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Subject: Re: [office-formula] Question on character classes


Eike Rathke wrote:
> Hi Patrick,
> On Saturday, 2009-12-19 11:34:34 -0500, Patrick Durusau wrote:
>> Whirring away on untangling the portability portions but curious about  
>> the use of XML character classes.
>> Makes sense if we are talking about XML text, makes less sense if we are  
>> talking about strings in general. Just use Unicode character classes  
>> with the correct references.
>> Was there some overt reason for choosing XML character classes?
> What exactly are you talking about? Is this about LetterXML, DigitXML,
> ... in the syntax definitions, referring XML10
> http://www.w3.org/TR/REC-xml/ appendix B Character Classes?
> What would be the equivalent Unicode classes?
Well, for DigitXML that would be Decimal digits in the Unicode Character 

I haven't compared the latest DigitXML to Decimal digits in the most 
recent UCD so there may not be a significant difference.

My main concern was if we are talking about supporting the full range of 
characters in Unicode (or at least providing implementations with that 
option) when rather than citing the XML standard and using Unicode by 
indirection, we could also simply cite the Unicode standard.

On the other hand, it may be that the XML summaries on these character 
classes are at least as easy to specify as their Unicode counterparts 
and nearly as complete.

Hope you are at the start of a great week!


Patrick Durusau
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)

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