Enum Type Definition

Input Object Type Definition

Interface Type Definition

Object Type Definition

Scalar Type Definition

Union Type Definition

These types may describe the parent context of a selection set.

These types may describe the parent context of a selection set.

These types may be used as input types for arguments and directives.

These types may describe types which may be leaf values.

These named types do not include modifiers like List or NonNull.

These types can all accept null as a value.

These types may be used as output types as the result of fields.

These are all of the possible kinds of types.

Used while defining GraphQL types to allow for circular references in otherwise immutable type definitions.