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Hello Ralph,

On Thu, 22 Dec 2005 11:57:32 +0100
Ralph Gauges <ralph.gauges@eml-r.villa-bosch.de> wrote:

> The question is, do we consider an empty math field to be a formula or
> do we consider it to mean that there is no formula specified.
> Alternatively, we could think about making the formula attribute
> optional in Level 2 Version 2, so if no formula attribute was given
> and no sboTerm was given, this would be the same as if there was no
> kineticLaw, if both are given, the formula is what counts.
>
> R.

We must be very carefully here. The sboTerm is optional meaning the
MathML is still authoritative. The question remains what number or
function does an empty math element mean. I would interpret it as not a
number (NaN). If the sboTerm contradicts this, we again have to inform
the user about the problem. It may be good to have an sboTerm for an
undefined/unknown kinetic law which evaluates to NaN.

Thanks,
Stefan

--
Stefan Hoops, Ph.D.
Senior Project Associate
Virginia Bioinformatics Institute - 0477
Virginia Tech
Bioinformatics Facility I
Blacksburg, Va 24061, USA

Phone: (540) 231-1799
Fax: (540) 231-2606
Email: shoops@vbi.vt.edu