The output is very flexible - you can define entry types as collections of "widgets", which would include stuff like a title, a cover image, a markdown body, etc. It's designed so you can use it as a CMS for almost any static site generator by defining how your data looks in the config - see https://github.com/netlify/netlify-cms/blob/master/example/c... for an example config (this is a configuration for the in-memory, non-persistent backend which we use for testing and demonstration).