Questions about the Canon, Non-Canon, etc, of Cthulu Mythos

[Extreme123dz]

┬┐What is considering Canon?

┬┐What is considering Non-Canon?

┬┐What is exacly the EU and which would come as one?

if and Author Mntions directly and not bastardise, change, etc the original Works is part of the Canon/H.P. Lovercraft?

if HP mentions directly a work a spart of his works stil considering canon? (in the past)

"Original Canon" by renowned authors (Stephen Haukins as an example) based on HP? or mentioning HP and their works, bases and other well be minimal changes for better or worse?

Books -Fans based HP is EU or other media like Fanfics?

which do not mention to HP for anything or alternative things, parallel or out of the original works is EU or Other Things?

http://lovecraft.wikia.com/wiki/Cthulhu_Mythos_(wikia_classifications)#The_.22Lovecraft_Circle.22_Myth_Cycles ┬┐Is This correctly?


sry for the Bad Grammar, sintaxis, English, etc.

 

[Promestein]

To my knowledge we only use Lovecraft's original works, noghing by Derleth and other authors unless Lovecraft has implemented it into his works or something similar.

 

[Azathoth_the_Abyssal_Idiot]

The Cthulhu Mythos' canon is traditionally accepted to be works written by Lovecraft, as well as works written by close friends when he was alive, as long as it was either written for the Mythos setting or incorporated into it by Lovecraft himself.

Anything else is EU.