Exporting an application creates a JSON file (file extension json) that contains the application's properties, components (and their associated properties and processes), and processes. For information about JSON, see http://www.json.org/.
On the Applications pane Home > Applications), Actions field, click the Export link. You can load the file into a text editor, or save it. If you save it, a file is created with the same name as the selected component, for example, helloWorldApplication.json.