{
    "sample_size": {
        "total": 493306303,
        "train": 394647318,
        "valid": 50079027,
        "test": 48579958
    },
    "oov_filter": {
        "min_feat_count": 2,
        "applied_to": [
            "video_category",
            "watching_times",
            "gender",
            "age"
        ],
        "rule": "特征值出现次数 < min_feat_count 的统一映射为 0 (unknown/padding)"
    },
    "blocked_layout": {
        "n_user_parts": 32,
        "train_blocks": 32,
        "valid_blocks": 8,
        "test_blocks": 8,
        "train": {
            "data_dir": "train/data",
            "user_info_dir": "train/user_info",
            "item_info_dir": "train/item_info"
        },
        "valid": {
            "data_dir": "valid/data",
            "user_info_dir": "valid/user_info",
            "item_info_dir": "valid/item_info"
        },
        "test": {
            "data_dir": "test/data",
            "user_info_dir": "test/user_info",
            "item_info_dir": "test/item_info"
        },
        "block_pair_rule": "同一 split 下, data/user_info/item_info 使用相同的 part-xxxxx 编号配对读取。",
        "local_index_rule": {
            "user_index": "block-local dense index, starts from 0",
            "item_index": "block-local dense index, 0 reserved for padding",
            "user_id": "global feature id, consistent across blocks",
            "item_id": "global feature id, consistent across blocks"
        }
    },
    "vocab_size": {
        "user_index": 4996176,
        "item_index": 3753437,
        "user_id": 4996177,
        "item_id": 3753437,
        "video_category": 5,
        "watching_times": 419,
        "gender": 5,
        "age": 10,
        "action": 17
    },
    "label": [
        "click",
        "follow",
        "like",
        "share"
    ],
    "action_vocab": {
        "click": 1,
        "exposure": 2,
        "click|like": 3,
        "follow|like": 4,
        "like": 5,
        "click|follow|like": 6,
        "click|follow": 7,
        "like|share": 8,
        "click|share": 9,
        "share": 10,
        "follow|share": 11,
        "click|like|share": 12,
        "follow": 13,
        "click|follow|like|share": 14,
        "click|follow|share": 15,
        "follow|like|share": 16
    },
    "action_vocab_desc": "编码后的 action 词表，用于 dataloader 基于 full_action_seq 构造 task-specific token masks。",
    "user_info_schema": {
        "fields": [
            "user_index",
            "full_item_seq",
            "full_action_seq"
        ],
        "desc": "这里的 user_index / full_item_seq 中的 item index 都是 block-local index；full_action_seq 为全局时间顺序序列。"
    },
    "item_info_schema": {
        "fields": [
            "item_index",
            "item_id",
            "video_category"
        ],
        "desc": "item_index 为 block-local index；item_id 为全局 item feature id，用于 embedding 一致性。"
    },
    "max_len": {
        "full_item_seq": 6013,
        "full_action_seq": 6013
    }
}