<!--
{
  "availability" : [
    "iOS: 26.0.0 -",
    "iPadOS: 26.0.0 -",
    "macCatalyst: 26.0.0 -",
    "macOS: 26.0.0 -",
    "visionOS: 26.0.0 -",
    "watchOS: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "FoundationModels",
  "identifier" : "/documentation/FoundationModels/GenerationSchema/init(type:description:properties:)",
  "metadataVersion" : "0.1.0",
  "role" : "Initializer",
  "symbol" : {
    "kind" : "Initializer",
    "modules" : [
      "Foundation Models",
      "FoundationModels"
    ],
    "preciseIdentifier" : "s:16FoundationModels16GenerationSchemaV4type11description10propertiesAcA9Generable_pXp_SSSgSayAC8PropertyVGtcfc"
  },
  "title" : "init(type:description:properties:)"
}
-->

# init(type:description:properties:)

Creates a schema by providing an array of properties.

```
init(type: any Generable.Type, description: String? = nil, properties: [GenerationSchema.Property])
```

## Parameters

`type`

The type this schema represents.

`description`

A natural language description of this schema.

`properties`

An array of properties.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)