Re: [ubl-dev] Representation of a measurement as a fraction

[Stephen Green <stephengreenubl@gmail.com>]

I gather from what Eric is saying that the CCT for
measure will in many cases result in rounding errors.
Foot and inch length measurements are usually not
only presented in whole units and fraction units but
actually the measurements are made and used this
way so conversion is to be avoided. e.g. 1'  1 1/3"
would result in rounding errors and ordering a piece
of wood, say, using decimals could be a serious
problem. I think Eric has an important issue here.

However, I wonder whether society has already made
steps to avert this, e.g. a ruler typically does not have
thirds or sevenths of an inch but only fractions which
are multiples of two and so the decimal conversion is
helped.

http://wiki.answers.com/Q/Were_is_one-third_of_an_inch_on_a_ruler

Best regards

Steve
---
Stephen D Green




2010/1/20 G. Ken Holman <gkholman@cranesoftwrights.com>:
> Thanks for your post, Eric.
>
> At 2010-01-20 16:25 +0530, ericdes wrote:
>>
>> How would you represent a measurement such as 1"1/4? I don't see anything
>> other than to convert the value into a decimal... Am I missing something?
>
> Indeed the base CCTS data type for a measurement is a decimal value and not
> a string.  In a business document an unambiguous representation is crucial
> to conveying the information accurately.
>
> Thus, the proper *value* representation would be, for example:
>
>   <cbc:Measure unitCode="INH">1.25</cbc:Measure>
>
> Surely the representation as:
>
>   1 1/4"
>
> or
>
>   1" 1/4
>
> ... or any other representation is a presentation issue and not a value
> issue.
>
> Is your concern about data entry or about data presentation?  I think these
> two areas are the only way to address your issue.  For interchange, I'm
> confident the value must be decimal.
>
> I hope this is helpful.
>
> . . . . . . . . .  Ken
>
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