We report on statistics, and perform the consistency check described before, comparing the computed and measured pore volumes. We discuss the different reasons that lead to mismatches, and provide a reference set of isotherms with linked crystal structure deemed suitable for comparison with molecular simulations. The reader can inspect all the steps performed within this pipeline, by browsing the Jupyter Notebooks provided in the GitHub repository . The NIST-ISODB was initially conceived as a list of publications on novel adsorbents with minimal metadata. Of the 4128 indexed publications, ≈ 80 % are associated with digitized isotherms, mostly obtained from measurements, but also from fitting to experimental data or from molecular simulations. The collection of metadata on the method used to obtain isotherms started only at a later stage, first at the level of the publication and then at the level of individual isotherms. We include only isotherms that are marked themselves as "experimental" or that are contained in a reference that is marked to contain exclusively experimental isotherms. After excluding isotherms coming from simulations or models and isotherms of unknown origin (unspecified, or the reference paper is denoted to contain both), we end up with 21 375 experimental isotherms (60 % of the total 35 482).