home.md

 ```plantuml
-Bob->Alice : hello
-Alice -> Bob : hi
+@startuml gosdn
+namespace arista {
+    class SBI << (S,Aquamarine) >> {
+        - transport nucleus.Transport
+    }
+}
+
+namespace ciena {
+    class SBI << (S,Aquamarine) >> {
+        - transport nucleus.Transport
+    }
+}
+
+namespace nucleus {
+    class Core << (S,Aquamarine) >> {
+        - clients <font color=blue>map</font>[string]nucleus.Client
+        - database database.Database
+        - config controllerConfig
+
+        + IsRunning <font color=blue>chan</font> bool
+
+        - readControllerConfig(configFileController string) error
+
+        + Init(socket string, configFileController string, configFileClient string, IsRunningChannel <font color=blue>chan</font> bool) 
+        + AttachDatabase() 
+        + Shutdown() 
+
+    }
+    class Device  {
+        - device ygot.Device
+        - Sbi nucleus.SouthboundInterface
+        - Config nucleus.DeviceConfig
+    }
+
+    class controllerConfig << (S,Aquamarine) >> {
+        + CliSocket string
+        + DatabaseSocket string
+        + DatabaseUser string
+        + DatabasePassword string
+        + DatabaseCrypto bool
+        + ConfigPath string
+
+    }
+    class pndImplementation << (S,Aquamarine) >> {
+        - name string
+        - sbiContainer map[string]nucleus.SouthboundInterface
+        - devices map[uuid]Device
+
+    }
+
+        class Database << (S,Aquamarine) >> {
+        - driver neo4j.Driver
+
+        + StorePND(pnd *PND) neo4j.Node
+        + RemovePND(id string) 
+        + GetPNDByID(id string) 
+        + GetNodesByLabel(label string) 
+        + GetNodeByID(id string) 
+        + StoreNodes(json string) []neo4j.Node
+        + RemoveNodes(json string) 
+        + RemoveSingleNode(id string) 
+        + StoreLinks(json string) []neo4j.Relationship
+        + StoreNodeEdgePoints(json string) 
+        + StoreConnections(json string) 
+        + Shutdown() error
+
+    }
+
+    class gnmi << (S,Aquamarine) >> {
+
+    }
+
+    class restconf << (S,Aquamarine) >> {
+
+    }
+    class tapi << (S,Aquamarine) >> {
+        - transport nucleus.Transport
+
+        + GetConnections(Device) ([]byte, error)
+        + GetLinks(Device) ([]byte, error)
+        + GetNodes(Device) ([]byte, error)
+        + GetNodeEdgePoints(Device) ([]byte, error)
+    }
+    class openconfig << (S,Aquamarine) >> {
+        - transport nucleus.Transport
+    }
+
+    class DeviceConfig << (S,Aquamarine) >> {
+        + Identifier uuid
+        + Endpoint string
+        + Username string
+        + Password string
+    }
+    interface PrincipalNetworkDomain  {
+        + Destroy() error
+        + AddSbi() error
+        + RemoveSbi() error
+        + AddDevice() error
+        + RemoveDevice() error
+
+    }
+    interface SouthboundInterface  {
+        + AddClient() error
+        + RemoveClient() error
+        + CollectHeartbeats() error
+        + ListClients() <font color=blue>map</font>[int]Client
+
+    }
+    interface Transport  {
+        + SetConfig( <font color=blue>interface</font>{}) error
+        + GetConfig() <font color=blue>interface</font>{}
+
+    }
+}
+
+"nucleus.PrincipalNetworkDomain" <|-- "nucleus.pndImplementation"
+"nucleus.PrincipalNetworkDomain" "1" *-- "many" "nucleus.Device"
+"nucleus.PrincipalNetworkDomain" "1" *-- "many" "nucleus.SouthboundInterface"
+"nucleus.Transport" <|-- "nucleus.gnmi"
+"nucleus.Transport" <|-- "nucleus.restconf"
+"nucleus.Device" <|-- "nucleus.DeviceConfig"
+"nucleus.SouthboundInterface" <|-- "nucleus.Transport"
+"nucleus.SouthboundInterface" <|-- "nucleus.tapi"
+"nucleus.SouthboundInterface" <|-- "nucleus.openconfig"
+"nucleus.SouthboundInterface" <|-- "arista.SBI"
+"nucleus.SouthboundInterface" <|-- "ciena.SBI"
+"nucleus.Core" <|-- "nucleus.controllerConfig"
+"nucleus.Core" <|-- "nucleus.Database"
+"nucleus.Core" "1" *-- "many" "nucleus.PrincipalNetworkDomain"
+@enduml
+
 ```
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