attrname-format in SAML response with non-standard attributes

Nate Klingenstein ndk at
Fri Aug 26 21:07:26 UTC 2022

> How much should the IdP care about the nameFormat, which in hasty prototypes of these unique attributes, seems to be released with

I'd say about as much as the SP cares about the nameFormat, which given the selected names, is probably zero.  I would send them with either:

> urn:oasis:names:tc:SAML:2.0:attrname-format:basic


> urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified

and certainly wouldn't send

> urn:oasis:names:tc:SAML:2.0:attrname-format:uri

if you can possibly avoid it.

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