Return-Path: X-Original-To: regext@mail2.ietf.org Delivered-To: regext@mail2.ietf.org Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id 99235FEBE1D5 for ; Wed, 10 Jun 2026 07:18:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ietf.org; s=ietf1; t=1781101080; bh=RGaqfwPvqMDJrmTwnI4afpAuFqb3kIIWdBM1yP0t1Bo=; h=Subject:From:To:Date:References:In-Reply-To; b=arnYHirja1QZVQwdNl5sprdsLy7T/O/pA8g+38gVCpILU8+bDZNMAwjewZfesP7Z4 evpACUhK0S3SFe9WUPXKF9HTWBv9YLyl50C480bh0OjjhL3joid87ogTMG+67MD/k9 CCg3YVRq7wD9EdHsqrwQetdMyjvHxfICb+zvmfxg= X-Virus-Scanned: amavisd-new at ietf.org X-Spam-Flag: NO X-Spam-Score: -4.396 X-Spam-Level: X-Spam-Status: No, score=-4.396 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Authentication-Results: mail2.ietf.org (amavisd-new); dkim=pass (2048-bit key) header.d=verisign.com Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lYGAIK4tBdwT for ; Wed, 10 Jun 2026 07:18:00 -0700 (PDT) Received: from mail6.verisign.com (mail6.verisign.com [69.58.187.32]) by mail2.ietf.org (Postfix) with ESMTP id 177A3FEBE1CB for ; Wed, 10 Jun 2026 07:18:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=verisign.com; l=5244; q=dns/txt; s=VRSN; t=1781101080; h=from:to:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version:subject; bh=RGaqfwPvqMDJrmTwnI4afpAuFqb3kIIWdBM1yP0t1Bo=; b=C5Wm9F/ZswFksbxwZq/bJAfHTdMFxHyMOA4OVTneEAHcgEvMJZFKFVZi ey9ZyHUQ7K2Q84tFfIoyOCRysnxjJHgItNm9/T3ml4kw1Bhmx2vvSTsf7 RNvecZtQ6DSwK0CBOXDeUqzD3SnVMZF/enUGlH9UR1PQ0C4jgAIJlsZ3E dhlau/Mu7nS0xtPhcJ9Mcv1NiAgMFlXEgHVjx1v4YVnwjkCva0STnWhos VkQGWsFaYpsNQVJ6w0mTkBdud8MwBBqfXHnOJcW+O4aF/13h9bwxpTJ39 wnuGMLDXLNbT7EyXRJqtux4odXXIlEHvDKg2R5W6j7vHa/pVsnMpCMkhZ w==; X-CSE-ConnectionGUID: b05J2zufRouEQ85aCVdDjg== X-CSE-MsgGUID: GcEWoHAgSOuF8aLgotM4cg== X-ThreatScanner-Verdict: Negative IronPort-Data: A9a23:g25LgqgxBLuIt3GwnoGfpPU2X161VBEKZh0ujC45NGQN5FlHY01je htvCDyHb62OYDCgco1wYIjn900GvJSDxtNiGwVl/iFhHyIW8JqUDtmndUqhZCn6wu8v7q5Ex 55HNoSfdpBcolv0/ErF3m3J9CEkvU2wbuOiTraCZmYpHFEMpB4J0XpLg/Q+jpNjne+3CgaMv cKai8DEMTdJ4RYtWo4vw/zF8k8HUMja4mtC4ARgPKgT5TcyqlFOZH4hDfDpR5fHatQMdgKKb 76r5K20+Grf4yAsBruN+p7nclcHS6LlJgOHjHxbQcCK2nCucQRrj87XnNJFAatmo23hc+JZk b2hhrTpIesdBZAgrcxGO/VuO3onYfAZou+vzU+X6qR/x2WeG5fl66s2UBFuZeX08M4vaY1F3 aRwxDzg8nlvLg95qV62YrAEuygtECXkFIlH51M63yzXN/E7bKmTHqzh29N03jhl06iiHd6GD yYYQR9OSDuZXDtiCg9OTow1m/2wwHDzNSNCs1TTrq0yi4TR5FUpluKxbpyMJ4bMH5w9ckWw/ woq+0z7DRYHMNC31zef82mtiemJliT+MG4XPOHmr6cw2QzCroAVIDIdeGS8gdC2sWmjdYJWD 0MT5g9ypqdnoSRHSfG4BXVUukWspRccDoYICOQ67wWJx6ze7g2aQGMDSxZNbdU8v4k3SCAkk FiTkLvBDDpjoZWVWWjb66z8hTC1JiERLGwqaSICTABD79SLiJs+gR/fUv5iHbK7yNrvFlnNL yuiqSk6iOwMi8Mbj/z+5k7dxTetvd3DSUg04gqOGHy/9QU/b4mgD2C11WXmAT97BN7xZjG8U LIswqByMMhm4UmxqRGw IronPort-HdrOrdr: A9a23:B9KONK9Iabn+kXV1aKNuk+AFI+orL9Y04lQ7vn2ZLiYlF/Bw9v re/sjzuiWVtN98Yh8dcLO7V5VoKEm0naKdirNhXotKMjOGhEKYaK9v6of4yyDtFmnU5odmuZ tIQuxbBMfrBVZ3yeT38GCDeeoI8Z2i/LqzjenTi01xSxpnApsM0y5iBh2FHlZNSA5KOJo8GP OnjfZ6mw== X-Talos-CUID: 9a23:3QlgeGBLxjeusNn6EyM/qWxOCN0rSHrA4U6AfkaTN2pFSrLAHA== X-Talos-MUID: 9a23:bNqu7wSOMHCmzPZZRXTDjxxdM+dB7J+JFW5dmLEJvNWhaSd/bmI= X-IronPort-AV: E=Sophos;i="6.24,197,1774310400"; d="scan'208";a="46112199" Received: from MILG1WNEX01.vcorp.ad.vrsn.com (10.246.152.21) by MILG1WNEX01.vcorp.ad.vrsn.com (10.246.152.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.37; Wed, 10 Jun 2026 10:17:52 -0400 Received: from MILG1WNEX01.vcorp.ad.vrsn.com ([10.246.152.21]) by MILG1WNEX01.vcorp.ad.vrsn.com ([10.246.152.21]) with mapi id 15.02.2562.037; Wed, 10 Jun 2026 10:17:52 -0400 From: "Gould, James" To: "sah=40sahollenbeck.com@dmarc.ietf.org" , "andy@hxr.us" , "kowalik@denic.de" , "regext@ietf.org" Thread-Topic: [EXTERNAL] RE: [regext] Re: draft-ietf-regext-rdap-x-media-type and draft-ietf-regext-rdap-versioning Compatibility Topic 1: Query Identifiers Thread-Index: AQHc+AdazeJQ0ivkiEeWNbiinsf4h7Y2J5iAgABaFoD//8DGgIAAX0SA///0sgCAAF8rgP//7rKAACLJ7YD//8PxAIAAVNyA///EZgA= Date: Wed, 10 Jun 2026 14:17:52 +0000 Message-ID: References: <2331E2EC-2724-4180-AE01-40E60EAE6BBC@verisign.com> <5b0fe67c-694c-4b0d-85e9-05cfe80d0a05@hxr.us> <3D0593A4-C893-4162-B3D8-ED38AD14A1F4@verisign.com> <8fdba77c-3f25-4e01-901d-8f797756a4e4@hxr.us> <8B84D932-D73E-4CEA-A137-B823C71F3CC7@verisign.com> <7b950404-daeb-4f57-a313-d4b92bf62669@hxr.us> <638BB998-8BC8-48DC-B715-9D33B987E80B@verisign.com> <38958367-d5b1-4f25-b52a-f0a85fb79112@denic.de> <835BCF2B-9B09-4A86-AE80-9A8C24E917F7@verisign.com> <5ca19b9e-7c0f-4dab-b9ae-2ee3b28c6a06@hxr.us> <92648F98-31E6-4CBC-BA07-0AB2D09719BE@verisign.com> <4DFD172C-7037-42E4-99F3-EB97B52B85ED@verisign.com> <32d1bbdb-1674-4ca2-84f0-d636da515b21@hxr.us> <065b7cc2-8cd9-41e1-ac8a-97834ea71445@hxr.us> <001901dcf8e0$32e5b570$98b12050$@sahollenbeck.com> In-Reply-To: <001901dcf8e0$32e5b570$98b12050$@sahollenbeck.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/16.108.26041219 x-originating-ip: [10.170.148.18] Content-Type: text/plain; charset="utf-8" Content-ID: <557A7E510593ED4C9654BE5DF6041AF8@verisign.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Message-ID-Hash: OLAFF3EB6EPEFAFKHUUOBUASG3HDVPOV X-Message-ID-Hash: OLAFF3EB6EPEFAFKHUUOBUASG3HDVPOV X-MailFrom: jgould@verisign.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-regext.ietf.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9rc6 Precedence: list Subject: =?utf-8?q?=5Bregext=5D_Re=3A_draft-ietf-regext-rdap-x-media-type_and_draft-i?= =?utf-8?q?etf-regext-rdap-versioning_Compatibility_Topic_1=3A_Query_Identif?= =?utf-8?q?iers?= List-Id: Registration Protocols Extensions Working Group Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: U2NvdHQsDQoNClRoYXQncyBhIHBvc3NpYmlsaXR5OyBhbHRob3VnaCBvbiB0aGUgRVBQIHNpZGUg d2UgbGltaXRlZCBidW1waW5nIHRoZSBVUkkgdG8gWE1MIHNjaGVtYSBjaGFuZ2VzLCBzaW5jZSBu aXQgdXBkYXRlcyBhcmUgbm90IHJlbGV2YW50IHRvIHRoZSBpbnRlcmZhY2UuICBUaGUgb3RoZXIg aXNzdWUgaXMgdGhhdCBhbGwgdGhlIGVsZW1lbnRzIG9mIHRoZSBleHRlbnNpb24gbmVlZCB0byBi ZSByZXZpc2VkIChlLmcuLCBkcmFmdF88dW5pcXVlIG5hbWU+XzxkcmFmdCBudW1iZXI+XzxtZW1i ZXIxLi5OPikgZm9yIGV2ZXJ5IGRyYWZ0IHZlcnNpb24uICBJIG1heSBiZSB3aWxsaW5nIHRvIGRy b3AgbXkgb2JqZWN0aW9uIHdpdGggaGF2aW5nIHRvIGNoYW5nZSBhbGwgdGhlIGVsZW1lbnRzIHRv IGdldCBwYXN0IHRoaXMgbXVsdGkteWVhciBkZWJhdGUuICBUaGlzIHdvdWxkIGJlIGFub3RoZXIg Zm9ybSBvZiB2ZXJzaW9uaW5nIGluIGRyYWZ0LWlldGYtcmVnZXh0LXJkYXAtdmVyc2lvbmluZywg c2luY2UgaXQncyByZWFsbHkgbm90IE9wYXF1ZSBWZXJzaW9uaW5nIGJ5IGVtYmVkZGluZyBhIHZl cnNpb25pbmcgc2NoZW1lIGRpcmVjdGx5IGludG8gdGhlIEV4dGVuc2lvbiBJZGVudGlmaWVyLiAg VGhlIGFkdmFudGFnZSBvZiB5b3VyIHByb3Bvc2FsIGlzIHRoYXQgdGhlcmUgaXMgYSBkaXJlY3Qg bWFwcGluZyBvZiB0aGUgSS1EIHZlcnNpb24gdG8gdGhlIGV4dGVuc2lvbiB2ZXJzaW9uLCB3aGlj aCB3ZSBkb24ndCBoYXZlIHdpdGggdGhlIEVQUCBjb252ZW50aW9uLiAgDQoNCkkgd291bGQgbGlr ZSB0byBjb25zb2xpZGF0ZSBvdXIgdmVyc2lvbmluZyBkaXNjdXNzaW9uIHRvIGEgc2luZ2xlIGRy YWZ0IGFuZCB3b3JrIHRvd2FyZHMgc29sdXRpb25zIGFzIG9wcG9zZWQgdG8gcmVoYXNoaW5nIHRo ZSBvcGFxdWUgdmVyc2lvbmluZyB2ZXJzdXMgc2VtYW50aWMgLyBtYXR1cml0eSAvIHBvaW50IHZl cnNpb25pbmcgZGViYXRlLiAgTWVyZ2UgZHJhZnQtaWV0Zi1yZWdleHQtcmRhcC14LW1lZGlhLXR5 cGUgaW50byBkcmFmdC1pZXRmLXJlZ2V4dC1yZGFwLXZlcnNpb25pbmcgYW5kIHRha2Ugc29tZSBv ZiB0aGUgYWdyZWVhYmxlIGNvbmNlcHRzIGZyb20gdGhlIHN1Yi1zZWN0aW9ucyBvZiBkcmFmdC1p ZXRmLXJlZ2V4dC1yZGFwLWV4dGVuc2lvbnMgc2VjdGlvbiA1LjQgaW50byBkcmFmdC1pZXRmLXJl Z2V4dC1yZGFwLXZlcnNpb25pbmcuICBXZSBoYXZlIGNvbXBldGluZywgY29uZmxpY3RpbmcsIGFu ZCBpbmNvbXBhdGlibGUgY29uY2VwdHMgc3ByZWFkIHRocm91Z2ggdGhlIHRocmVlIGRyYWZ0cyBv ZiBkcmFmdC1pZXRmLXJlZ2V4dC1yZGFwLXgtbWVkaWEtdHlwZSwgZHJhZnQtaWV0Zi1yZWdleHQt cmRhcC12ZXJzaW9uaW5nLCBhbmQgZHJhZnQtaWV0Zi1yZWdleHQtcmRhcC1leHRlbnNpb25zIHRo YXQgbmVlZCB0byBiZSBjb25zb2xpZGF0ZWQgc28gd2UgY2FuIHN0YXJ0IHdvcmtpbmcgdG93YXJk cyBzb2x1dGlvbnMuICANCg0KVGhhbmtzLA0KDQotLSANCg0KSkcgDQoNCg0KDQpKYW1lcyBHb3Vs ZA0KRmVsbG93IEVuZ2luZWVyDQpqZ291bGRAVmVyaXNpZ24uY29tIDxhcHBsZXdlYmRhdGE6Ly8x Mzg5MEM1NS1BQUU4LTRCRjMtQTZDRS1CNEJBNDI3NDA4MDMvamdvdWxkQFZlcmlzaWduLmNvbT4N Cg0KNzAzLTk0OC0zMjcxDQoxMjA2MSBCbHVlbW9udCBXYXkNClJlc3RvbiwgVkEgMjAxOTANCg0K VmVyaXNpZ24uY29tIDxodHRwOi8vdmVyaXNpZ25pbmMuY29tLz4gDQoNCg0KDQoNCu+7v09uIDYv MTAvMjYsIDk6NTEgQU0sICJTY290dCBIb2xsZW5iZWNrIiA8c2FoPTQwc2Fob2xsZW5iZWNrLmNv bUBkbWFyYy5pZXRmLm9yZyA8bWFpbHRvOjQwc2Fob2xsZW5iZWNrLmNvbUBkbWFyYy5pZXRmLm9y Zz4+IHdyb3RlOg0KDQoNCkNhdXRpb246IFRoaXMgZW1haWwgb3JpZ2luYXRlZCBmcm9tIG91dHNp ZGUgdGhlIG9yZ2FuaXphdGlvbi4gRG8gbm90IGNsaWNrIGxpbmtzIG9yIG9wZW4gYXR0YWNobWVu dHMgdW5sZXNzIHlvdSByZWNvZ25pemUgdGhlIHNlbmRlciBhbmQga25vdyB0aGUgY29udGVudCBp cyBzYWZlLiANCg0KDQpUaGUgbG9uZ2VyIHRoaXMgZGlzY3Vzc2lvbiBnb2VzIG9uLCB0aGUgbW9y ZSBJIGJlY29tZSBjb252aW5jZWQgdGhhdCB0aGVyZSdzIGEgc2ltcGxlIGNvbmNlcHQgaGVyZSB0 aGF0J3MgYmVpbmcgY29tcGxpY2F0ZWQgZm9yIHJlYXNvbnMgdGhhdCBJIHN0aWxsIGRvbid0IHVu ZGVyc3RhbmQuIFRvIHdoaXQ6DQoNCg0KQm90aCBFUFAgYW5kIFJEQVAgZXh0ZW5zaW9ucyB1c2Ug aWRlbnRpZmllcnMgdGhhdCBhcmUgdWx0aW1hdGVseSBhc3NvY2lhdGVkIHdpdGggYSBzcGVjaWZp YyBzcGVjaWZpY2F0aW9uIGRvY3VtZW50LiBJRVRGIGRvY3VtZW50cyBjYW4gYmUgZWl0aGVyIElu dGVybmV0LURyYWZ0cyBvciBSRkNzLCBhbmQgYm90aCB0eXBlcyBvZiBkb2N1bWVudHMgaGF2ZSB1 bmlxdWUgaWRlbnRpZmllcnMuIERyYWZ0cyBhcmUgaWRlbnRpZmllZCBieSBhIHN0cmluZyBhbmQg YSBudW1iZXIsIGUuZy4sIGRyYWZ0LWlldGYtZm9vLTAwLiBXaGVuIHRoZSBkcmFmdCBjaGFuZ2Vz LCB0aGUgbnVtYmVyIGNoYW5nZXMuIFJGQ3MgYXJlIGlkZW50aWZpZWQgYnkgYSBudW1iZXIuIElm IHRoZSBSRkMgY2hhbmdlcywgYSBuZXcgbnVtYmVyIGlzIGFzc2lnbmVkLiBJdCdzIHRoYXQgc2lt cGxlLg0KDQoNClRoaXMgaXMgd2h5IEkgZG9uJ3QgdW5kZXJzdGFuZCBob3cgZXh0ZW5zaW9uIGlk ZW50aWZpZXJzIGZvciBFUFAgYW5kIFJEQVAgY2FuJ3QgZm9sbG93IGEgc2ltaWxhciwgc2ltcGxl IGNvbnZlbnRpb24uIFdlIGNvdWxkIGFncmVlIHRoYXQsIGZvciBleGFtcGxlLCBhIGRyYWZ0IFJE QVAgZXh0ZW5zaW9uIHNob3VsZCBiZSBpZGVudGlmaWVkIGJ5IGEgc3RyaW5nIG9mIHRoZSBmb3Jt ICJkcmFmdF88dW5pcXVlIG5hbWU+XzxkcmFmdCBudW1iZXI+LiBVc2luZyB0aGUgc2FtcGxlIGV4 YW1wbGUgZnJvbSBhYm92ZSBmb3IgYW4gaW5pdGlhbCB2ZXJzaW9uLCBkcmFmdF9mb29fMC4gRXZl cnkgdGltZSB0aGUgZHJhZnQvc3BlY2lmaWNhdGlvbiBjaGFuZ2VzLCB0aGUgaWRlbnRpZmllciBp cyBpbmNyZW1lbnRlZCBqdXN0IGFzIHRoZSBkcmFmdCBudW1iZXIgaXMgaW5jcmVtZW50ZWQuIERy YWZ0IGltcGxlbWVudGF0aW9uIGNhbiBoYXBwZW4sIGFuZCBzZXJ2ZXJzIGNhbiBhbm5vdW5jZSBz dXBwb3J0IGZvciBzcGVjaWZpZWQgZHJhZnQgdmVyc2lvbnMgdXNpbmcgdGhlc2UgdW5pcXVlIGlk ZW50aWZpZXJzLiBDbGllbnRzIGNhbiBjaG9vc2UgdGhlIGRyYWZ0IHZlcnNpb25zIHRoZXkgd2lz aCB0byBpbXBsZW1lbnQgdXNpbmcgdGhlIHNhbWUgaWRlbnRpZmllcnMuIFRoZXJlJ3Mgbm8gbmVl ZCB0byB3b3JyeSBhYm91dCBicmVha2luZyBjaGFuZ2VzIGJlY2F1c2UgZXZlcnkgdmVyc2lvbiBv ZiBhIHNwZWNpZmljYXRpb24gaXMgYXNzb2NpYXRlZCB3aXRoIGEgdW5pcXVlIGlkZW50aWZpZXIu IENsaWVudHMgYW5kIHNlcnZlcnMgdXNlIHRob3NlIGlkZW50aWZpZXJzIHdoZW4gc2VuZGluZyBh bmQgcmVjZWl2aW5nIGluZm9ybWF0aW9uLCBhbmQgbWlzbWF0Y2hlcyBpbiBpbXBsZW1lbnRhdGlv biBhcmUgaWdub3JlZCBvciBmbGFnZ2VkIGFwcHJvcHJpYXRlbHkuIFdoZW4gYSBkcmFmdCBiZWNv bWVzIGFuIFJGQywgYSBmaW5hbCBpZGVudGlmaWVyIChmb29fMCkgaXMgZGVmaW5lZCBieSByZW1v dmluZyAiZHJhZnQiIGFuZCByZXNldHRpbmcgdGhlIHZlcnNpb24gbnVtYmVyLg0KDQoNCldlIG5l ZWQgdG8gZ2V0IHBhc3QgdGhpcy4gS2VlcCBpdCBzaW1wbGUsIHBlb3BsZS4NCg0KDQpTY290dA0K DQoNCg0KDQoNCg==