When trying to figure out content data points, I would first try to use the Data Item Browser (DIB) within Eikon. For example:
If you are unable to find the details here, try searching around the Q&A forums. For example, a similar question was asked which may help.
Otherwise, the best resources for content-related questions can be accessed by either using Contact Us capability in your Eikon application or by calling the Helpdesk number in your country.