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Re: [Cif2-encoding] [ddlm-group] options/text vs binary/end-of-line. .. .. .. .. .. .. .. .. .. .. .. .. .. .
- To: Group for discussing encoding and content validation schemes for CIF2 <cif2-encoding@xxxxxxxx>
- Subject: Re: [Cif2-encoding] [ddlm-group] options/text vs binary/end-of-line. .. .. .. .. .. .. .. .. .. .. .. .. .. .
- From: James Hester <jamesrhester@xxxxxxxxx>
- Date: Fri, 3 Sep 2010 12:54:36 +1000
- In-Reply-To: <alpine.BSF.2.00.1008260723260.11865@epsilon.pair.com>
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Herbert, you will note that I carefully wrote "de-facto" ASCII, by which I mean that virtually, if not all, software for doing "useful work" with CIF, such as structural display programs, syntax checkers, refinement programs etc. read and write ASCII only. So while you can produce an EBCDIC or UTF16 encoded CIF1 file and proudly proclaim that it is CIF1 conformant, good luck in your quest to do useful work with it: you won't be able to input it as a starting model in any crystallographic packages, CheckCIF will complain, you won't be able to display the structure in all those nice programs...so in practice you are restricted to ASCII. As an additional and far more significant restriction, regardless of your CIF1 encoding, you must use only characters appearing in the ASCII character set in your CIF file. My point being that UTF8-only CIF2 is *less* restrictive than the successful CIF1 standard, because more code points are available, with the same range of encoding schemes (i.e. effectively *one* encoding only). If the only non-UTF8 use case will be imgCIF (that would appear to be the only non-ASCII use case for CIF1), we need to discuss this explicitly. On Thu, Aug 26, 2010 at 9:24 PM, Herbert J. Bernstein <yaya@bernstein-plus-sons.com> wrote: > Um, but CIF1 is _not_ ascii-only. It is text in any acceptable local > encoding. > > ===================================================== > Herbert J. Bernstein, Professor of Computer Science > Dowling College, Kramer Science Center, KSC 121 > Idle Hour Blvd, Oakdale, NY, 11769 > > +1-631-244-3035 > yaya@dowling.edu > ===================================================== > -- T +61 (02) 9717 9907 F +61 (02) 9717 3145 M +61 (04) 0249 4148 _______________________________________________ cif2-encoding mailing list cif2-encoding@iucr.org http://scripts.iucr.org/mailman/listinfo/cif2-encoding
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- Re: [Cif2-encoding] [ddlm-group] options/text vsbinary/end-of-line. .. .. .. .. .. .. .. .. .. .. .. .. . (James Hester)
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