On Tuesday, June 28, 2022 12:46:18 PM EDT Scott Kitterman wrote:
...
> The operational distinction between a PSD and a non-PSD is that subdomains
> of a PSD are different organizations and subdomains of non-PSDs are part of
> the same organization. I believe that's the correct distinction.
Looking back, I think this is a distinction worth adding to the draft as I
think it will help provide clarity for future readers to resolve any
ambiguities they find in the text correctly.
The PSD definition is probably overlong already:
> 3.2.8. Public Suffix Domain (PSD)
>
> The global Internet Domain Name System (DNS) is documented in
> numerous RFCs. It defines a tree of names starting with root, ".",
> immediately below which are Top-Level Domain names such as ".com" and
> ".us". The domain name structure consists of a tree of names, each
> of which is made of a sequence of words ("labels") separated by
> period characters. The root of the tree is simply called ".". The
> Internet community at large, through processes and policies external
> to this work, selects points in this tree at which to register domain
> names "owned" by independent organizations. Real-world examples of
> these points are ".com", ".org", ".us", and ".gov.uk". Names at
> which such registrations occur are called "Public Suffix Domains
> (PSDs)", and a registration consists of a label selected by the
> registrant to which a desirable PSD is appended. For example,
> "ietf.org" is a registered domain name, and ".org" is its PSD.
My thought is to add text based on the above mail to the paragraph:
PSDs are important to DMARC because subdomains of a PSD are different
organizations and subdomains of non-PSDs are part of the same organization.
Scott K
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