# Data Dictionary - European Gas Storage - daily by country (AGSI+), cleaned Parquet

**Units:** vary by `metric` - read the per-row `unit` column (overall: TWh / % / GWh/d).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Country code or EU aggregate |
| `ts` | timestamp (UTC) | Gas day |
| `metric` | str | Gas in storage (TWh) / Fullness (%) / Injection / Withdrawal |
| `value` | float | Metric value |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (daily = 1440) |

*Source: Gas Infrastructure Europe (GIE) - AGSI+ / ALSI.*