Expression versioning allows you to save modifications to existing expressions as their subsequent versions. This way, you can track the changes made to expressions and return to previous versions when needed. Changes to expressions can be saved in a draft mode as well.

Expression versioning is applicable only to the existing expressions.

Image presents a bar that allows to choose expression version — Choosing a version of an expression

1. To access an expression, go to

**Behavioral Data Hub > Expressions**. 2. Click the chosen expression. 3. Make the changes to the expression. - To save the changes as a draft, click the **Finish later** button. - If you want to publish the changes, click the **Publish** button. - If you want to go back to the previous version: 1. In the right upper corner, click the

icon. 2. On the list of versions, find the one you want to restore. 3. Hover the mouse cursor over the version and click the

icon. 4. From the dropdown list, click either the **Publish** (to restore the other version of the expression) or **Edit** (to make changes to other version of the expression) button.

All analytics that contain expressions use the published version of the expression. When the expression version is changed, the analytics that contain them are updated automatically.

The list also contains drafts of the expression versions. They are not differentiated from the older, published versions of the expression.