cmis-parents link is not well described in the rest binding.

The description of Links says the cmis-parents link is of type Feed, and when it exists on a Type, it will be the "Type of P". I assume that means the link will point to the typeDescription of the parent of the type. But that's not a feed. I don't see any type feeds except for TypesChildren and TypesDescendants. So is this a feed of the parent's children i.e. peers)? That's confusing. Is this an entirely new resource undefined elsewhere?