At the bottom of the file you'll find examples of all the options that are available to use. The config file is formatted as XML, Extensible Markup Language XML which is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
The file that comes included with CasparCG has a minimal configuration for one channel running in PAL p50 or i50 in latest builds with a screen consumer and system audio as the only configured outputs, it doesn't enable Decklink or other output options out of the box. It's were you configure and setup your CasparCG server.
