"David Greene" <greened@obbligato.org> wrote in message news:44872145.6060806@obbligato.org...
Gerhard Wesp wrote:
On Tue, Jun 06, 2006 at 09:06:48PM -0400, David A. Greene wrote:
confusing to me. Why does mass default to kg rather than g? If these
Because kg is the SI unit for mass. It is a Good Thing that mass defaults to kg rather than g.
That doesn't answer my question.
Why?
I don't see why kg as the "SI unit for mass" requires all this prefix_offset stuff. You'd just use pqs::mass:kg, right?
grammes and milligrammes are common units too. The output of socalled coherent quatities is automated so that its not necessary to customise each units ouput. The prefix_offset is necessary to stick the correct prefix on, usually for mass, but also for anything that starts with mass, like 'mass_flow'. Yes its tricky to explain. Hopefully as a user you dont notice all that stuff. It just works!. Clever libary author has hidden it all away ;-) regards Andy Little