questions re the ChainingMetadataProvider type

[Cantor, Scott]

> The SP doesn't allow them at all on Chaining providers and I'd like to do
> something like that in the IdP but it gets grubby because there is an implied
> chaining filter at the top level of each <MetadataProvider> so you may not be
> getting what you expect.  I don't have enough deployment experience to make
> the call, but when Scott gets back he will no doubt have some comments to
> offer..

We don't/can't easily disallow it in the schema, but the setter on the actual class throws. The SP doesn't have the schema to enforce it with, and it's the same there, it's just constructor-throws rather than property based. Obviously we could do more warnings if we wanted, but it's not crucial since we don't even intend people wire Chaining up any more.

-- Scott