Reserved words in rules

I’ve been struggling half the day with a .rules script that simply refused to work, just gave me error messages that I didn’t understand. I finally found the problem: I’ve been trying to declare a variable with the name “triggered”, which apparently is a word that is used for something else. My question now is: Is there any list somewhere of reserved words, ie words that can’t be used for example for variable names? Just so I know what more to avoid :wink: