{"text_format":"dbase-jsonl-2026-09-30","columns":[{"name":"HYDRGRP","type":"character","width":5}],"n_rows":7,"rows_kept":7,"cut":false,"deleted_skipped":0,"read_ended":"whole","bounds":"16MiB/16384/4096/first_that_fit","version":"dbase_level_three","encoding_class":"enc_absent","reader":"statdb_count/16"}
[null]
["A"]
["A/D"]
["B"]
["B/D"]
["C/D"]
["D"]