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# App schema base types

Types that provide the underlying functionality for app schemas.

## Topics

### Schema types

[`struct AppSchema`](/documentation/AppIntents/AppSchema)

[`protocol AppSchemaEnum`](/documentation/AppIntents/AppSchemaEnum)

[`protocol AppSchemaEntity`](/documentation/AppIntents/AppSchemaEntity)

[`protocol AppSchemaIntent`](/documentation/AppIntents/AppSchemaIntent)

### Previous schema types

[`protocol AssistantEnum`](/documentation/AppIntents/AssistantEnum)

A value that Apple Intelligence and Siri use to fulfill a person’s request.

[`protocol AssistantEntity`](/documentation/AppIntents/AssistantEntity)

An app entity that Apple Intelligence can discover to fulfill a person’s request.

[`protocol AssistantIntent`](/documentation/AppIntents/AssistantIntent)

An app intent that Siri performs to fulfill a person’s request.

[`protocol AssistantSchemaEnum`](/documentation/AppIntents/AssistantSchemaEnum)

[`protocol AssistantSchemaEntity`](/documentation/AppIntents/AssistantSchemaEntity)

[`protocol AssistantSchemaIntent`](/documentation/AppIntents/AssistantSchemaIntent)

[`struct AssistantSchema`](/documentation/AppIntents/AssistantSchema)

[`enum AssistantSchemas`](/documentation/AppIntents/AssistantSchemas)


---

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