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RE: Fwd: COMCIFS minutes

As the minutes show, we agreed to ensure that DDLm had at least the same representational capability of DDL2, which it currently does not.  We did not discuss modifying DDL2, and although we could indeed add methods to DDL2, but doing so is unnecessary, and I am inclined to avoid it.

My recollection is that we did agree to exactly what the minutes say, *subject to the aforementioned updates to DDLm being implemented*.  Then there will be one canonical representation for (future) dictionaries, with the ability to automatically create derived dictionary documents in either DDL1 or (especially) DDL2 formalism.


-----Original Message-----
From: comcifs-bounces@iucr.org [mailto:comcifs-bounces@iucr.org] On Behalf Of Herbert J. Bernstein
Sent: Friday, August 29, 2014 7:30 AM
To: John Westbrook; Discussion list of the IUCr Committee for the Maintenance of the CIF Standard (COMCIFS)
Subject: Re: Fwd: COMCIFS minutes. .

But, I thought we agree to ensure the lossless translation of dictionaries between DDL2 and DDLm, so there is no reason not to have DDLm reference dictionaries -- for mmCIF and imgCIF they would be
essentially the same as the DDL2 dictionaries.   in fact the only
thing that is currently missing on the DDL2 side are the methods.  I suspect we can add them in them in to DDL2 a non-conflicting manner.
That would leave only the cleanup on the DDLm side we agreed to to have full interoperability.

On Fri, Aug 29, 2014 at 8:10 AM, John Westbrook <jwest@rcsb.rutgers.edu> wrote:
> Hi James,
> I do not believe that we agreed to the following with respect to DDL2
> -
> ... It was agreed that any new dictionary submitted for COMCIFS
> approval should have a canonical DDLm version. This would not preclude
> development of a dictionary using DDL1, but the reference version upon
> acceptance would be DDLm ...
> Until lossless software translation of dictionaries is possible then I
> do not think that this is a reasonable requirement.
> John
> On 8/28/14, 9:39 PM, James Hester wrote:
>> Dear COMCIFS,
>> Please find attached some draft minutes from our meeting in Montreal.
>> Would those who were present please check them and advise Brian or
>> myself of any errors or omissions.
>> thanks,
>> James.
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