Displaying half-star ratings

[simoncn]

With MinimServer update 242, BubbleUPnP will receive a star rating of 1 to 5 in the upnp:rating property.

For a FLAC file, this value will be provided by the RATING tag. For an MP3 file that uses the POPM frame to provide a rating value in the range 1 to 255, this value will be mapped by MinimServer to a RATING value in the range 1 to 5.

There is no need for any tagUpdate mapping and I don't understand why you think there is a need for rating values in the range 20 to 100.