[DFDL-WG] Fw: stop bit encoding

[Steve Hanson]

Agreed to defer to future DFDL 1.1.

Regards
 
Steve Hanson
Architect, IBM DFDL
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848
----- Forwarded by Steve Hanson/UK/IBM on 23/09/2014 17:37 -----

From:   Steve Hanson/UK/IBM
To:     Mike Beckerle <mbeckerle.dfdl at gmail.com>, 
Cc:     "dfdl-wg at ogf.org" <dfdl-wg at ogf.org>, dfdl-wg-bounces at ogf.org
Date:   16/07/2014 08:51
Subject:        Re: [DFDL-WG] stop bit encoding


That's correct.  This is the example of stop-bit encoding that I have 
referred to in the past. It's actually the FAST (FIX Adapted for 
STreaming) protocol, and not the standard FIX format. 

Regards
 
Steve Hanson
Architect, IBM DFDL
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848



From:   Mike Beckerle <mbeckerle.dfdl at gmail.com>
To:     "dfdl-wg at ogf.org" <dfdl-wg at ogf.org>, 
Date:   15/07/2014 18:34
Subject:        [DFDL-WG] stop bit encoding
Sent by:        dfdl-wg-bounces at ogf.org




The FIX protocols (financial interchange)  make use of stop bit encoding.
I have heard of other places using this also. This is modern, current, 
non-legacy usage.

This is the length encoding where the most-significant bit of a byte is 
used to determine whether there are more ASCII characters or not. The last 
byte will have the most-significant bit of 1, prior bytes most-significant 
bit of 0. Minimum length in this length kind is 1. 

It seems we are missing this lengthKind, which applies only to text in the 
ASCII/US-ASCII encoding.

Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | 
www.tresys.com
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Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 
741598. 
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
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