e621 uses a custom wiki engine with basic functionality. All formatting is done via DText.
To create an internal wiki link, wrap the title in two sets of square brackets: [[Like this]].
The e621 wiki has no specific style guide, but here's some general advice for creating wiki pages for tags:
Use h4 for all headers, h6 for sub-headers (not needed for most simple wikis). Bundle any relevant links at the end under a "See also" section.
This is a header
This is a sub-header
Avoid gender-specific wording. Even in cases where gender would otherwise apply (e.g., breasts, genitals), mentioning gender more than once is rarely necessary. Prefer them/their pronouns, "a character", or simply reword it instead.
- A character
of any genderwith blue hair.
- ...between a
hertheir breasts. When the male/herm/dickgirl puts his/hirs penis in the female/herm/cuntboy's pussy after anal with her/hir.Vaginal penetration done immediately after anal.
Gender-specific wording on character wikis is an exception to this, including coined intersex/non-binary pronouns.
Anchors are a special DText function intended mainly for use on the forums (priv+) and wiki. They allow you to create links to "jump" to a certain section of the page when clicked from the same or other pages.
Anchors can be created with a hash sign in square brackets [#somename] and linked with normal wiki links [[#somename]] for links on the same page, and [[somewiki#somename]] for linking from other pages.
(taken from the plant wiki)
Used for any type of plant. h4\.Plant tags: \* [[flower]] \** [[rose]] \** [[sunflower]] \* [[grass]] \* [[holly_(plant)]] \* [[mistletoe]] \* [[potted_plant]] \* [[tree]] h4\.See also: \* [[flora_fauna]] - A broad tag for more animal-like plant creatures ("plant-animals")