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Re: [ddlm-group] Relationship asmong CIF2, STAR, CIF1 and Python

I am sorry to hear this.

For what its worth, although I assume CIF2 syntax as proposed to COMCIFS would be
compliant with STAR syntax (which I have assumed was due to be revised shortly to
introduce the new delimiters/list structures etc.), it would be useful to clarify the
extent of the relationship, so that we do not find ourselves discussing features that
conflict with this relationship.

For example, I can see the introduction of new delimiters such as r""" conflicting with STAR,
but does a proposal such as the line-folding protocol also conflict with STAR, or is
the relationship such that they share the same syntax as far as the lexer is concerned, and
so the line-folding protocol does not break the relationship?

Who knows?



From: Herbert J. Bernstein <yaya@bernstein-plus-sons.com>
To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
Sent: Thursday, 13 January, 2011 17:17:41
Subject: [ddlm-group] Relationship asmong CIF2, STAR, CIF1 and Python

James has requeested that I formally send a message to this list
about a matter discussed recently in independent email in order
to ensure a record.  At first I declined to do so, but after
reflection, I have decided to do as James has asked.

I have withdrawn my vote in COMCIFS in support of CIF2 going
forward at this time.  I have done so because, after emails
from Nick and Brian, it has become clear to me that I was
making false assumptions about the relationship between
CIF2 and STAR.  I believe that a zero-based discussion is
now needed on what the relationship should be among CIF2,
STAR, CIF1 and Python to best serve the interests
of the crystallographic community.  I do not know what
is best and do not know how long such a discussion may take.
I leave it to James, Nick and Brian to decide if Nick's and
Brian's messages should be posted on this list for the record.

  Herbert J. Bernstein, Professor of Computer Science
    Dowling College, Kramer Science Center, KSC 121
        Idle Hour Blvd, Oakdale, NY, 11769


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