Which Properties Read for MKV files by DLNA

I am storing and serving movies/videos that are stored in .MKV files. I am trying to find information on which properties from these files are read by MyBook to populate the DLNA database.  I’d like to include several basic properties so that I can sort by Actors, Title, Year, etc etc…

Does someone know which properties are supported

Check if the link below helps. 

http://community.wd.com/t5/My-Book-Live/Movie-metadata-information-WD-DNLA-Media-Server/m-p/599591#M25213

That post is a good start as to what is stored in the database. The next part of the question is where does the My Book Live DLNA server read that information from? The MKV Header?   If so, what Tags in the MKV header map to the 10 upnp fields that are enumerated in that post?