unrecognized XipComment

Just deleted music db and rescan them, got a bunch of unrecognized XipComment. Any plan to support them, such as TOTALDISCS, TOTALTRACKS?

Code:
DEBUG: unrecognized XipComment name: ALBUMARTISTSORT          
DEBUG: unrecognized XipComment name: ARTISTSORT                
DEBUG: unrecognized XipComment name: ASIN                      
DEBUG: unrecognized XipComment name: BARCODE                  
DEBUG: unrecognized XipComment name: CATALOGNUMBER            
DEBUG: unrecognized XipComment name: DISCTOTAL                
DEBUG: unrecognized XipComment name: FILEOWNER                
DEBUG: unrecognized XipComment name: ISRC                      
DEBUG: unrecognized XipComment name: MEDIA                    
DEBUG: unrecognized XipComment name: MUSICBRAINZ_RELEASEGROUPID
DEBUG: unrecognized XipComment name: MUSICBRAINZ_RELEASETRACKID
DEBUG: unrecognized XipComment name: ORIGINALDATE              
DEBUG: unrecognized XipComment name: ORIGINALYEAR              
DEBUG: unrecognized XipComment name: RELEASECOUNTRY            
DEBUG: unrecognized XipComment name: RELEASESTATUS            
DEBUG: unrecognized XipComment name: SCRIPT                    
DEBUG: unrecognized XipComment name: TOTALDISCS                
DEBUG: unrecognized XipComment name: TOTALTRACKS              
DEBUG: unrecognized XipComment name: TRACKTOTAL