Oh, so... hammering out terminology? Sounds fun scary!

We're missing out on another term: "dubious authenticity", which is used on the page that links to the epilogue. (Though maybe that's just part of the definition of apocrypha? at least on wikipedia it is.)

Fun fact: "post canon" is used in Homestuck itself sort-of. In the adventure map, the section for credits uses that.

I think in this case, we could sorta consider daisy-chaining things:
* Homestuck is canon to the Credits.
* The Credits (and Homestuck) are canon to the Snapchats.
* The Credits (and Homestuck - give or take a couple of errors) are canon to the Epilogues (I would split meat and candy but they interdepend on each other so I can't really do that but trust me if I had a diagram I would okay it'd have arrows and it'd be so great)
* The Epilogues (and the Credits and Homestuck) are canon to Homestuck^2.
* Homestuck^2 (and the Epilogues, and the Credits, and Homestuck) plus the Snapchats, are canon to Beyond Canon.

I might have missed something, but this is sorta a rough idea of what I was thinking. If I drew a diagram it might start looking like inheritance in Object Oriented Programming which is its own kettle of worms.