On 03/31/2015 11:30 AM, Doug Ewell wrote:
Karl Williamson <public at khwilliamson dot com> wrote:
It's a small matter to add code to reduce the UCD-specified rational
numbers, but it's just one more complication to have to deal with
along with the many that the UCD already presents, and if there is not
a good reason the data for these new characters is specified contrary
to mathematical convention, then the data should be changed instead of
having to code around it.
UAX #44, Section 5.9.1 says:
| For all numeric properties, and for properties such as
| Unicode_Radical_Stroke which are constructed from combinations of
| numeric values, use loose matching rule UAX44-LM1 when comparing
| property values.
|
| UAX44-LM1. Apply numeric equivalences.
| • "01.00" is equivalent to "1".
| • "1.666667" in the UCD is a repeating fraction, and equivalent to
| "10/6" or "5/3".
This strongly suggests that the implementation should be changed, not to
match the data, but to match the specification.
Ok. I've made the change.
Is it a problem that DerivedNumericValues.txt doesn't match
UnicodeData.txt in this regard? (That is, the derived file comes with
irreducible rationals)
--
Doug Ewell | http://ewellic.org | Thornton, CO 🇺🇸
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