If you like to get articy:draft data into your own (game-) project and you are not using Unity or Unreal, using the JSON or XML export is a good start.
The XML export exports all of your project data objects and you can pick those you are interested in. A XSD schema is provided as description of the export format or to automatically create a file reader using the XSD tool from Microsoft. This format is best suited for C# based import code.
The JSON export is similar to the XML export, but offers more configuration options to exclude parts of the file (e.g. the Template descriptions & property restrictions) but works as “rule-set” based export that allows filtering of objects by type (template) or hierarchy.