the is the lastest and bestest on ABNF now going out for last call.
Carl-Uno
---A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Detailed Revision/Update of Message Standards Working Group of the IETF.
Title : Augmented BNF for Syntax Specifications: ABNF Author(s) : D. Crocker, P. Overell Filename : draft-ietf-drums-abnf-04.txt Pages : 9 Date : 29-Sep-97 Internet technical specifications often need to define a format syntax and are free to employ whatever notation their authors deem useful. Over the years, a modified version of Backus-Naur Form (BNF), called Augmented BNF (ABNF), has been popular among many Internet specifications. It balances compactness and simplicity, with reasonable representational power. In the early days of the Arpanet, each specification contained its own definition of ABNF. This included the email specifications, RFC733 and then RFC822 which have come to be the common citations for defining ABNF. The current document separates out that definition, to permit selective reference. Predictably, it also provides some modifications and enhancements.
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