From nobody Sun Feb 26 14:16:08 2017 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 4D5811294A0; Sun, 26 Feb 2017 14:16:03 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3] 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 tBwbvLVoV5_w; Sun, 26 Feb 2017 14:15:53 -0800 (PST) Received: from mailhost.informatik.uni-bremen.de (mailhost.informatik.uni-bremen.de [IPv6:2001:638:708:30c9::12]) (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 40DDD1294AC; Sun, 26 Feb 2017 14:15:37 -0800 (PST) X-Virus-Scanned: amavisd-new at informatik.uni-bremen.de Received: from submithost.informatik.uni-bremen.de (submithost.informatik.uni-bremen.de [134.102.201.11]) by mailhost.informatik.uni-bremen.de (8.14.5/8.14.5) with ESMTP id v1QMFYuT029565; Sun, 26 Feb 2017 23:15:34 +0100 (CET) Received: from [192.168.217.113] (p5DCCCDC2.dip0.t-ipconnect.de [93.204.205.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by submithost.informatik.uni-bremen.de (Postfix) with ESMTPSA id 3vWfKy0nZDzDHRc; Sun, 26 Feb 2017 23:15:34 +0100 (CET) From: Carsten Bormann Content-Type: text/plain; charset=utf-8 X-Mao-Original-Outgoing-Id: 509840133.576226-ea67440cccb3d25d780de107b226edcf Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Date: Sun, 26 Feb 2017 23:15:33 +0100 Message-Id: <880044A0-E3F0-436D-BB45-6751A01EDB6B@tzi.org> To: ace@ietf.org, "core@ietf.org WG" , cose@ietf.org, cbor@ietf.org, t2trg@irtf.org X-Mailer: Apple Mail (2.3259) Archived-At: Subject: [Cbor] Constrained Node/Network Cluster @ IETF98: DRAFT AGENDA X-BeenThere: cbor@ietf.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Concise Binary Object Representation \(CBOR\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Feb 2017 22:16:03 -0000 Here is my usual eclectic condensed agenda based on the DRAFT AGENDA for IETF98. Remember that there is still quite some potential for changes. ACE/HOMENET/DISPATCH is a bit of a triple whammy. WUGH on LWIG will pull many constrained networks people off the github discussion. I'm not seeing any other major issues, but please do alert the respective chairs when you see one. All times are CDT (UTC-0500) -- yes, the US will be on DST already for a couple of weeks, while Europe moves over right on Mar 26th. (The browser timezone function still is not yet reinstated on https://datatracker.ietf.org/meeting/agenda-utc, for those who want to listen from remote.) Gr=C3=BC=C3=9Fe, Carsten SUNDAY, March 26, 2017 0900-1700 IRTF*** icnrg, with some t2trg-related items on the = agenda MONDAY, March 27, 2017 0900-1130 Morning Session I Zurich A ART dispatch Dispatch WG Zurich D INT homenet Home Networking WG Zurich C SEC *** ace Authentication and Authorization for = Constrained Environments WG 1300-1500 Afternoon Session I Zurich E/F IRTF*** t2trg Thing-to-Thing Zurich A OPS anima Autonomic Networking Integrated Model = and Approach WG Zurich B RTG bier Bit Indexed Explicit Replication WG Zurich G RTG detnet Deterministic Networking WG Vevey 1/2 TSV tsvarea Transport Area Open Meeting 1520-1650 Afternoon Session II Zurich A SEC tokbind Token Binding WG 1710-1810 Afternoon Session III Vevey 1/2 GEN wugh WGs Using GitHub BOF Zurich E/F INT *** lwig Light-Weight Implementation Guidance WG Montreux 3 SEC curdle CURves, Deprecating and a Little more = Encryption WG Zurich C SEC oauth Web Authorization Protocol WG Zurich G TSV tsvwg Transport Area Working Group WG TUESDAY, March 28, 2017 0900-1130 Morning Session I Zurich C INT *** 6tisch IPv6 over the TSCH mode of IEEE = 802.15.4e WG Zurich D IRTF maprg Measurement and Analysis for Protocols Zurich E/F SEC tls Transport Layer Security WG 1300-1430 Afternoon Session I Zurich C ART *** core Constrained RESTful Environments WG Zurich D INT intarea Internet Area Working Group WG Zurich A RTG babel Babel routing protocol WG 1450-1620 Afternoon Session II Zurich G ART uta Using TLS in Applications WG Zurich E/F SEC *** teep A Protocol for Dynamic Trusted Execution = Environment Enablement BOF 1640-1840 Afternoon Session III Zurich C INT dnssd Extensions for Scalable DNS Service = Discovery WG Zurich E/F TSV taps Transport Services WG WEDNESDAY, March 29, 2017 0900-1130 Morning Session I Zurich A INT *** 6lo IPv6 over Networks of = Resource-constrained Nodes WG 1300-1500 Afternoon Session I Zurich A INT *** lpwan IPv6 over Low Power Wide-Area Networks = WG Montreux 3 TSV tcpinc TCP Increased Security WG THURSDAY, March 30, 2017 0900-1130 Morning Session I Zurich D INT 6man IPv6 Maintenance WG Zurich C IRTF icnrg Information-Centric Networking Zurich E/F RTG rtgarea Routing Area Open Meeting Vevey 1/2 TSV quic QUIC WG 1300-1500 Afternoon Session I Zurich B ART *** cbor Concise Binary Object Representation = Maintenance and Extensions WG Zurich G SEC acme Automated Certificate Management = Environment WG Zurich A TSV tsvwg Transport Area Working Group WG 1520-1720 Afternoon Session II Zurich A OPS v6ops IPv6 Operations WG Zurich D SEC saag Security Area Open Meeting 1740-1840 Afternoon Session III Zurich A RTG *** roll Routing Over Low power and Lossy = networks WG FRIDAY, March 31, 2017 0900-1130 Morning Session I Vevey 1/2 ART httpbis Hypertext Transfer Protocol WG Zurich E/F INT ipwave IP Wireless Access in Vehicular = Environments WG Zurich A OPS anima Autonomic Networking Integrated Model = and Approach WG Zurich C SEC oauth Web Authorization Protocol WG 1150-1320 Afternoon Session I Zurich C ART *** core Constrained RESTful Environments WG From nobody Tue Feb 28 07:17:44 2017 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 130AD1295CA for ; Tue, 28 Feb 2017 07:17:43 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001] 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 hJYkjznOin95 for ; Tue, 28 Feb 2017 07:17:41 -0800 (PST) Received: from p3plwbeout04-01.prod.phx3.secureserver.net (p3plsmtp04-01.prod.phx3.secureserver.net [72.167.218.159]) (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 53A331295C2 for ; Tue, 28 Feb 2017 07:17:41 -0800 (PST) Received: from localhost ([72.167.218.145]) by :WBEOUT: with SMTP id ijWYc9hehYfrlijWYc2qnM; Tue, 28 Feb 2017 08:17:10 -0700 X-SID: ijWYc9hehYfrl Received: (qmail 32488 invoked by uid 99); 28 Feb 2017 15:17:10 -0000 Content-Type: multipart/mixed; boundary="=_81fbe465a5a40173e960266dc549075c" X-Originating-IP: 54.240.196.169 User-Agent: Workspace Webmail 6.6.7 Message-Id: <20170228081708.922104cda20b6f9ada6b25b0ac78cffc.46c013efa7.wbe@email04.godaddy.com> From: To: cbor@ietf.org Date: Tue, 28 Feb 2017 08:17:08 -0700 Mime-Version: 1.0 X-CMAE-Envelope: MS4wfHjqpMaOfOeMrFTMl1bx2ZDb14lxDWLWLjkFuObtzH1fWSiakOoX6Pk4QEdVO6e00wYNM7s7NP3ADPetdIsSw2OclN4K8p+I90jAFzAutdJW5zetWmhW qL6CnaF0ZDho59/UyFPBh/BP+uV+VkhBEpNI+TdKRhA1owqXRhT3iAhZ Archived-At: Subject: [Cbor] Proposal to add a CBOR tag for BCD X-BeenThere: cbor@ietf.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Concise Binary Object Representation \(CBOR\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Feb 2017 15:17:43 -0000 --=_81fbe465a5a40173e960266dc549075c Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"
Here is the text of the markdown file attached:
<= br>
# Proposal to add a CBOR= tag for packed BCD
=
## = Data item:
 - Pack= ed Binary Coded Decimal (BCD)

## Semantics:

&n= bsp;- Encodes a sequence of base-10 digits in a sequence of bytes, each con= taining one digit
   in its high nybble (4 bits) and the next less-significant = digit in its low nybble.
 - A value of 15 in the high nybble of the first byte in th= e sequence indicates a negative number.
 - A value of 15 in the low nybble of the l= ast byte in the sequence is simply discarded.
 - A value between 10 and 14 in any ny= bble indicates that the preceding digit is repeated
   between 2 and 6 addition= al times.
&nbs= p;  
## B= ackground

=
[Packed binar= y-coded decimal (BCD)](https://en.wikipedia.org/wiki/Binary-coded_decimal)
in its various forms i= s a somewhat outdated way to code a sequence of
base-10 digits. It has largely been repla= ced in decimal arithmetic by 
[Mike Cowlishaw's work at IBM](http://speleotrove.com/decimal/), particularly his<= /span>
more compact [= densely packed decimal (DPD)](https://en.wikipedia.org/wiki/Densely_packed_decimal)

   quite a bit more complex.
 - Encoding and decoding = BCD is extremely efficient, and takes very little processor cycles.<= /font>
 - BCD values ar= e human readable in a decoding situation.
 
My immediate use case is to encode and decode standard= decimal numbers in CBOR in a native
Python program. What I have easy access to for the s= ignificand is an array of decimal digits.
BCD seems like the best way to encode this in m= y application, and it occurred to me that CBOR
might benefit by providing a tag specifica= lly for BCD (hopefully in the range 24-255).

In addition, a tag for DPD would make sense, but has = less interest to me, since where decimals
are easily accessible in fixed-length formats, = they can go over the wire in binary form.

Above, I describe BCD semantics that differ slightly fro= m any of the classic BCD forms,
using otherwise wasted space to provide rudimentary run-l= ength encoding.

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