Hello. I find your post very useful, but I had to change the keyword
field; otherwise, the program never ended. I am using source-highlight
2.11.1. So, you have:

keyword = "andthen|at|attr|case|catch|choice|class|cond",
          "declare|define|dis|div|do|else|elsecase|",
          "elseif|elseof|end|fail|false|feat|finally|for",
          "from|fun|functor|if|import|in|local|lock|meth",
          "mod|not|of|or|orelse|prepare|proc|prop|raise",
          "require|self|skip|then|thread|true|try|unit"

and my changes are:

keyword = "andthen|at|attr|case|catch|choice|class|cond|declare|define|dis|div|do|else|else|case|elseif|elseof|end|fail|false|feat|finally|for|from|fun|functor|if|import|in|local|lock|meth|mod|not|of|or|orelse|prepare|proc|prop|raise|require|self|skip|then|thread|true|try|unit"

Have you think about sending some patch upstream to have Oz support in
source-highlight?

Cheers.