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Re: [Cif2-encoding] A new(?) compromise position
- To: Group for discussing encoding and content validation schemes for CIF2 <cif2-encoding@xxxxxxxx>
- Subject: Re: [Cif2-encoding] A new(?) compromise position
- From: Brian McMahon <bm@xxxxxxxx>
- Date: Wed, 29 Sep 2010 16:56:03 +0100
- In-Reply-To: <AANLkTin=991tdnoUif0J40hsKZ0iYTf506A4i-Z_rdy2@mail.gmail.com>
- References: <AANLkTin=991tdnoUif0J40hsKZ0iYTf506A4i-Z_rdy2@mail.gmail.com>
On Thu, Sep 30, 2010 at 12:24:45AM +1000, James Hester wrote: > Here is a newish compromise: > > Encoding: The encoding of CIF2 text streams containing only code points in > the ASCII range is not specified. CIF2 text streams containing any code > points outside the ASCII range must be encoded such that the encoding can be > reliably identified from the file contents. At present only UTF8 and UTF16 > are considered to satisfy this constraint. I concur with the principle of this statement (Herbert and John have already demonstrated that some additional drafting effort may be needed to eliminate or reduce ambiguity). It leaves the door open for additional encodings that are deemed to satisfy the constraint of providing self-identification, perhaps through key signatures or hashcodes; but there is then an onus on a community wishing to adopt such an encoding to develop and publish the criteria that make it self-identifying. (I'm not *encouraging* this to happen; the irony of our lengthy debate is that we all seem to be trying to achieve the promulgation of a canonical encoding.) Best wishes 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 _______________________________________________ cif2-encoding mailing list cif2-encoding@iucr.org http://scripts.iucr.org/mailman/listinfo/cif2-encoding
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