Nucleus/Principal-Network-Domain.md

+```plantuml
+interface PrincipalNetworkDomain  {
+        + Destroy() error
+        + AddSbi() error
+        + RemoveSbi() error
+        + AddDevice() error
+        + RemoveDevice() error
+
+    }
+```
+
+```plantuml
+class pndImplementation << (S,Aquamarine) >> {
+        - name string
+        - sbiContainer []nucleus.SouthboundInterface
+
+        + Destroy() error
+        + AddSbi() error
+        + RemoveSbi() error
+
+    }
+```
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