Tardis:Prefixes

Prefixes are used to preface a story name, given as the source for a statement of fact in an article. In the example,
 * The Tenth Doctor once ate a part of a chocolate Easter egg. (TV: Planet of the Dead)

the prefix is TV.

In-universe sources
Prefixes that are used on this site for the citation of stories are:

Out-of-universe sources
Confined mostly to reference sources, the following prefixes may be used in any "real world" article, or in the "behind the scenes" section of an in-universe article. While the in-universe prefixes are strictly by medium, the out-of-universe ones emphasise type of material.

Commentaries
Commentaries are especially tricky, thanks in large measure to the Tenth Doctor's era, where some episodes have multiple commentaries. It's important to use the correct prefix, because, for example, PCOM: Doomsday is a wholly different thing to ICOM: Doomsday.