On 25 November 2011, Hans Hagen [pragma@wxs.nl] wrote:

> I uploaded a new beta.
> ...

> - Hz, dB (actually deci + bel so megabel also works), lx, permille, t,
> k, Da added

Actually decibel is an odd one, a logarithmic unit, so prefixes other than
"deci" are never used. However the implementation is no problem.

> - ad 2: no looking back (would demand an extra correction pass
> elsewhere, maybe some day)

Here I meant just space within the argument to \unit{}. It seems to be
handled correctly now ...

> - ad 8: manipulating the input this way is somewhat beyond the purpose
> of a typesetting system

(Normalisation of numbers and unit prefixes). OK, just seeing where the line
was to be drawn. However, in the code a comment notes the possibility of
automatic conversions to imperial units, which is a step even further, actually.
Personally I don't think it's a good idea. [Or the b-grade movies].

> - ad 9: much will be configureable; see mkiv file for an example of
> defining extra units (\registerunit [units] [point=pt, basepoint=bp]);

Works, although 

> - I myself am not going to look in all kind of other tex stuff that lays
> around as it's up to users/usage what is added, given that it fits into
> the model of context; we have the old units modules as starting point

That was a note to self, but any takers ...

I attach a (much shorter) bunch of test cases (source and pdf again).

Thanks,

Robin