Hi, I'm trying to define a new question type, however I'm a bit lost on how the application is structured I can't seem to find where existing question types are defined and how are they rendered.

Could some one point me to or give me a quick overview of the files involved and the general workflow for rendering questions that could get me started with adding/creating a new question type?

Files that I've identified are:

- Question.php (Models)
- em_manager_helper.php (helpers/expressions)
- The templates (not sure how the variables in there get set though)

Many thanks in advance.

qanda_helper.php