> What is a use case for this type of SAML Subject? Can someone give a
> real example of a SAML Subject without a name identifier?
Any deployment that doesn't require a message back to the IdP at some point
with the subject in it to reference the original is a candidate for not
including one to begin with. It's just an attribute, if you don't need it,
why use it?
Historically I think SAML 1.1 was wrong to require a NameIdentifier in the
browser profile. 2.0 probably has the same error, but in that case, you need
it for SingleLogout to work.
-- Scott