Re: [dmarc-ietf] WGLC on draft-ietf-dmarc-arc-protocol-16

[Steven M Jones <[e-mail]>]

It's been quite a while since my last full read-through of the spec, so 
apologies if I blunder into anything long-settled. And apologies if I'm 
repeating something from earlier commentary, I'm trying to get in under 
a very liberal interpretation of the deadline as is... ;)



Love the way Section 2 introduces and describes the basics.


Section 3.1 - I would suggest "the three header fields /from a 
particular Internet Mail Handler/ compose a single ARC Set." (Addition 
in /slashes/.) Best to be explicit that ARC sets are organized by 
(outdated term) ARC Intermediary. Or "Sealer," but that would be a 
forward reference...  But without this, the reader might be left 
scratching their head until Section 5.1 makes it clear that an ARC Set 
is created by a single entity.


Section 4.2 - I would suggest "An `ARC Set` is a single collection of 
three ARC Headers (AAR, AMS, and AS) /from a single ARC Sealer/." Same 
reasoning as previous.


Section 4.3 - Typo, "AS header fields allow messages handlers" - 
"messages" should lose the trailing "s" (or I suppose it could be 
modified to "allow a message's handlers" if that's what was intended...)


Section 5.2 Step 1 -- Because of the preceding reference to maximum 
number of ARC Sets, rephrase for clarity at the end, "In the following 
algorithm, the /highest instance value ("i=") present in the ARC being 
processed is referred to as `N.`/"



That's it. Great work -- what a long way this has come since oar-dev 
started up in 2014!
--Steve.