Which kind of number the stored feature importance is; null for models trained before it was recorded.
The majority-baseline rule in force when the model was trained (D2-C5d).
The pipeline's declared time index (ValidationStrategy.TimeIndexColumn), or null.
True when Metrics were measured on rows the fitted model did not train on (every strategy that writes this record).
Why the trust verdict is withheld, or null when it is not.
How a model's stored numbers were measured; training writes it into
MLModel.Lineageunderevaluation.