From nobody Mon Aug 17 13:37:57 2020 Return-Path: X-Original-To: cbor@ietfa.amsl.com Delivered-To: cbor@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4694F3A11E2 for ; Mon, 17 Aug 2020 13:37:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.895 X-Spam-Level: X-Spam-Status: No, score=-1.895 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FyTHpbnN5fc6 for ; Mon, 17 Aug 2020 13:37:49 -0700 (PDT) Received: from p3plsmtpa07-05.prod.phx3.secureserver.net (p3plsmtpa07-05.prod.phx3.secureserver.net [173.201.192.234]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 138D23A10FB for ; Mon, 17 Aug 2020 13:37:49 -0700 (PDT) Received: from [192.168.1.49] ([76.167.193.86]) by :SMTPAUTH: with ESMTPA id 7lt6kkqphkxIh7lt6kd6Cw; Mon, 17 Aug 2020 13:37:48 -0700 X-CMAE-Analysis: v=2.3 cv=SPU8q9nH c=1 sm=1 tr=0 a=t2DvPg6iSvRzsOFYbaV4uQ==:117 a=t2DvPg6iSvRzsOFYbaV4uQ==:17 a=IkcTkHD0fZMA:10 a=gKmFwSsBAAAA:8 a=K6EGIJCdAAAA:8 a=ey7ATvvnupcXmTZE4YAA:9 a=v15LZa1yhbqMXTkt:21 a=-4PSTzjWFYep3vxg:21 a=QEXdDO2ut3YA:10 a=nnPW6aIcBuj1ljLj_o6Q:22 a=L6pVIi0Kn1GYQfi8-iRI:22 X-SECURESERVER-ACCT: lgl@island-resort.com Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) From: Laurence Lundblade In-Reply-To: <1FC978C4-5EB5-42D9-B522-28D72FDCA5B9@tzi.org> Date: Mon, 17 Aug 2020 13:37:47 -0700 Cc: cbor@ietf.org Content-Transfer-Encoding: quoted-printable Message-Id: <72CC1398-659B-4934-8851-50B8BB4752E1@island-resort.com> References: <5F695632-CF27-40FF-BC23-E731AAA95771@island-resort.com> <895A3DF8-DF11-479F-9DC6-9EF98465A7E0@tzi.org> <1FC978C4-5EB5-42D9-B522-28D72FDCA5B9@tzi.org> To: Carsten Bormann X-Mailer: Apple Mail (2.3608.80.23.2.2) X-CMAE-Envelope: MS4wfJcjXT0W6Q5FbcXUwUr2oQEDOKblPFHZUDpvomgh4ndyuEpY3hzQzqzmf/Ck4n2iCWF9ZpMrzygpLRApJ1pLuYU+lSakqgCG3oEO1gzLjcVI21Ez/ell kZEBQNtDglMNjpHNxPOuztU9M6FIaSkyT+3uOLP53FD831bbx1pY+cBJgjT9EtY6GNRjuixu5F5F5w== Archived-At: Subject: Re: [Cbor] Tagging requirement X-BeenThere: cbor@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Concise Binary Object Representation \(CBOR\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Aug 2020 20:37:56 -0000 > On Aug 17, 2020, at 11:23 AM, Carsten Bormann wrote: >=20 > On 2020-08-17, at 19:56, Laurence Lundblade = wrote: >=20 >> with value 1 followed by the content which is a number. >=20 > Yes. >=20 >> Unless explicitly allowed, the type 6 integer and number content are = inseparable.=20 >=20 > As long as you are talking about Tags, yes: Tags are a major-type 6 = container. > You can also borrow the definition of a Tag content data structure for = an application protocol, but then you aren=E2=80=99t using a Tag, you = are using the definition of a Tag content data structure (or =E2=80=9Can = unwrapped tag=E2=80=9D, if you must say so). What do you think about defining CBOR protocol items that can be either = tag-contained or unwrapped? In CDDL, =E2=80=9Cdualistic_bigfloat =3D = bigfloat / ~bigfloat=E2=80=9D.=20 Making a distinction in the way CWT is defined and named from the way = epoch date, bignum and such are defined is what clears it up for me. The definition of the CBOR structure for CWT is independent of the CWT = tag. The CBOR structure for the CWT is defined first. Then the tag = definition comes a long and says is contents is a CWT. For tags epoch date, bignum and such there is no independent definition = of the contents. That content definite is wrapped up with the tag = definition. If you want to use the content without a tag-container you = have to unwrap it. That a tag is a =E2=80=9Ccontainer=E2=80=9D is really helpful to me. Thanks for the discussion on this! LL