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Re: [apps-discuss] draft-yevstifeyev-abnf-separated-lists-01.txt

Bjoern Hoehrmann <derhoermi@gmx.net> Mon, 06 December 2010 23:03 UTC

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From: Bjoern Hoehrmann <derhoermi@gmx.net>
To: Julian Reschke <julian.reschke@gmx.de>
Date: Tue, 07 Dec 2010 00:05:08 +0100
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Cc: apps-discuss@ietf.org
Subject: Re: [apps-discuss] draft-yevstifeyev-abnf-separated-lists-01.txt
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* Julian Reschke wrote:
>If we *were* adding features to RFC 5234, the one thing I'm missing most 
>is a shorthand notation for defining a set of characters as a difference 
>from another set, such as
>
>   myoctdigits = DIGIT - ( "8" / "0" )
>
>Without this feature, many people use prose production instead ("<VCHAR 
>except ...>"), or create proper ABNF which then is hard to follow.

(I suppose case-sensitive literals would be the next thing.)
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