Dataset {
    Sequence {
        Float64 time;
        Float32 longitude;
        Float32 latitude;
        Int32 _id;
        Sequence {
            Float32 salinity;
            Float32 depth;
            Float32 temperature;
        } profile;
        Structure {
            String title;
            String format_version;
            String Conventions;
            String file_source;
            String history;
            String LEXICON;
            String DEPH_qparm;
            String TEMP_qparm;
            String PSAL_qparm;
        } attributes;
        Structure {
            Structure {
                Float32 valid_range[2];
            } depth;
        } variable_attributes;
    } location;
    Structure {
        Float32 lon_range[2];
        Float32 lat_range[2];
        Float32 depth_range[2];
        Float64 time_range[2];
    } constrained_ranges;
} gtspp;