What does the <modelname>.json file do?

The <modelname>.json file, for example transport.json , is located in the <modelname>/conf_<modelname> directory. It contains the configuration of graphics, input widgets, language and all other model-specific configurations for a MIRO app. This file can be filled manually by the user. However, the easiest way for the configuration is the Configuration Mode.
Like the <modelname>_io.json file, the structure of this file is based on a schema with which the file is validated when a MIRO app is started.