[mdx] what to trust

[Scott Cantor]

Josh Howlett wrote on 2009-05-08:
> However, metadata-attr-cd only supports attribute assertions. Of course,
> you might be able to achieve a similar effect with attribute assertions,
> but possibly at the risk of overloading the semantics.

Without getting into the substance of this, attribute assertions can have
subject confirmations, and the only real difference between an Attribute
Statement and an Authentication Statement is that the "attributes" are
specialized/predefined in the latter.

-- Scott