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The SDNC network controller in FIgure Figure 1 illustrates the core OpenDaylight framework that supports a model driven service abstraction layer (MD-SAL), api handlers, operational and configuration trees, and an adapter framework for integrating with controlled devices, virtual functions, and cloud infrastructure. Within this framework the ONAP Service Logic Interpreter (SLI) addition provides an extensible scripting language for expressing service logic through a Direct Directed Graph (DG) builder based on Node-Red. The SLI is extended by adding Java classes that can be called as a node in a DG to support frequent complex operations.
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