Canon\'ka-nen\ (n.) — a sanctioned or accepted group or body of related works.
There is a huge number of publications on the Warhammer 40,000 universe, some released by Games Workshop and some fan-written. Here on the Warhammer 40k Wiki we only use information and images, charts or diagrams contained in the official publications of Games Workshop, Black Library, Citadel Miniatures, Forge World, White Dwarf , Fantasy Flight Games or Ulisses North America, as well as information and images drawn from all officially-licensed Warhammer 40,000 personal computer, mobile and console video games. We use these sources so that we are able to check in-universe facts, and so that people know where to find more information if they are interested in a subject or wish to view the original source of the information.
All sources for an article should be placed in a separate section at the very bottom of the article clearly labelled Sources using the Source or Visual editor's Heading 2 style. It is very important that all articles on this wiki be sourced and that ONLY officially published canon materials taken from the above approved sources be used to create articles. Fan-created works are fun and sometimes of high quality, but they have no place on this wiki. The only exception to this rule is in the extremely rare instance when fan-made art may be used where appropriate, if of sufficient quality as judged by an Administrator.
Fan-Made Artwork Exception
We no longer allow new fan-made artwork to be added to our pages except in very unique cases that requires permission from a wiki Administrator. Fan-made artwork is defined as any graphical image, diagram or chart that was not derived from one of the officially published sources listed above. However, as we did allow the use of such material in moderate amounts in the past, any fan-made art already present on our pages will be allowed to remain under a grandfather clause. This change in policy took effect as of January 1, 2013.