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

Julian Reschke <julian.reschke@gmx.de> Mon, 06 December 2010 23:05 UTC

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Date: Tue, 07 Dec 2010 00:06:55 +0100
From: Julian Reschke <julian.reschke@gmx.de>
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To: Bjoern Hoehrmann <derhoermi@gmx.net>
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Subject: Re: [apps-discuss] draft-yevstifeyev-abnf-separated-lists-01.txt
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On 07.12.2010 00:05, Bjoern Hoehrmann wrote:
> * 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" )

Where the "0" was supposed to be a "9". It's later over here.

>> 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.)

Indeed.

Best regards, Julian

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