Specifications for an ordering question

This question type is used when learners are required to indicate the correct sequence from a list of items. An example of the published view of an ordering questions is provided below.

inline:Ordering.jpg

Requirements

1. Item does not check for two or more answers with the same sequence allocation.
2. In edit mode - the item does check for duplicate numbers in the sequence.
3. Users can change their selection before submitting the answer
4. Answer is not "marked" until user presses the submit button.
5. When published - each alternative in the pull-down menu defaults to the maximum number of alternatives in the sequence.
6. Hint is optional
7. Optional feedback button is not activated until users have submitted their answer.
8. Correct answer text is generated automatically - eg Correct answer is: (1) <String> (2) <String> (3) <String> etc. Alternatively we could investigate a more sophisticated correct answer display on the web interface that automatically loads the correct responses in a different background colour?
9. Optional feedback is a show/hide type text indicating why the answers are correct/incorrect as generic feedback.
10. The ordering item should have the optional setting of randomising the sequence of alternatives each time it is published.