[lpribis]

"INI" is not a specification. All INI parsers are slightly different, such that people refer to any file with

    [Section]
    Key = Value

Format as "INI" or INI-like, including the xdg format.

[tadfisher]

Heck. TOML is a superset of it.

[lionkor]

A subset, any TOML is a valid INI, but not nearly all INI are valid TOML