This implementation must offer: - a REST API built on **user-provided** Nokia's Network-as-Code (Nac) library, exposing available resources - a controller that: - synchronizes with the NaC REST API and creates the respective Resource Specifications and Resources in OpenSlice Resource Catalog & Inventory - connects to the OpenSlice message bus and subscribes to events based on NaC Resource Specifications. When a service orchestration involves NaC Resource Specifications, the controller forwards the requests to the REST API and the NaC, respectively