On Thu, Feb 07, 2019 at 04:47:01PM +0100,
 Petr Špaček <petr.spa...@nic.cz> wrote 
 a message of 129 lines which said:

> > 4.1.1.  NOERROR Extended DNS Error Code 1 - Unsupported DNSKEY Algorithm
> > 
> >    The resolver attempted to perform DNSSEC validation, but a DNSKEY
> >    RRSET contained only unknown algorithms.  The R flag should be set.
> > 
> > 4.1.2.  NOERROR Extended DNS Error Code 2 - Unsupported DS Algorithm
> > 
> >    The resolver attempted to perform DNSSEC validation, but a DS RRSET
> >    contained only unknown algorithms.  The R flag should be set.
> 
> Why R flag? This is not an error, resolution suceeded,

But without the AD flag.

> and there is nothing to retry. I propose change both cases to "The R
> flag should not be set."

In both cases, because another resolver may know other, different
algorithms and therefore succeed to validate.

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