> Is there a filetype called *.tmf that vim might use instead of
> the otl to determine file type?
You can take a peek in $VIMRUNTIME/filetype.vim to see how vim
handles files of type "*.tmf" or "*.otl". If there's nothing in
there, Vim may not know about such a filetype. If this is the
case, you can make your own as described in
If the syntax file exists, but just isn't getting identified, you
can simply include the block described in that bit of help.
If the syntax file doesn't exist, it's a tad more work to create
your own syntax file. If its syntax is somewhat close to another
language, you might have luck copying its syntax file as
described in the help at
Hope this gives you some pointers to getting your desired syntax.