unconditional probability distribution non-parametric distribution Thomas Nichols Camille Maumet Initially discussed at https://github.com/incf-nidash/nidm/pull/191 http://purl.obolibrary.org/obo/stato.owl Philippe Rocca-Serra Karl Helmer Probability distribution estimated empirically on the data without assumptions on the shape of the probability distribution. NonparametricProbabilityDistribution metadata incomplete