label
    -> posterior_samples            Dataset
    -> config_file                  Group
        -> [section]                Group
            -> key                  Dataset
    -> priors                       Group
        -> samples                  Dataset
    -> injection_data               Dataset
    -> meta_data                    Group
        -> meta_data                Group
            ->                      Dataset
        -> sampler                  Group
            ->                      Dataset
    -> version                      Dataset

label2                              Group
    -> posterior_samples            Dataset
    -> config_file                  Group
        -> [section]                Group
            -> key                  Dataset
    -> priors                       Group
        -> samples                  Dataset
    -> injection_data               Dataset
    -> meta_data                    Group
        -> meta_data                Group
            ->                      Dataset
        -> sampler                  Group
            ->                      Dataset
    -> version                      Dataset

...

version                             Group
    -> environment                  Dataset
    -> packages                     Dataset
    -> pesummary                    Dataset

history
    -> gps_creation_time            Dataset
    -> creator                      Dataset
    ->                              Dataset
