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Posts: 469
Registered: October 2003
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Re: units in sbml l2v3
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04 Jun '07 14:42

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> Sven, here is the misunderstanding. In the old way, you do not have the
> first exponent. Your example is too simple. Let's take another one, more
> explicit (I hope): a density of molecule expressed in micromole per square
> inches:
>
> <listOfUnitDefinitions>
> <unitDefinition id="umolPerSqIn">
> <listOfUnits>
> <unit kind="mole" scale="-6" />
> <unit kind="metre" multiplier="0.254" exponent="2" />
> </listOfUnits>
> </unitDefinition>
> </listOfUnitDefinitions>
OK, wrong one. Here it is again (actually this is even better than I
thought):
<listOfUnitDefinitions>
<unitDefinition id="umolPerSqIn">
<listOfUnits>
<unit kind="mole" scale="-6" />
<unit kind="metre" multiplier="0.254" exponent="-2" />
</listOfUnits>
</unitDefinition>
</listOfUnitDefinitions>
old way:
mole x 10E-6 x 0.254 x (metre)^(-2)
new way:
mole x 10E-6 x (0.254 x metre)^(-2)
The first one is wrong. The second is right.
--
Nicolas LE NOVERE, Computational Neurobiology,
EMBL-EBI, Wellcome-Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK
Tel: +44(0)1223494521, Fax: +44(0)1223494468, Mob: +44(0)7833147074
http://www.ebi.ac.uk/~lenov, AIM:nlenovere, MSN:nlenovere@hotmail.com
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