Types

Types are value storage and access mechanism for resource, data source, or provider schema data. Every attribute and block has an associated type, which describes the kind of data. These types fully support Terraform's type system concepts that cannot be represented in Go built-in types, such as *string. Framework types can be extended by implementing custom types in provider code or shared libraries to provide specific use case functionality.

Available Types

The framework type system supports the following types:

Primitive: Type that contains a single value, such as a boolean, number, or string.
Collection: Type that contains multiple values of a single element type, such as a list, map, or set.
Object: Type that defines a mapping of explicit attribute names to value types.
Tuple: Type that defines an ordered collection of elements where each element has it's own type.
Dynamic: Container type that can contain any underlying value type.

Primitive Types

Types that contain a single data value, such as a boolean, number, or string. These are directly associated with their primitive attribute type.

Type	Use Case
Bool	Boolean true or false
Float32	32-bit floating point number
Float64	64-bit floating point number
Int32	32-bit integer number
Int64	64-bit integer number
Number	Arbitrary precision (generally over 64-bit, up to 512-bit) number
String	Collection of UTF-8 encoded characters

Collection Types

Types that contain multiple values of a single element type, such as a list, map, or set.

These types are associated with:

Collection attribute types
Collection-based nested attribute type (list, map, and set of object type)
Collection-based nested block type (list and set of object type)

Type	Use Case
List	Ordered collection of single element type
Map	Mapping of arbitrary string keys to values of single element type
Set	Unordered, unique collection of single element type

Object Type

Type that defines a mapping of explicit attribute names to value types.

This type is associated with:

Single nested attibute type
Single nested block type
Nested object within collection-based nested attribute type (list, map, and set of object type)
Nested object within collection-based nested block type (list and set of object type)
Object attribute type

Type	Use Case
Object	Mapping of explicit attribute names to values

Tuple Type

Type that defines an ordered collection of elements where each element has it's own type.

Note

This type intentionally includes less functionality than other types in the type system as it has limited real world application and therefore is not exposed to provider developers except when working with dynamic values.

Type	Use Case
Tuple	Ordered collection of multiple element types

Dynamic Type

Container type that can contain any underlying value type, determined by Terraform or the provider at runtime.

Type	Use Case
Dynamic	Any value type of data, determined at runtime.