On Fri, February 20, 2009 11:51 pm, Christoph LANGE wrote: > Dear James, dear Jonathan, dear all, > An easy one first: I didn't find a concrete example for prefixing, but > may I > assume that the following is correct? > > <!-- 1 kilometre --> > <OMA> > <OMS cd="arith1" name="times"/> > <OMI>1</OMI> > <OMA> > <OMS cd="units_ops1" name="prefix"/> > <OMS cd="units_siprefix1" name="kilo"/> > <OMS cd="units_metric1" name="metre"/> > </OMA> > </OMA> That's right. > Then, how about compound units? There are some convenience symbols like > metres_per_second, but what do we need them for? Wouldn't it make more > sense > to do without them (as you suggested to do without metre_squared) and > write instead: <snip>divide</snip> It probably would do. As and when we can declare individual symbols obsolete, I will propose doing so to MOST of these - memroy says there are some odd ones, but i can't remember offhand.
> BTW, does your unit converter > (http://klein.activemath.org:90/~jonathan/units/converter.php) support > such compound units for which no explicit symbol has been defined? One for Jonathan. > Then, a final question about that unit converter: I can convert hours to > minutes, but for minutes to seconds, and hours to seconds, it tells me Ditto this one. >> The two units were known, but found to be different dimensions. Please >> supply a definition for the units to reconcile this difference, >> remembering >> to ensure the new definition has a different name. >> >> 1 hour to second is incalculable. > > Is there any better place for reporting this bug? > > BTW, we are planning to add a unit conversion service to our active > document framework (https://jomdoc.omdoc.org/wiki/JOBAD); see > https://jomdoc.omdoc.org/ticket/254 if interested in further details. Thanks for this. James Davenport Visiting Full Professor, University of Waterloo Otherwise: Hebron & Medlock Professor of Information Technology and Chairman, Powerful Computing WP, University of Bath OpenMath Content Dictionary Editor IMU Committee on Electronic Information and Communication _______________________________________________ Om mailing list [email protected] http://openmath.org/mailman/listinfo/om
