Quiz

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I think it might look more like multiple choice and be easier to implement if we use a special character at the beginning of the question text.  I did this for the order question.  It has some drawbacks, because it could cause problems for questions where the question text starts with that character.  I chose '>' for order and no one has complained about it in the last three years, although I have no idea how many people are using GIFT import for the order question type.  I think '*' might be too common, but we could choose something like '&' or '^' that's less likely to occur at the beginning of someone's question text.  Then the format would look like percentage-less multiple choice:

&Question text. {~Distractor 1 ~Distractor 2 =Correct 1 =Correct 2 =Correct 3}

It won't be quite standard GIFT, but I think that's okay and it makes it easier to implement.  I don't think I'll have a chance to work on this in the next few weeks, but if anyone wanted to try to write the gift import/export functions, I'd be happy to review them.  To get an idea of where to start, look at the gift import/export functions in the contributed order question type (which uses the extra character) and look at how multiple choice is read in in the core code (in the directory questions/format/gift/).  A few things to keep in mind:

• As a holdover from how multichoice percentages are stored, it's necessary to have the distractors have grade 0 and the correct answers have grade 100 (not 1).
• GIFT import tries all import functions from contrib question types one after the other to see if any of them can read in the question successfully.  Because of how this works, the multichoiceset GIFT import function needs to return false when it hasn't found the special character that indicates that this is a multichoiceset question.  If you don't return false in the right cases, you can screw up GIFT import for other question types, including core question types.