# 0.4.1 (2020-06-17)¶

• New tutorial exploring the main basic features of atoti.

• rank() returns a measure ranking the members of a given hierarchy based on the value of another measure.

• array.prefix_sum() performs the prefix sum of array measures.

• Hierarchies can have the same name if they are in different dimensions. To avoid conflicts, a hierarchy can be accessed via a tuple containing the dimension and the hierarchy: cube.hierarchies["Product", "Size"].

## Changed¶

• Bumped the minimal required version of JupyterLab to 2.1.

• Upgraded from ActiveUI SDK 4.3.7 to 4.3.8.

• Better messages for Java known errors (#43).

• The Auth0 support in Atoti+ has been replaced by the more general OpenID Connect authentication protocol. The structure of the configuration can be seen in config.create_oidc_authentication().