Re: [DNSOP] draft-liman-tld-names-04
Tony Finch <dot@dotat.at> Wed, 17 November 2010 11:20 UTC
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Date: Wed, 17 Nov 2010 11:20:56 +0000
From: Tony Finch <dot@dotat.at>
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To: Andrew Sullivan <ajs@shinkuro.com>
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Subject: Re: [DNSOP] draft-liman-tld-names-04
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On Tue, 16 Nov 2010, Andrew Sullivan wrote: > > Define what you mean by "normative text". Normative text specifies requirements. (This is the usual meaning of the word.) Text in "DISCUSSION" sections is not normative. RFC 1123 section 1.3.1 says: Under many of the individual topics in this document, there is parenthetical material labeled "DISCUSSION" or "IMPLEMENTATION". This material is intended to give clarification and explanation of the preceding requirements text. It also includes some suggestions on possible future directions or developments. Therefore the "will be alphabetic" phrase is not a requirement, it's part of an explanation of how the syntax works in practice. > But the argument has been that the Discussion segment amounts to a > constraint on the protocol, or anyway may well have been interpreted > that way in running code. We don't know. This is why you need to be clear about the layering. If this constraint had been implemented in low-level non-policy code then IDNA TLDs would not work. There is quite a lot of policy enforcement code that has detailed knowledge of which TLDs are valid, and that is perfectly fine because it is operating at the policy layer not the protocol syntax layer, and is obliged to keep up with changes in allocation policy. > So I read the document as trying to relax that rule just exactly enough > to allow A-labels in the TLDs, without relaxing everything. I believe that no requirement needs to be relaxed to allow A-labels. A clarification might be helpful. What this document does is introduce new syntactic restrictions, by specifying policy-layer stuff as protocol syntax. > There's probably some heuristic software out there that checks the > top-most label, looks for a digit in the first character, and treats the > set of labels as an IP address if there is one. That is blatantly broken. There is no need for any heuristic to tell IP addresses and host names apart. This kind of code should be mocked, not accommodated. > Even if I don't like it, the top level is different from other levels in > the DNS, and we need to be careful there. Careful is for policy not mechanism. Tony. -- f.anthony.n.finch <dot@dotat.at> http://dotat.at/ HUMBER THAMES DOVER WIGHT PORTLAND: NORTH BACKING WEST OR NORTHWEST, 5 TO 7, DECREASING 4 OR 5, OCCASIONALLY 6 LATER IN HUMBER AND THAMES. MODERATE OR ROUGH. RAIN THEN FAIR. GOOD.
- [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Mans Nilsson
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Paul Hoffman
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 ]ke Nordin
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Richard Clayton
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- [DNSOP] Writing rules for French (Was: draft-lima… Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] Writing rules for French (Was: draft-… Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] Writing rules for French (Was: draft-… Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] Writing rules for French (Was: draft-… Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- [DNSOP] clue w.r.t. arabic (was: Re: draft-liman-… Eric Brunner-Williams
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] clue w.r.t. arabic Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Alfred Hönes
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Richard Clayton
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Jaap Akkerhuis
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] draft-liman-tld-names-04 Chris Wright
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Andreas Gustafsson
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews