What's the difference between "has_active_tradition" and "has_tradition"?

[enderaoe]

The two different types of triggers seem to work differently. In the Stellaris Dev Diary #222 I found some description:

• We deleted has_non_swapped_tradition and has_tradition_swap, and consolidated them into has_active_tradition. Modders: do a search-replace!

I can hardly find any other information about the difference between those 2 types of triggers.
What's the core difference?

 

[Ryika]

has_tradition can only check for non-swaps and will return true regardless of whether you have the base tradition or a swap.

has_active_tradition takes either a base tradition or a swap (unless the swap only changes the texts), and will return true only if you have the exact version of the tradition that you're entering.