Exporters take every available piece of information from Supernova Universal Data Model and convert it to a programming code for a specific platform. How the exported code looks like is fully driven by the exporter and the project on which the exporter runs.
You can invoke export by selecting exporter from the list of available exporters located in the main menu.
Most importantly, exporters always run above the currently opened project. If there is no open project, exporters can't be invoked.