# Duration

> [DataType](https://schema.org.ai/DataType) > [Quantity](https://schema.org.ai/Quantity) > [Duration](https://schema.org.ai/Duration)

Quantity: Duration (use [ISO 8601 duration format](http://en.wikipedia.org/wiki/ISO_8601)).

**Extends:** [Quantity](https://schema.org.ai/Quantity)

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Quoted from Schema.org 30.1, https://schema.org/Duration, under CC BY-SA 3.0. Served by the Org.AI Foundation at https://schema.org.ai/Duration.