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Jean-Marie, You could easily provide a user interface element for 'sequence number' through the custom constraints code explained here: http://ferret.pmel.noaa.gov/LASdoc/serve/cache/53.htmlAll you need to do at the back end is figure out how to get the constraint information into your CDAT methods. Look for the following line in las/xml/perl/TMAP/insitu.pl for an example of accessing the information in custom constraints: my @constraints = $self->{req}->getConstraints;Don't hesitate to write if you get stuck at any point. What you want to do should be pretty straightforward. -- Jon J-M Epitalon wrote: Hello, I plan to use CDAT instead of Ferret as a graphic engine, because CDAT is not limited to 4 dimensions. Actually, I have model output organized along 4 dimensions plus one: we make 6 runs of a climate simulation with different initial conditions each time. I would like to have a dimension going from 1 to 6, the sequence number of a run. Would it be possible to modify LAS and its UI to support an additionnal dimension ? I guess it is not an easy task!! Could anyone give me some advice on where to start ? Jean-Marie |