Hierarchy Expression

Hello, I'm wondering if class-related expressions are possible.

Lv1, Lv2, and Lv3 layers exist as shown in the picture below, so is there a way to check the layers by adding detailed items for each level?

[Condition]
1. Each value will contain text.
2. Can contain multiple values by hierarchy.

The image above is when you select a layer in the order of B --> B-2 --> B-2-1.