function AddNonNegRatScalar(name, value, unit, desc, relPred, valPred)
%% Add positive rational scalar
if nargin < 5
relPred = 'true';
end
valPred_ = [name, ' >= 0'];
if nargin == 6
valPred_ = [valPred_, ' && ', valPred];
end
AddRatScalar(name, value, unit, desc, relPred, valPred_);
end