difference in class

[alleendenechte]

Hello.

While making our inventory (I always look at brikipedia for the background information about the set ) I noticed that there are classes ? Cild being I never wondered about such things but now AFOL I'm curious.... 

[Feanor]

One click on the class would have solved this:

 

These Classes refer to the articles on he sets, not the sets themselves.
It's a rting of the quality of the Brickipedia-entry.

[alleendenechte]

Sorry... didn't think about clicking on it... hahaha. Thanks for your answer!