# HydrodynamicEventBase

> **HydrodynamicEventBase** = `object`

## Properties

### attachments?

> `optional` **attachments?**: [`Attachment`](/core/api/type-aliases/Attachment)[]

Field sheets, logger exports. Since v2.3.

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### corrects?

> `optional` **corrects?**: `string`

`hydrodynamic_events[].id` of the event this one retracts. Since v2.3.
A retracted event stays in the file but is excluded from every derivation.

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### datetime

> **datetime**: `string`

RFC 3339 datetime with mandatory UTC offset.

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### equipment?

> `optional` **equipment?**: `string`

Equipment description.

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### id

> **id**: `string`

Unique within `hydrodynamic_events`. UUID v4 recommended.

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### notes?

> `optional` **notes?**: `string`

Free-text observations.

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### operator?

> `optional` **operator?**: `string`

Person or company conducting the measurement or test.

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### sequence?

> `optional` **sequence?**: `number`

Tiebreaker for events sharing the same instant.

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### type

> **type**: `string`

Event type.