to hightlight a kind of special filetype docs in vim

Peter74

suppose the filetype is en. Then, write a file
~/.vim/syntax/en.vim with contents as follows:
syn case ignore
syn region enIdentifier start=/`/ end=/`/
syn region enString start=/"/ end=/"/
syn region enType start=/</ end=/>/
syn region enUnderlined start=/|/ end=/|/
syn sync minlines=10
syn case match

hi def link enIdentifier        Identifier
hi def link enString    String
hi def link enType              Type
hi def link enUnderlined Underlined
let b:current_syntax = "en"
----------- end of en.vim ---------------

we also need another file
~/.vim/filetype.vim :

        augroup filetypedetect
        au BufNewFile,BufRead *.en      setf en
        augroup END
----------- end of filetype.vim ---------

more helps refer to these:
:h hightlight
:h syntax
:h usr_44.txt

enjoy!

Peter74

Maybe it should be better in this way:

syn case ignore
syn region enConstant start=/</hs=e+1 end=/>/he=s-1
syn region enType start=/`/hs=e+1 end=/`/he=s-1
syn region enString start=/|/hs=e+1 end=/|/he=s-1
syn region enTodo start=/@/hs=e+1 end=/@/he=s-1
syn sync minlines=10
syn case match

hi def link enConstant         Constant
hi def link enString        String
hi def link enType                 Type
hi def link enTodo                 Todo
let b:current_syntax = "en"

Peter74

syn region enConstant start=/</hs=e+1 end=/>/he=s-1 contains=ALL keepend
syn region enType start=/`/hs=e+1 end=/`/he=s-1 contains=ALL keepend
syn region enStatement start=/|/hs=e+1 end=/|/he=s-1 contains=ALL keepend
syn region enTodo start=/@/hs=e+1 end=/@/he=s-1 contains=ALL keepend