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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Translating SI notation to SPICE
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Comments: In-reply-to Evan Foss <evanfoss AT gmail DOT com>
   message dated "Mon, 10 Dec 2012 20:03:47 -0500."
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Date: Tue, 11 Dec 2012 09:00:47 +0100 (CET)
From: karl AT aspodata DOT se (Karl Hammar)
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Evan Foss:
> For the over bar on things we have the \_ what if we declared \S to
> delineate the part of the attribute that is the scale? Alternatively
> we could go the mathcad route and put a multiplication sight between
> the scale and the units but I think that looks ugly.

Why not write it as an engineer/scientist would do it?
E.g. 10 Hz, 10Hz, 10 1/s, 15 A/V, 25 m/s2, 2e-4mmol, 3 km/ms, 3 V/As ...

It cannot be that hard to parse that, something like:

value : number dimension
dimension : tdimension | tdimension "/" tdimension
tdimension : "" | "1" | prefix unit | tdimension sep tdimension |
             tdimension exponent | "(" tdimension ")" exponent
sep : " " | "*"

Regards,
/Karl Hammar

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