When dealing with rule base layers, what two layer types can be utilized?

When dealing with rule base layers, two layer types can be utilized: Ordered Layers and Inline Layers5. Ordered Layers are executed sequentially according to their order in the policy. Inline Layers are embedded in a parent layer and are executed only if the parent rule matches. References: Check Point R81 Firewall Administration Guide, [Check Point R81 Security Management Administration Guide]