To evaluate the clustering results, multiple metrics were assessed. First, the clustering results were compared to manually annotated labels for a subset of the data. To quantify the similarity between annotated labels and generated clusters, we used both the homogeneity, i.e. the label agreement of records within the same cluster, and the completeness, i.e. the extent to which all occurrences of a particular experiment are assigned to the same cluster. Second, the similarity of records in the same cluster was assessed based on the normalized purity of the properties assay type, BAO format and standard type. For this purpose the normalized purity was calculated as follows: