You can create your own custom feeds, respecting the specifications of the Content API. Once these JSON content feeds created on your website, you'll be able to add them as sources of your sections, using the Custom connector.
The values handled by the app are simple. Each element inherits from the Item type, and has some type specific attributes (like articles, maps for now and videos, events, photos... soon).
For each source type, it's possible to define several types of actions:
When you add a custom source, you'll have to enter the whole URL to access your custom feeds, so it's not mandatory to respect this naming convention.
Add a custom source in your section
1. In the left swipe menu go to My app > Structure
2. Click the green button "Add a section" from the right column
3. Select the custom source you want to add: Articles, Map, Photos, video, calendar or sound.
4. Paste the URL of your custom content feed, then click Add