Add dataset card with schema docs, subset configs, and license

README.md

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+---
+license: mit
+task_categories:
+  - time-series-forecasting
+  - tabular-classification
+tags:
+  - polymarket
+  - prediction-markets
+  - culture
+  - elon-musk
+  - twitter
+  - social-media
+  - finance
+language:
+  - en
+pretty_name: Polymarket Culture Markets
+size_categories:
+  - 1M<n<10M
+configs:
+  - config_name: markets
+    data_files:
+      - split: train
+        path: data/markets.parquet
+  - config_name: prices
+    data_files:
+      - split: train
+        path: data/prices/**/*.parquet
+  - config_name: ticks
+    data_files:
+      - split: train
+        path: data/ticks/**/*.parquet
+---
+
+# Polymarket Culture Markets
+
+Multi-outcome prediction market data from Polymarket for cultural events. Currently covers **Elon Musk tweet count** markets across 4-day, 7-day, and 1-month timeframes.
+
+Updated automatically every 3 hours.
+
+## Subsets
+
+```python
+from datasets import load_dataset
+
+markets = load_dataset("aliplayer1/polymarket-culture-data", "markets")
+prices = load_dataset("aliplayer1/polymarket-culture-data", "prices")
+ticks = load_dataset("aliplayer1/polymarket-culture-data", "ticks")
+```
+
+Or query with DuckDB:
+
+```python
+import duckdb
+
+duckdb.sql("""
+    SELECT * FROM 'hf://datasets/aliplayer1/polymarket-culture-data/data/prices/**/*.parquet'
+    WHERE crypto = 'ELON-TWEETS'
+    LIMIT 100
+""").show()
+```
+
+## Data Description
+
+### `markets` — Market metadata
+
+One row per market with question text, resolution, timeframe, and a JSON `tokens` map of token IDs to outcome labels.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `market_id` | string | Polymarket market identifier |
+| `question` | string | Market question text |
+| `crypto` | string | Event category (e.g. "ELON-TWEETS") |
+| `timeframe` | string | Market timeframe (4-day, 7-day, 1-month) |
+| `volume` | float32 | Market volume in USDC |
+| `resolution` | int8 | Market resolution |
+| `start_ts` | int64 | Market start timestamp (epoch seconds) |
+| `end_ts` | int64 | Market end timestamp (epoch seconds) |
+| `condition_id` | string | On-chain condition identifier |
+| `tokens` | string | JSON map of token ID to outcome label |
+
+### `prices` — Long-format price history
+
+Price time series in long format (one row per token per timestamp), unlike the binary crypto dataset which uses wide format (up_price/down_price columns). Hive-partitioned by `crypto` and `timeframe`.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `market_id` | string | Polymarket market identifier |
+| `timestamp` | int64 | Price timestamp (epoch seconds) |
+| `token_id` | string | CLOB token identifier |
+| `outcome` | string | Outcome label (e.g. "10-19", "20-29", "Yes") |
+| `price` | float32 | Outcome price (0.0-1.0) |
+| `crypto` | string | Event category |
+| `timeframe` | string | Market timeframe |
+
+### `ticks` — Trade-level fills
+
+Individual trades from on-chain events and WebSocket captures. Same schema as the crypto dataset's ticks table, Hive-partitioned by `crypto` and `timeframe`.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `market_id` | string | Polymarket market identifier |
+| `timestamp_ms` | int64 | Trade timestamp (epoch milliseconds) |
+| `token_id` | string | CLOB token identifier |
+| `outcome` | string | Outcome label |
+| `side` | string | "BUY" or "SELL" (taker perspective) |
+| `price` | float32 | Trade price (0.0-1.0) |
+| `size_usdc` | float32 | Trade size in USDC |
+| `tx_hash` | string | Transaction hash ("" for WS ticks) |
+| `block_number` | int32 | Polygon block number (0 for WS ticks) |
+| `log_index` | int32 | Log index within block |
+| `source` | string | "onchain" or "websocket" |
+| `spot_price_usdt` | float32 | Not applicable for culture markets |
+| `spot_price_ts_ms` | int64 | Not applicable for culture markets |
+
+## Pipeline
+
+This dataset is produced by [polymarket-data-pipeline](https://github.com/aliplayer1/polymarket-data-pipeline). See the crypto dataset ([polymarket-crypto-updown](https://huggingface.co/datasets/aliplayer1/polymarket-crypto-updown)) for full pipeline documentation.
+
+## License
+
+MIT