[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Reply to: [list | sender only]
Re: Variants
- To: "Discussion list of the IUCr Committee for the Maintenance of the CIFStandard (COMCIFS)" <comcifs@iucr.org>
- Subject: Re: Variants
- From: Joe Krahn <krahn@niehs.nih.gov>
- Date: Mon, 30 Nov 2009 12:41:42 -0500
- In-Reply-To: <4B0EB263.1090802@mcmaster.ca>
- References: <279aad2a0911251559q519f0460p4bbf7dd550268712@mail.gmail.com> <alpine.BSF.2.00.0911252113350.30893@epsilon.pair.com> <279aad2a0911252136p286fef16waa38915c2ee09cda@mail.gmail.com><4B0EB263.1090802@mcmaster.ca>
David Brown wrote: ... > Is a CIF a fixed archive, a place > where we entomb a fact of nature, or is it an evolving document that > carries it own history along with it? CIF is becoming the standard data format for working crystallography experiments, not just an archival format. Maybe the goal should be that _variant components can be removed from archival CIFs, in a way that does not complicate non-variant data. To me, the _diffrn_radiation_wavelength_determinaton approach is confusing. The wavelength id is defined mainly for multiple wavelength experiments. Using _variant, multiple wavelengths might be defined like this: loop_ _diffrn_radiation_wavelength_id _diffrn_radiation_wavelength_variant _diffrn_radiation_wavelength 1 final 1.23456 1 prelim 1.25 2 final 1.00 Some suggestions: Maybe use "_variant_id" instead of "_variant_variant"? Maybe the _variant_* items should include an identifier as to what primary value is being varied, when one exists. In this case, the wavelength value is the primary varying value, and all others are derived. Thanks, Joe Krahn
Reply to: [list | sender only]
- Follow-Ups:
- Re: Variants (Herbert J. Bernstein)
- References:
- Variants (James Hester)
- Re: Variants (Herbert J. Bernstein)
- Re: Variants (James Hester)
- Re: Variants (David Brown)
- Prev by Date: Re: Procedure for approving small dictionary updates
- Next by Date: Re: Variants
- Prev by thread: Re: Variants
- Next by thread: Re: Variants
- Index(es):