[salud] New version of the ABNF-syntax

[Laura Liess <[e-mail]>]

Hi,

Because we had several changes and discussions which affect the
syntax,  I send a new version to the list, including the rules for
<date>.  I used the <provider-id>,  <MM> and <DD> definitions from the
RFC 4198.
Please let me know what you think of it.

       alert-URN         = "urn:alert:" alert-identifier
       alert-identifier    = alert-category ":" alert-indication
       alert-category    = name/private-name
       alert-indication   = alert-name *(":" alert-name)
       alert-name         = name/private-name
       name                = label
       private-name      = label"@"provider-id["(" date ")"]
       provider-id          = 1*(label ".") toplabel
       date                  = [CC] YY ["-" MM ["-" DD] ]
       label                  = let-dig [ *let-dig-hyp let-dig ]
       let-dig-hyp          = let-dig / "-"
       let-dig                = ALPHA / DIGIT
       YY                    = CC
       CC                    = DIGIT DIGIT
      MM                    = ("0" %x31-39) / ("1" %x30-32)
      DD                     = ("0" %x31-39) / (%x31-32 DIGIT) / "30" / "31"
      ALPHA               = %x41-5A / %x61-7A   ; A-Z / a-z
      DIGIT                  = %x30-39 ; 0-9
      DIGIT-1-9             = %x31-39 ; 1-9
      DIGIT-2-9             = %x32-39 ; 2-9

    Following rules apply to the <date> usage:
       a) A provider is permitted to use any <date> within its domain
name ownership time period.
       b) If the <date> is absent, it defaults to 2013-01-01.
       c) If <DD> or <MM> are absent each defaults to 01.
       d)  If <CC> is absent it defaults to 20.
       e)  Comparison is based on the full <CCYY-MM-DD> after defaults
have been filled in.
       f)   A provider is allowed to use a domain name without a date
if he owns the domain at the default year 2013 or if he is able to
verify that he is the first owner of the domain, e.g. by checking
reliable domain history tools.   Note: We assume that the domain
ownership does not change during the same year.


Thank you
Laura