The properties are reflective of the changes you make in the UI for that place. For example, some of the content types can be enabled by going to Manage > Settings of a space:
However, not all are available in all places. This document provides several other common types: Finding the Content ID and Place ID using Jive v3 API
If you are creating a new place or updating an existing place, I would recommend making all the changes in the front-end opposed to the extended properties page to ensure the location is correct as well as the property values are set appropriately. This will also help prevent potential errors.