# MLDataValue.DictionaryType A dictionary of named data values. ``` struct DictionaryType ``` ## Topics ### Creating a dictionary type [`init([MLDataValue : MLDataValue])`](/documentation/CreateML/MLDataValue/DictionaryType/init(_:)) [`init(uniqueKeysWithValues: S)`](/documentation/CreateML/MLDataValue/DictionaryType/init(uniqueKeysWithValues:)) [`typealias Key`](/documentation/CreateML/MLDataValue/DictionaryType/Key) [`typealias Value`](/documentation/CreateML/MLDataValue/DictionaryType/Value) ### Getting an element [`subscript(MLDataValue.DictionaryType.Key) -> MLDataValue.DictionaryType.Value?`](/documentation/CreateML/MLDataValue/DictionaryType/subscript(_:)) ### Default Implementations [MLDataValueConvertible Implementations](/documentation/CreateML/MLDataValue/DictionaryType/MLDataValueConvertible-Implementations) ## Relationships ### Conforms To [`Escapable`](/documentation/Swift/Escapable) [`Collection`](/documentation/Swift/Collection) [`Copyable`](/documentation/Swift/Copyable) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) [`Equatable`](/documentation/Swift/Equatable) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`MLDataValueConvertible`](/documentation/CreateML/MLDataValueConvertible) [`Sequence`](/documentation/Swift/Sequence) --- Copyright © 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)