What does AB and PP tags means?

1

I was trying the swedish grammar analyzer and I saw one word was marked AB and PP. What does that mean?

“Han åkte bil av olika skäl.”
Here is av marked AB and PP. Does PP means preposition?

2

Yes, very likely. No idea about AB though. The tag documentation is unfortunately incomplete.

3

“Han såg ut som en kanon.”

Strange here is som marked as PN and AB.