{
  "schema_name": "round_index_parquet",
  "schema_version": 6,
  "artifact": "round_index.parquet",
  "format": "parquet",
  "row_grain": "one released 10-POV round",
  "description": "Round-level grouping for synchronized multi-POV selection and round-shuffled training. Physical sample lookup lives in sample_index.parquet.",
  "window_definitions": {
    "alive_intersection": "Time interval where every released POV player in the round is alive simultaneously. Researchers can use this for all-players-alive synchronized windows.",
    "clip_intersection": "Time interval where every released POV clip in the round has video frames available.",
    "clip_union": "Time interval where at least one released POV clip in the round has video frames available.",
    "round_lifecycle": "Canonical game round window from round_start_tick to round_stop_tick."
  },
  "primary_key": [
    "round_id"
  ],
  "columns": [
    {"name": "match_id", "arrow_type": "string", "nullable": false},
    {"name": "round_id", "arrow_type": "string", "nullable": false},
    {"name": "round_idx", "arrow_type": "int32", "nullable": false},
    {"name": "split", "arrow_type": "string", "nullable": false, "valid_values": ["train", "val", "test"]},
    {"name": "map_slug", "arrow_type": "string", "nullable": false, "valid_values": ["anubis", "ancient", "dust2", "inferno", "mirage", "nuke", "overpass"]},
    {"name": "round_start_tick", "arrow_type": "int64", "nullable": false},
    {"name": "round_decision_tick", "arrow_type": "int64", "nullable": false},
    {"name": "round_stop_tick", "arrow_type": "int64", "nullable": false},
    {"name": "t_score_start", "arrow_type": "int32", "nullable": false, "description": "T-side score before this round's outcome is applied."},
    {"name": "ct_score_start", "arrow_type": "int32", "nullable": false, "description": "CT-side score before this round's outcome is applied."},
    {"name": "round_winner", "arrow_type": "string", "nullable": false, "valid_values": ["T", "CT", ""], "description": "Team side that won the round, from round_end.winner."},
    {"name": "round_end_reason", "arrow_type": "string", "nullable": false, "description": "Sanitized round_end.reason value when available."},
    {"name": "round_duration_s", "arrow_type": "float32", "nullable": false},
    {"name": "half_idx", "arrow_type": "int32", "nullable": false},
    {"name": "is_pistol_round", "arrow_type": "bool", "nullable": false},
    {"name": "score_diff_start", "arrow_type": "int32", "nullable": false},
    {"name": "pov_count", "arrow_type": "int32", "nullable": false},
    {"name": "complete_10_pov", "arrow_type": "bool", "nullable": false},
    {"name": "alive_intersection_start_tick", "arrow_type": "int64", "nullable": false, "description": "Maximum alive_start_tick across POVs in the round."},
    {"name": "alive_intersection_end_tick", "arrow_type": "int64", "nullable": false, "description": "Minimum alive_end_tick across POVs in the round."},
    {"name": "alive_intersection_frames", "arrow_type": "int32", "nullable": false, "description": "Frame count for the interval where all released POV players are alive simultaneously."},
    {"name": "clip_intersection_start_tick", "arrow_type": "int64", "nullable": false, "description": "Maximum clip_start_tick across POVs in the round."},
    {"name": "clip_intersection_end_tick", "arrow_type": "int64", "nullable": false, "description": "Minimum clip_end_tick across POVs in the round."},
    {"name": "clip_intersection_frames", "arrow_type": "int32", "nullable": false, "description": "Frame count for the interval common to all released POV clips."},
    {"name": "clip_union_start_tick", "arrow_type": "int64", "nullable": false, "description": "Minimum clip_start_tick across POVs in the round."},
    {"name": "clip_union_end_tick", "arrow_type": "int64", "nullable": false, "description": "Maximum clip_end_tick across POVs in the round."},
    {"name": "media_truncated_any_pov", "arrow_type": "bool", "nullable": true, "description": "True when at least one POV sidecar was clipped to shorter rendered media than the corrected round/death-tail window."},
    {"name": "media_truncated_pov_count", "arrow_type": "int32", "nullable": true, "description": "Number of POVs in the round with media_truncated=true."},
    {"name": "bomb_planted", "arrow_type": "bool", "nullable": false},
    {"name": "bomb_defused", "arrow_type": "bool", "nullable": false},
    {"name": "bomb_exploded", "arrow_type": "bool", "nullable": false},
    {"name": "round_kills_total", "arrow_type": "int32", "nullable": false},
    {"name": "round_headshots_total", "arrow_type": "int32", "nullable": false},
    {"name": "has_awp_any_pov", "arrow_type": "bool", "nullable": false}
  ],
  "validation": [
    "primary key is unique",
    "pov_count == 10",
    "complete_10_pov is true",
    "round_start_tick <= round_decision_tick <= round_stop_tick",
    "alive_intersection_start_tick <= alive_intersection_end_tick",
    "clip_intersection_start_tick <= clip_intersection_end_tick",
    "clip_union_start_tick <= clip_intersection_start_tick",
    "clip_intersection_start_tick <= alive_intersection_start_tick",
    "alive_intersection_end_tick <= clip_intersection_end_tick",
    "clip_intersection_end_tick <= clip_union_end_tick",
    "t_score_start and ct_score_start are cumulative side scores before the current round",
    "round_winner is T, CT, or empty",
    "round event booleans and kill/headshot counts are aggregated from the ten POV sample event summaries",
    "no resolution, shard path, offset, or per-member columns are present"
  ]
}