# Event types

**Event types** are automatically created in your schema when you create an event trigger.

An **event trigger** is a special kind of flag that has a **Void** return type — it doesn't return a value, but can be called like any other flag, to log an event.

By default, new event types contain:

* A `context` field with the `Context` type, so they can capture the top-level `context` passed to the SDK.
* A `properties` field with an automatically created type, e.g. `PageViewEventProperties`. By default, the type is empty, but you can add event-specific properties here, e.g. `href`. You can then pass `properties` as an argument when calling the event trigger from your code.

This setup enables you to log events with both the top-level context you pass to the SDK and extra event-specific properties, with full end-to-end type safety based on your schema.

See the [analytics guide](https://docs.hypertune.com/analytics/guide) for more details on logging events.