As we mentioned before, the Metadata can be used to get cascade variables by pulling from its parent category. In this article, we will use Lookup (in form designer) to get its cascaded values. You can use either of them per to data requirement.

Note: you may refer to know how to Use Metadata and cascade.

Contrastively we set the same data as we did with metadata.

Let's create a new item of Data List in Applications.

As exampled, we already had a data list named "Expense Categories", and you can see the each item with ① -->②-->③

Go to Form Designer.

Let's drag and drop three Metadata controls according to our example, You may add more cascades as required. All variables should be bound to the same Metadata.

The first is the Parent-category 1, which is no associated parent;

The second is the Subcategory 2, which is associated with Parent-category 1;

The third is the Subcategory 3, which is associated with Subcategory 2;

Then let's set the "Dynamic Display Rules" in subcategory 2&3 , which makes a cascade view.

Preview and check the results before it publishs.

In some scenarios, you can also use it in list control/variable.