Re: Customizing faces with `defcustom'

[Richard M. Stallman]

    A number of customization groups like matching, view, ispell, ibuffer,
    use `(defcustom ... :type 'face)' for customizing faces.  

These are not faces, they are face-valued variables.

    However, the
    associated tags are not assgined a face like `custom-variable-tag'.

I don't understand that sentence at all, sorry.