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Re: [ddlm-group] Use of elides in strings
- To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
- Subject: Re: [ddlm-group] Use of elides in strings
- From: Nick Spadaccini <nick@csse.uwa.edu.au>
- Date: Thu, 26 Nov 2009 14:20:18 +0800
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- In-Reply-To: <20091125152051.GA15430@emerald.iucr.org>
On 25/11/09 11:20 PM, "Brian McMahon" <bm@iucr.org> wrote: > In practical terms, the prohibition of the ' and " characters from > non-delimited strings (which I think we have already agreed) is more > of a nuisance, because many existing CIFs have atom labels such as > O1', Ti" (but I am told that according to some chemical naming > conventions use of both single and double quotes in the same label can > occur). Some important crystallographic software still has 4-character > limits on atom labels, so forcing the addition of opening and > terminating quote marks will rather reduce its effectiveness! I don't know how many labels in CIFs contain both but I suspect the number is very small, perhaps zero. We should find out exactly which conventions accept this, and whether they are conventions the IUCr/PDB are willing to deal with. Why is there are problem with the 4 character limit? Since "abcd" is still within the 4 character limit, the " don't count. Are you saying the 4 character limit is in the label in the CIF file? In which case this software must have always assumed an atom label was NEVER in quotes. cheers Nick -------------------------------- Associate Professor N. Spadaccini, PhD School of Computer Science & Software Engineering The University of Western Australia t: +61 (0)8 6488 3452 35 Stirling Highway f: +61 (0)8 6488 1089 CRAWLEY, Perth, WA 6009 AUSTRALIA w3: www.csse.uwa.edu.au/~nick MBDP M002 CRICOS Provider Code: 00126G e: Nick.Spadaccini@uwa.edu.au _______________________________________________ ddlm-group mailing list ddlm-group@iucr.org http://scripts.iucr.org/mailman/listinfo/ddlm-group
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