> ## 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.dimension

#### *property* Hierarchy.dimension *: [str](https://docs.python.org/3/library/stdtypes.html#str)*

Name of the dimension of the hierarchy.

A dimension is a logical group of attributes (e.g. Geography).
It can be thought of as a folder containing hierarchies.

<Note>
  If all the hierarchies in a dimension have their deepest level of type `TIME`, the dimension’s type will be set to `TIME` too.
  This can be useful for some clients such as Excel which rely on the dimension’s type to be `TIME` to decide whether to display date filters.
</Note>