Use Case: Listing Subcategories by Parent Category

A user selects a parent category in a category system. The system then wants to list only the subcategories associated with this category.

1. The user selects the parent category from a Select Box element.
2. This selection triggers the Get Categories action with the ParentId parameter.
3. The returned subcategories are listed in another Tree element or Table.
4. The user selects one of these subcategories to continue the process.