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RFC 6588, "A URN Namespace for ucode", April 2012

Source of RFC: IETF - NON WORKING GROUP
See Also: RFC 6588 w/ inline errata

Errata ID: 3188
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2012-04-12
Verifier Name: Barry Leiba
Date Verified: 2012-04-13

Section 2, pg.3 says: 

   Declaration of syntactic structure:

   The structure of the namespace for 'ucode' using the hexadecimal
   representation of the identifier is as follows using ABNF [RFC5234].

   UCODE-URN = "urn:ucode:" ucode-name
   ucode-name = "_" ucode-number
   ucode-number = 1*ucode-value
   ucode-value = 32HEXDIG
   HEXDIG         =  DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
   DIGIT          =  %x30-39
                  ; 0-9

It should say:

   Declaration of syntactic structure:

   The structure of the namespace for 'ucode' using the hexadecimal
   representation of the identifier is as follows using ABNF [RFC5234].

   UCODE-URN    = "urn:ucode:" ucode-name
   ucode-name   = "_" ucode-number
   ucode-number = 1*ucode-value
|  ucode-value  = 32UCHEXDIG
|  UCHEXDIG     = %x30-39 / 0x41-46   ; digits 0..9, uppercase A..F
|

Notes:

Note: The above clause is part of the 'ucode' URN Namespace
Registration Template, so the above correction needs
to be applied to the template archived at IANA as well.

Rationale: The maintainers of the namespace intended to admit
only uppercase letters in the hexadecimal representation,
in order to accomodate usage of assigned <ucode-value>s in
case-sensitive XML context; this is specified in other parts
of the RFC, but should be specified also in the formal definition.
According to the ABNF Standard, RFC 5234, string literals in ABNF
are explicitly case-insensitive (cf. page 5 of RFC 5234).

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