> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# atoti.Hierarchy

### *final class* atoti.Hierarchy

Hierarchy of a [`Cube`](./atoti.cube#atoti.Cube).

A hierarchy is a sub category of a [`dimension`](./atoti.Hierarchy.dimension#atoti.Hierarchy.dimension) and represents a precise type of data.

For example, Quarter or Week could be hierarchies in the Time dimension.

<Callout icon="link">
  **See also**:
  [`Hierarchies`](./atoti.hierarchies#atoti.hierarchies.Hierarchies) to define one.
</Callout>

| [`description`](./atoti.Hierarchy.description#atoti.Hierarchy.description)                   | Description of the hierarchy.                                                                                                                                                             |
| -------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`dimension`](./atoti.Hierarchy.dimension#atoti.Hierarchy.dimension)                         | Name of the dimension of the hierarchy.                                                                                                                                                   |
| [`dimension_default`](./atoti.Hierarchy.dimension_default#atoti.Hierarchy.dimension_default) | Whether the hierarchy is the default in its [`dimension`](./atoti.Hierarchy.dimension#atoti.Hierarchy.dimension) or not.                                                                  |
| [`folder`](./atoti.Hierarchy.folder#atoti.Hierarchy.folder)                                  | The hierarchy folder.                                                                                                                                                                     |
| [`isin`](./atoti.Hierarchy.isin#atoti.Hierarchy.isin)                                        | Return a condition evaluating to `True` where this hierarchy's current member (or its path) is included in the given *members* (or *member\_paths*), and evaluating to `False` elsewhere. |
| [`name`](./atoti.Hierarchy.name#atoti.Hierarchy.name)                                        | Name of the hierarchy.                                                                                                                                                                    |
| [`slicing`](./atoti.Hierarchy.slicing#atoti.Hierarchy.slicing)                               | Whether the hierarchy is slicing or not.                                                                                                                                                  |
| [`viewers`](./atoti.Hierarchy.viewers#atoti.Hierarchy.viewers)                               | [`visible`](./atoti.Hierarchy.visible#atoti.Hierarchy.visible) is True if and only if at least one of the roles of the current user is included in this set.                              |
| [`virtual`](./atoti.Hierarchy.virtual#atoti.Hierarchy.virtual)                               | Whether the hierarchy is virtual or not.                                                                                                                                                  |
| [`visible`](./atoti.Hierarchy.visible#atoti.Hierarchy.visible)                               | Whether the hierarchy should be displayed to the user in Atoti UI (or other compatible clients).                                                                                          |