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General-Overview/Terminology.md

+## goSDN
+
+goSDN is the core of this project. A vendor agnostic SDN controller implementing industry standard SBIs
+
+## Principal Network Domain (PND)
+
+The Principal Network Domain is the single source of truth in the network.
+
+## Orchestrated Networking Device (OND)
+
+An OND is any kind of networking device orchestrated by goSDN.
+
+## Southbound Interface (SBI)
+
+A southbound interface is the standardised interface goSDN uses to communicate with a given OND.
+
+## Northbound Interface (NBI)
+
+A northbound interface is an interface to control the goSDN controller itself.
+
+## Transport
+
+The transport defines the wire format that is used for a given SBI.