Train Symbols on combined trains

Hello everyone I just joined. I Model trains in Run8. I like to model modern trains so I was wondering what train symbols are being used now days for the combined trains. Do they all Have mid train DPU's? I also Watch the cams on YouTube but no one seems to know any symbols. Thank you.

http://railroadfan.com/wiki/index.php/B ... in_Symbols

While not always accurate/up to date, it's a start.

yea it's ok but I was hoping that someone who was knowledgeable about the new stuff would respond. Maybe I'm in the wrong group IDK