[Openid-specs-fapi] "SHALL" vs. "MUST"

Mike Jones Michael.Jones at microsoft.com
Tue Dec 6 21:30:19 UTC 2016

"SHALL" means exactly the same thing as "MUST", per RFC 2119.  It's "SHOULD" and "MAY" that you should be worried about. ;-)

				-- Mike

-----Original Message-----
From: Openid-specs-fapi [mailto:openid-specs-fapi-bounces at lists.openid.net] On Behalf Of Preibisch, Sascha H via Openid-specs-fapi
Sent: Tuesday, December 6, 2016 9:01 AM
To: Financial API Working Group List <openid-specs-fapi at lists.openid.net>
Subject: [Openid-specs-fapi] "SHALL" vs. "MUST"

Hi all!

I just had a chat with a colleague and he said:

- you know Sascha, I hate to read 'shall' in specifications. I then never know if a product supports it

So my question is: what is the reason for using "shall" instead of "must"?


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