I have edited that post, but again: Canon canon is the main canon of a fictional universe, the entire franchise. Just canon is the canon of a part, like some sort of adaption, of a fictional universe, not part of the main canon. In Star Wars, all the movies, novels, comics, games, audio dramas and so on are canon canon, except for a few exceptions, so far. In Spacecenter Babylon 5 everything is canon, too. But in Tolkien's legendarium only the books are canon, the Lord of the Rings movies are an adaption of the books and differ from them a bit, so they're just canon for their own, not in the entire legendarium. Same with Buffy the Vampire Slayer, only the series is canon, not the comics. In some fictional universes, like the Donald Duck comics universe, there is no canon. Did you get it?