On this screen, you are defining your data model. First, you need to define your main types. These are the types that would be re-usable. For example, in a school management app, you may have “pupil” as a main type. That way it can be linked to and reused in other main types such as classes, exams, homework, etc. Sub-types contain anything that is related to a main type and typically does not get re-used […]