# ActivityUnion Reference

#### Boolean

The `Boolean` scalar type represents `true` or `false`.

#### CountryCode

ISO 3166-1 alpha-2 country code

#### Float

The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point).

#### FuzzyDateInt

8 digit long date integer (YYYYMMDD). Unknown dates represented by 0. E.g. 2016: 20160000, May 1976: 19760500

#### ID

The `ID` scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as `"4"`) or integer (such as `4`) input value will be accepted as an ID.

#### Int

The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.

#### Json

#### String

The `String` scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.

#### ActivityUnion

Activity union type

| Type                                                                                                                        | Description                                |
| --------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------ |
| [**TextActivity**](https://github.com/AniList/ApiV2-GraphQL-Docs/blob/master/reference/object/textactivity/README.md)       | User text activity                         |
| [**ListActivity**](https://github.com/AniList/ApiV2-GraphQL-Docs/blob/master/reference/object/listactivity/README.md)       | User list activity (anime & manga updates) |
| [**MessageActivity**](https://github.com/AniList/ApiV2-GraphQL-Docs/blob/master/reference/object/messageactivity/README.md) | User message activity                      |