Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-cs-11.txt

[Paul Kyzivat <[e-mail]>]

Tom,

On 5/21/12 10:36 AM, Tom Taylor wrote:
> I'm afraid I don't agree with your interpretation, Paul. The condition
> "ABNF strings are case insensitive and the character set for these
> strings is US-ASCII" connotes the following to me:
>
> RUlename = "abc"
> and
> ruleNAME = "abc"
>
> are the same thing, but
>
> rulename = "abc"
> and
> rulename = "ABC"
>
> are different.

I quoted the relevant sections of 5234 that cause your two last lines 
above to be equal. See further below...

> On 21/05/2012 10:10 AM, Paul Kyzivat wrote:
>> On 5/21/12 9:54 AM, Miguel A. Garcia wrote:
>>
>>> I agree with your proposal of making it an even number in ABNF.
>>>
>>> With respect lack of lowercase letter a-f, (remember that HEXDIG only
>>> allows digits 0-9 and uppercase letters A-F, I don't mind your proposal
>>> of only allowing uppercase A-F. However, I will draw your attention that
>>> the cuss draft does allow both lowercase and uppercase. If we want to
>>> have the same syntax, both drafts should go for the same proposal.
>>
>> According to 5234:
>>
>> DIGIT = %x30-39
>> ; 0-9
>> HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
>> and

The following is a direct quotation from 5234:

>> Literal text strings are interpreted as a concatenated set of
>> printable characters.
>>
>> NOTE:
>>
>> ABNF strings are case insensitive and the character set for these
>> strings is US-ASCII.
>>
>> Hence:
>>
>> rulename = "abc"
>>
>> and:
>>
>> rulename = "aBc"
>>
>> will match "abc", "Abc", "aBc", "abC", "ABc", "aBC", "AbC", and
>> "ABC".

up to an including the example above.

	Thanks,
	Paul

>> So HEXDIG already allows A-F and a-f.
>>
>> Thanks,
>> Paul
>>
> ...
>