Hi Andrew,

This is looking good and will be a very useful companion to the 
simulation specification in terms of model curation.

Just a couple of comments.

I would like to be able to specify a graph that has two different y-axes 
- i.e., it is pretty common to draw a graph that has the gating kinetics 
(non-dimensional variables ranging from 0->1) or ionic concentrations 
and channel currents on the same graph (vs time). The current 
specification states that in this case all variables will be drawn on 
the same set of axes with a common scale which can be arbitrarily 
defined by the application.

It would also be nice to define the axes independently of the variables. 
If, for example, you are using this specification to define a certain 
plot to draw to match a graph given in a paper (or preferably to be 
using this specification to define the graph used in a paper), then the 
ability to define a fixed range of x and y is required. The fixed range 
may be either a superset or subset of the full range of the given variables.

Also, the use of <cs:simulation rdf:nodeID="..."/> to reference the 
simulation which defines the variables for use in a trace seems a bit 
wrong to me. Seems something more like the <cg:variable 
rdf:resource="..."/> would be more appropriate. Does the <cs:simulation> 
element in this instance meet requirements for such an element defined 
in the simulation metadata specification - or is such validation not 
required? Even if its valid, I just don't like it :-)

Finally, just a quick question: can <cg:type 
rdf:resource="http://www.cellml.org/metadata/graphs/1.0#scatter"/> be 
replaced with <cg:type rdf:resource="cg:scatter"/> or something, or is 
the full URI required?

Andre.

Andrew Miller wrote:
> Hi all,
> 
> I have produced a draft specification for graph metadata (that is, 
> meta-data describing how to create graphs from CellML simulations. This 
> could be used, for example, to allow CellML software to reproduce the 
> graphs from a paper).
> 
> The specification is available at 
> http://www.cellml.org/specifications/metadata/graphs/. Any comments on 
> this draft would be appreciated (please send comments to 
> [email protected]).
> 
> Best regards,
> Andrew Miller
> 
> _______________________________________________
> cellml-discussion mailing list
> [email protected]
> http://www.cellml.org/mailman/listinfo/cellml-discussion

-- 
David Nickerson, PhD
Research Fellow
Division of Bioengineering
Faculty of Engineering
National University of Singapore
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