About figuring out what properties are available on of these Codebeamer objects: please look at the remote-api documentation and the javadoc found in. As you may already know Codebeamer provides a rich API for querying and manipulating Codebeamer objects programmatically using an RPC protocol. This API is documented here:

So the remote-api contains the Javadoc of most internal Codebeamer objects I've listed above, and is shipped with the Codebeamer distribution. You can find it below your Codebeamer installation directory on a path like: $CB_HOME/tomcat/webapps/cb/Codebeamer-api-{version}.zip. If you unzip this zip file somewhere then you will see a "docs/api/" directory where the generated Javadoc resides. Open the index.html here and you will find the Javadoc and properties of the objects (like our TrackerItemDto)

Be warned however that the signature of these objects, the export scripts may and practically will change between any new Codebeamer releases in the future. I would strongly recommend that you try to keep your customizations as isolated as possible, and using a git repository for tracking such changes is recommended. This will make your life much easier if you plan to upgrade Codebeamer in the future.