Warhammer Canon Question

I was not sure which thread to put this in but since it is on Canon for Warhammer Fantasy I thought this section would work best. So I have a bit of a specific question here, I know that lore is written in RPG books, such as "Only War" in 40k for example is considered canon from what I know. But what I was wondering are the pre-built campaigns that are made by the developers for the party to play through, are those considered canon in the lore or is it just fannon. And when I ask about the campaigns I'm asking about the story line that was built for it by the developers, I know the choices the characters make don't count as lore.

This is a bit of a odd question but I was just wondering about canon in Warhammer Fantasy RPG and thought I'd ask, thanks in advance to all that take the time to answer my question.