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RFC 4234, "Augmented BNF for Syntax Specifications: ABNF", October 2005

Note: This RFC has been obsoleted by RFC 5234

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: app

Errata ID: 783
Status: Rejected
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2005-10-13
Rejected by: Peter Saint-Andre
Date Rejected: 2010-11-18

 

 The following clarifications apply to the meta-grammar in section 4.

a) Near the bottom of page 10, the rule:

         repetition     =  [repeat] element

   should say:

|        repetition     =  ( [repeat] element ) / option

   At the top of page 11, the rule:

         element        =  rulename / group / option /
                           char-val / num-val / prose-val

   should say:

|        element        =  rulename / group /
                           char-val / num-val / prose-val

   These changes have the effect to formally disallow
   a <repeat> element in front of an <option>
   -- a senseless construct formerly unexpectedly allowed.

b) On page 11, the last rule:

         prose-val      =  "<" *(%x20-3D / %x3F-7E) ">"
                               ; bracketed string of SP and VCHAR
                               ;  without angles
                               ; prose description, to be used as
                               ;  last resort
   should say:

         prose-val      =  "<" *(%x20-3D / %x3F-7E) ">"
|                              ; bracketed string of:
|                              ;  SP and VCHAR without closing angle
                               ; prose description, to be used as
                               ;  last resort

   This change aligns the comment with the formal rule.

It should say:

[see above]

Notes:

from pending
--VERIFIER NOTES--
Peter: The authors have consensus that these are stylistic issues and therefore are not errors.

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