Re: [VCARDDAV] Questions about vCard 4.0 (draft rev-11)

["Javier Godoy" <[e-mail]>]

Hi,

On 2010-06-22 10:05 Simon Perreault wrote:

> On 2010-06-21 22:27, Daisuke Miyakawa wrote:

>> 1-b) How about BEGIN and END?
>> There's no mention about how BEGIN/END should be emitted. Is it ok to
>> use "begin:vcard"?
>
> No. Unless specified otherwise, property values are case sensitive.
> Therefore "begin:VCARD", "BEGIN:VCARD", and "Begin:VCARD" would be
> valid, but "begin:vcard" would not. The ABNF in section 6.1.1 makes this
> clear.
>

I only found the following statement in section 3.2 "Parameter values MAY be 
case sensitive or case insensitive, depending on their definition.", but it 
refers to parameter values, not to property values. I found nothing about 
property values, but this is one of the few cases where a case-sensitive 
string is specified as literal , so I think we do not need a general 
interpretation, but we need to be explicit about case sensitivity..

In section 3.2, ABNF is given as
 vcard = "BEGIN" ":" "VCARD" CRLF

And in section 6.1
 BEGIN-value = "VCARD"

>From section 2.3 of RFC 5234
 ABNF strings are case insensitive .
 To specify a rule that is case sensitive, specify the characters 
individually.
 For example:
   rulename    =  %d97 %d98 %d99

So the ABNF above should be

BEGIN-value = %d86 %d67 %d65 %d82 %d68; uppercase "VCARD"

(and the same in section 3.2).

Maybe we also want to review the ABNF for "Z" and "T" in zone and timestamp.


>> 2) VERSION
>>
>> I think it would be better to explicitly mention that "VERSION:4.0 MUST
>> be just after BEGIN:VCARD line" for better comfortability of actual
>> implementation.
>
> I tend to agree. Unless people disagree, this will be part of the next
> revision.

+1


Regards

Javier