The library and artifacts

Word	Meaning
Asset	One thing kept in a project's library, such as a logo or a screenshot, with all its files.
Variant	One file of an asset: a size, a theme, a language.
Artifact	Something a version delivers: a package, a binary, a container image or an archive. Immutable once uploaded.
Withdrawal	Taking an artifact out of use, with a reason. Permanent.