.details                Single Entity Details
bundles                 HCA Bundle Querying
catalogs                Catalogs Available in the HCA
files                   HCA File Querying
filters                 HCA Filter Construction
hca_next                Page through HCA results
hca_next.tbl_hca        'tibble' reprsentation of HCA query results
lol                     Representing and manipulating list-of-list data
                        structures.
projects                HCA Project Querying
samples                 HCA Sample Querying
summary                 Repository summary statistics
