labeling devices and patch panels

We are working on a large wireless AP upgrade.  Our building has multiple com rooms and several hundred AP's.  I am looking for some best practices for labeling the AP devices and corresponding patch panel ports.  I am not asking for a label machine instead i am looking for the naming convention that would provide the most valuable troubleshooting information.  

Some ideas that i currently have:  
If the AP is located by room 302 and connects to a patch panel in com room 200  then the label could be " R302CR200 ".  This seems to be valuable for physical layer troubleshooting.  

I am really interested in knowing if someone has a naming convention in a large building that incorporates the best information in the label.

thanks!