An extension of the use of biblical canon as a metaphor, apocrypha is that which is not truly part of the Canon, but is nonetheless useful information for fans of the subject, and are valid when used to support an argument. What is canon and what is apocrypha (and for that matter what is just Fanon) can be a hard line to draw; subscribers to the Death of the Author theory would discount as canon everything that is not in a primary source (i.e. the finished work as presented), and declare any Word of God or secondary sources, even author-approved ones, to be apocrypha. Others may consider Word of God to be just as canon as the work itself, and only start calling apocrypha at Word of Saint Paul. Word of Dante adds another complication; if a lot of people accept something as essentially canon it could potentially be regarded as Apocrypha, although others would say that because God Never Said That it is, and can only be, fanon. Some works, such as the old Star Wars Expanded Universe (now Star Wars Legends), adopted a model of "tiered canon". The work itself is always considered "top level" canon, sometimes including Word of God in there as well, and then working its way down through various types of secondary and tertiary sources. Anything within a work is considered canon unless it is contradicted by something in a higher tier. Thus, all tiers below the first would be considered apocrypha with regards to any tiers above them, and canon to those below. Super Trope to Word of God, Word of Saint Paul and Word of Dante, Expanded Universe, Dummied Out and Deleted Scene, and all adaptation tropes such as Novelization and Licensed Game (since an adaptation is Apocrypha to the original work). Related to Death of the Author.
- Don Rosa originally wanted to do a prologue to The Life and Times of Scrooge McDuck that would show the whole history of the Clan McDuck. His editor had it cut while it was still in sketch form, and Don has since changed a few things, making the sketched pages not quite fit with his timeline anymore. However, they are still considered a "semi-official" source in the Disney comics fandom.
- As mentioned above, the Expanded Universe for Star Wars used a tiered canon system. However, ever since Disney took over the franchise and rebooted the whole thing to just the original movies, what was once Apocrypha has now been shunted off into Alternate Continuity, under the name Star Wars Legends.
- The Apocrypha or the Deuterocanon The Bible is the Trope Namer for this, although in the Catholic Bible, some books such as Tobit, Judith, and the Maccabees are considered canon.
- Opinion is divided as to the status of Discworld ephemera such as the yearly Diaries and Guild yearbooks: some fans see it as canonical and others as merely optional.
- Memory Alpha, the fan-run wiki for Star Trek, uses this term as a section header for information on canon items' appearances in Expanded Universe materials (e.g. Pocket Books' novels and Star Trek Online), which IP owners CBS and Paramount do not consider canon. The wiki for those materials, Memory Beta, in turn uses it for a group of Tabletop RPG supplements that were in the process of being published by Last Unicorn Games when they lost their Star Trek license.
- Warhammer 40K: It is heavily hinted that the Omnissiah worshipped by the Adeptus Mechanicus on Mars is the C'tan Void Dragon, trapped there after its defeat by the Emperor (incidentally giving rise to the legend of Saint George and the Dragon). Fans go right ahead and make the higher-ups perfectly aware of this, deliberately sending Mechanicus expeditions to their doom to wake up more Necron tomb worlds.
- In Pokémon games, the names for the protagonists used in promotional material are never official, and the Canon Name for each playable character is only revealed when you meet them as an NPC while playing as the opposite gender. However, in Pokémon Sun and Moon the opposite-gender character never appears, so the promotional placeholder names of "Elio" and "Selene" are considered to be the closest to canon we have.
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