Selective Cannon
"It means to choose the aspects of tales from an established series that best reinforce that series".

um what you mean?, be more clear please

Selective Cannon is the only Cannon X-Men Films can use.

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Hmm... So the TRUE X-Men Franchise History is : X-Men First Class , X-Men + X-Men II = X-Men Days of Future Past. I like Bryan Singer's Logic. He Dumped X-Men Origins, The Wolverine & X-Men III The Last Stand in the Dumpster. LMAO.
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X-Men 3 and Wolverine are still canon, as Days of Future Past is a sequel to those films (and First Class)

whatever or not origins is still part of the canon is unknown

SIlent hill?...Have you seen a ittle girl ,black hair?