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[cellml-discussion] Include_in_CellML_1.2 requested: [Tracker Item 153] Allow multiple connections between the same pair of components


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  • From: ak.miller at auckland.ac.nz (Andrew Miller)
  • Subject: [cellml-discussion] Include_in_CellML_1.2 requested: [Tracker Item 153] Allow multiple connections between the same pair of components
  • Date: Wed, 29 Aug 2007 12:12:40 +1200
Hi all,

Are there any objections to marking this as something we should include
in CellML 1.2?

Best regards,
Andrew

cellml-tracker at cellml.org wrote:
> Andrew Miller <ak.miller at auckland.ac.nz> has asked for
> Include_in_CellML_1.2:
> Tracker Item 153: Allow multiple connections between the same pair of
> components
> http://bowmore.elyt.com/bugzilla/show_bug.cgi?id=153
>
> ------- Additional Comments from Andrew Miller <ak.miller at auckland.ac.nz>
> Section 3.2.4 of CellML 1.1 states, in the second sentence of the second
> paragraph: "Only one connection may be created between any given pair of
> components in a model".
>
> This is a fairly pointless restriction from all fronts:
> * From a model authors perspective, it creates a burden on the author to
> consolidate all their connections which may have been created for different
> purposes, and current model authors claim that such consolidation is time
> consuming and error prone.
> * From a model readability perspective, it is also burdensome because
> connections between variables may not be in a logical order (this is less
> of an
> issue if tools are used, but the point still holds).
> * Implementation experience suggests that it is no harder to allow
> multiple
> connections between the same pair of components when writing simulation
> software, but the extra constraint imposes more work on developers when
> writing
> tools which try to validate the model.
>
> To fix this, we could simply drop the first two sentences of the second
> paragraph of Section 3.2.4, and perhaps replace them with a short
> explanation.
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