Licence types

If you are looking for suggestions on how you want to order them status wise, I'd say Free would be the simplest version, Standard would be the simplest paid implementation, Professional would be an improvement over Standard and should most likely be feature-filled in a way that will guarantee maximum sales, and Enterprise will be your priciest and probably your lowest selling edition. You can offer students a free upgrade to Standard and perhaps discounts for Professional too. At least, that's a very common approach to licensing, and I assume that's what you were asking about.

1)Professional - for people that "get it", and want the extra functionality that a professional license would provide.

2)Standard - for people that would like to have a "professional" license, but simply can't afford that version, so they "make do". These are the real developers because they have to find work-arounds for arbitrarily omitted features, like a windows service project template.

3)Enterprise - these guys will pay whatever you're asking, and will take feature lists at face value instead of really seeing if the product delivers. Usually costs 5 times (or more) than the "professional" package, and doesn't actually offer anything m,ore tangible than "three free support incidents, a nebulous benefit at best).

4)free - for cheap bastards that wish they could be real programmers, but since they're living in their parents basement, they spend all of their disposable income on donkey kong updates and jolt cola, therefor leaving little room in the budget that will transform them into anything resembling "useful" as far as society is concerned

These are my definitions, and may not necessarily apply to your outlook on life. make changes appropriate to your own "vision".

Sorry, we can't help you here. The definition is definitely up to you!