Tag aliases are used to fix a "canonical" version of a tag's name. This feature is used in a few different scenarios:

• Variant spellings, especially for character names: kyuubey → kyubey.
• Synonyms: clavicle → collarbone.
• Artists that have changed their preferred names.

When the antecedent tag (before the arrow) is added to an image, AIBooru automatically removes it and adds the consequent tag (after the arrow) in its place. The antecedent is otherwise treated as being identical to the consequent for searches and some other actions.

Tag aliases differ from implications, where both tags remain on the image. In other words, aliases are for tags referring to the same thing, while implications are for situations where one tag describes a subset of the images belonging to another tag.

You can request that an alias be created by using the bulk update request form.

Chained aliases

Given that A -> B alias exists

• If B -> C gets added
• Then the alias is updated to A -> C

Given that B -> C alias exists

• A -> B aliases are rejected

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