Namely, in the case of GDB-13, the uniformity (equal probability of sampling), completeness (sampling all molecules from GDB-13) and closedness (only molecules from GDB-13 are sampled) are to be assessed. To ease the evaluation of the models, three ratios representing the three properties were defined. Also, the 𝑈𝐶𝐶 = 𝑐𝑜𝑚𝑝𝑙𝑒𝑡𝑒𝑛𝑒𝑠𝑠 ⋅ 𝑢𝑛𝑖𝑓𝑜𝑟𝑚𝑖𝑡𝑦 ⋅ 𝑐𝑙𝑜𝑠𝑒𝑑𝑛𝑒𝑠𝑠 was also defined as a unified score that heavily penalizes models that have low scores.