# Data Dictionary - Australian Power Grid (AEMO NEM) - regional spot price & demand, cleaned Parquet

**Units:** vary by `metric` - read the per-row `unit` column (overall: mixed (AUD/MWh · MW)).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | NEM region (NSW1, QLD1, VIC1, SA1, TAS1) |
| `ts` | timestamp (UTC) | Interval-ending timestamp |
| `metric` | str | Spot price / Operational demand |
| `value` | float | AUD/MWh (price) or MW (demand) |
| `unit` | str | Unit |
| `res_min` | int | Interval length (5 or 30 minutes) |

*Source: Australian Energy Market Operator (AEMO) - used with attribution; AEMO does not endorse this product.*