{
  "source_dataset": "TAAC2026/data_sample_1000",
  "source_file": "demo_1000.parquet",
  "source_rows": 1000,
  "source_columns": 120,
  "converted_layout": "scalar event table plus per-family sequence tables",
  "time_mapping": {
    "scalar_table": "Time = timestamp * 1000 (epoch milliseconds)",
    "sequence_tables": "Time = sequence_index within each source interaction event"
  },
  "tag_columns": {
    "scalar_table": [
      "event_index",
      "user_id"
    ],
    "sequence_tables": [
      "event_index",
      "user_id",
      "item_id"
    ]
  },
  "scalar_table": {
    "table_name": "data_sample_1000_scalar",
    "rows": 1000,
    "parquet": "data_sample_1000_scalar.parquet",
    "tsfile": "data/data_sample_1000_scalar.tsfile"
  },
  "sequence_tables": {
    "user_int_lists": {
      "columns": [
        "user_int_feats_15",
        "user_int_feats_60",
        "user_int_feats_62",
        "user_int_feats_63",
        "user_int_feats_64",
        "user_int_feats_65",
        "user_int_feats_66",
        "user_int_feats_80",
        "user_int_feats_89",
        "user_int_feats_90",
        "user_int_feats_91"
      ],
      "rows": 11560,
      "parquet": "data_sample_1000_user_int_lists.parquet",
      "tsfile": "data/data_sample_1000_user_int_lists.tsfile"
    },
    "user_dense_lists": {
      "columns": [
        "user_dense_feats_61",
        "user_dense_feats_62",
        "user_dense_feats_63",
        "user_dense_feats_64",
        "user_dense_feats_65",
        "user_dense_feats_66",
        "user_dense_feats_87",
        "user_dense_feats_89",
        "user_dense_feats_90",
        "user_dense_feats_91"
      ],
      "rows": 318538,
      "parquet": "data_sample_1000_user_dense_lists.parquet",
      "tsfile": "data/data_sample_1000_user_dense_lists.tsfile"
    },
    "item_lists": {
      "columns": [
        "item_int_feats_11"
      ],
      "rows": 2086,
      "parquet": "data_sample_1000_item_lists.parquet",
      "tsfile": "data/data_sample_1000_item_lists.tsfile"
    },
    "domain_a_seq": {
      "columns": [
        "domain_a_seq_38",
        "domain_a_seq_39",
        "domain_a_seq_40",
        "domain_a_seq_41",
        "domain_a_seq_42",
        "domain_a_seq_43",
        "domain_a_seq_44",
        "domain_a_seq_45",
        "domain_a_seq_46"
      ],
      "rows": 701086,
      "parquet": "data_sample_1000_domain_a_seq.parquet",
      "tsfile": "data/data_sample_1000_domain_a_seq.tsfile"
    },
    "domain_b_seq": {
      "columns": [
        "domain_b_seq_67",
        "domain_b_seq_68",
        "domain_b_seq_69",
        "domain_b_seq_70",
        "domain_b_seq_71",
        "domain_b_seq_72",
        "domain_b_seq_73",
        "domain_b_seq_74",
        "domain_b_seq_75",
        "domain_b_seq_76",
        "domain_b_seq_77",
        "domain_b_seq_78",
        "domain_b_seq_79",
        "domain_b_seq_88"
      ],
      "rows": 570758,
      "parquet": "data_sample_1000_domain_b_seq.parquet",
      "tsfile": "data/data_sample_1000_domain_b_seq.tsfile"
    },
    "domain_c_seq": {
      "columns": [
        "domain_c_seq_27",
        "domain_c_seq_28",
        "domain_c_seq_29",
        "domain_c_seq_30",
        "domain_c_seq_31",
        "domain_c_seq_32",
        "domain_c_seq_33",
        "domain_c_seq_34",
        "domain_c_seq_35",
        "domain_c_seq_36",
        "domain_c_seq_37",
        "domain_c_seq_47"
      ],
      "rows": 449431,
      "parquet": "data_sample_1000_domain_c_seq.parquet",
      "tsfile": "data/data_sample_1000_domain_c_seq.tsfile"
    },
    "domain_d_seq": {
      "columns": [
        "domain_d_seq_17",
        "domain_d_seq_18",
        "domain_d_seq_19",
        "domain_d_seq_20",
        "domain_d_seq_21",
        "domain_d_seq_22",
        "domain_d_seq_23",
        "domain_d_seq_24",
        "domain_d_seq_25",
        "domain_d_seq_26"
      ],
      "rows": 1099859,
      "parquet": "data_sample_1000_domain_d_seq.parquet",
      "tsfiles": [
        "data/data_sample_1000_domain_d_seq_1.tsfile",
        "data/data_sample_1000_domain_d_seq_2.tsfile"
      ]
    }
  },
  "renamed_columns": {
    "timestamp": "event_timestamp"
  },
  "dropped_columns": []
}