displayRole versus displayFormat

[haggis999]

Before I made my OP, I tried to work out the purpose of my long-standing tagCustom and tagFormat settings by reading the online User Guide. The description of tagFormat was quite complex, but I got the general idea. However, I found the description of tagCustom to be particularly opaque. I then tried each setting by itself and convinced myself that they each had the capability of making a control point display the Composer name in place of the Artist on the Now Playing screen.

However, I have just re-run those tests and got different results. I had always run a rescan of MinimServer after making my changes and refreshed the server link on my control points, but I now suspect that I may have failed to refresh the Now Playing screen on some occasions and thoroughly confused myself

I'm still quite bewildered by the User Guide description of tagCustom, but I can now see that the real effect of tagCustom=Composer.displayRole={artist} in my case is that it enables the optional display of Composer on BubbleUPnP's Now Playing screen. Contrary to my initial belief, this setting does NOT make a control point display the Composer name in place of the Artist (that is only achieved via my tagFormat setting).

My biggest source of confusion with this tagCustom setting is that I don't understand why it contains the word 'artist'. If the purpose is "sending the composer as the composer value", then having tagCustom=Composer.displayRole={composer} would seem more logical to my simple mind! I also struggle to understand why you need any special setting for "sending the composer as the composer value" when the absence of that setting does not prevent the browsing tree from successfully displaying all my Composer names.

All this brain fog would probably be dissipated by a clearer definition of displayRole.