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I believe that there is only one: a DDLm dictionary cannot define a dataname containing square brackets, whereas such names are allowed under the CIF2 draft.
Are there any others?
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Re: [ddlm-group] Latest summary of proposed CIF syntax changes
- To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
- Subject: Re: [ddlm-group] Latest summary of proposed CIF syntax changes
- From: James Hester <jamesrhester@gmail.com>
- Date: Wed, 3 Mar 2010 11:46:28 +1100
- In-Reply-To: <20100301103520.GA25391@emerald.iucr.org>
- References: <20100301103520.GA25391@emerald.iucr.org>
I believe that there is only one: a DDLm dictionary cannot define a dataname containing square brackets, whereas such names are allowed under the CIF2 draft.
Are there any others?
On Mon, Mar 1, 2010 at 9:35 PM, Brian McMahon <bm@iucr.org> wrote:
With apologies to Nick for the delay, I have now posted the latest
draft of the revised CIF specification change document (dated 18 February
2010) at
http://www.iucr.org/__data/assets/pdf_file/0005/40775/syntaxchangesproposed20100218.pdf
Nick has drawn my attention to the approach taken in this draft that
many of the restrictions required to CIF2 data files and names that
have been previously discussed on this list are a requirement of the
DDLm application of CIF2.
Hence this document is liberal with respect to what you can have. It
allows for a family of CIF2 applications that imposes minimal name
restrictions, *but such applications cannot be handled in a DDLm, dREL
framework*.
The implication is that if, for example, IUCr journals or other
stakeholders wished to take full advantage of DDLm/dREL (which, after
all, is the primary motivation for this line of development), they
would impose the additional necessary naming restrictions to ensure
that only DDLm/dREL-compliant CIFs were handled in their normal
workflow.
Regards
Brian
_________________________________________________________________________
Brian McMahon tel: +44 1244 342878
Research and Development Officer fax: +44 1244 314888
International Union of Crystallography e-mail: bm@iucr.org
5 Abbey Square, Chester CH1 2HU, England
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