[Openid-specs-ab] Definition of required and optional claims? Handling?

[Vladimir Dzhuvinov / NimbusDS]

Several places in spec (mostly on the OpenID request object) mention
"required claim" and "optional claim". I was kind of wondering what
exactly these are until I read section 5.1.3 on handling "acr" claim
requests.

http://openid.net/specs/openid-connect-messages-1_0-09.html#req.obj.veri

Would it make sense to define "required claim" and "optional claim" in a
separate section? Also their handling, if it can be generalised?

Right now I'm not sure about the difference between required and
optional UserInfo claim requests. How is a required UserInfo claim
request to be handled if the data isn't available on the server?

Cheers,

Vladimir
--
Vladimir Dzhuvinov : www.NimbusDS.com : vladimir at nimbusds.com