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Re: Backus-Naur Form for CIF

  • To: Multiple recipients of list <comcifs-l@iucr.org>
  • Subject: Re: Backus-Naur Form for CIF
  • From: Brian McMahon <bm@iucr.org>
  • Date: Sat, 30 Sep 2000 18:21:59 +0100 (BST)
In accordance with Herbert's suggestion, I have posted Nick's most recent
copy on the IUCr page at

I shall post notice of its location and Herbert's protocol to cif-developers
and mmciftools, and via Crystallography Online "What's New". Suggestions for
other suitable places to post will be welcome.


On Thu, Sep 21, 2000 at 09:54:29PM +0100, Herbert J. Bernstein wrote:
> Dear Colleagues,
>   May I request some time to carefully review Nick's BNF.  This is a very
> important document which will be used by many software developers.  I
> would like to suggest that we follow an orderly process:
>   1.  The document with its recent corrections should be posted to an IUCr
> page for comments and suggestions by not only the COMCIFS membership, but
> by appropriate interested technical consultants, for at least 30 days.
>   2.  If significant changes are made, the clock should be restarted until
> a stable version has been posted for at least 30 days.
>   3.  Then we should vote.
> I for one will not be able to make the necessary rigourous tests (i.e.
> using this BNF with real programs) until I am back from England in
> October.