An open discussion list for topics related to the eduGAIN interfederation service.

[Ian Young <ian AT iay.org.uk>]

On 16 Jun 2014, at 13:38, Andy Bennett <andyjpb AT knodium.com> wrote:

> Finally, I think RAs *could* work for us is there was a agreement about
> what the "required" attribute does.

This is what the spec says about isRequired:

> Optional XML attribute indicates if the service requires the corresponding 
> SAML attribute in order
> to function at all (as opposed to merely finding an attribute useful or 
> desirable).

That seems very clear to me; I don't see much room there for disagreement 
about the meaning.

The usual problem we run into with isRequired is that it isn't possible to 
say that you require "either A or B". This comes up if you support both SAML 
1 and SAML 2, of course, because ePTI is expressed as a different attribute 
in the two protocols. There was some interesting discussion about 
meta-attributes at the last REFEDS meeting which might help with that in the 
longer term.

        -- Ian

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