Clarity on displayRole and displayFormat

[paultaylor]

Im having some issue understanding the interplay between displayRole and displayFormat. By default MinimServer has Artist.displayFormat={$artist$orchestra$conductor} in tagFormat, since for classical SongKong already treat artist as a meta field that is configured as performer,orchestra/choir/ensemble,conductor anyway I removed this.



But when I view a group sometimes it shows the value of the artist field and sometimes the value of the composer field, cant account for the difference.





I still have tagCustom set to Composer.displayRole={artist}, i have read the manual a number of times but I dont understand what this actually does in terms of affecting Kinsky, however if I remove it then sometimes the year shown instead of artist/composer.