displayRole versus displayFormat

[simoncn]

(20-05-2018 18:00)antonmb Wrote:  My understanding is - take it with a grain of salt, I’ve been known to be quite wrong - that the displayrole links a tag to a particular control point field. For example, control points typically don’t have a “composer” field in their display, so the expression composer.displayrole={artist} tells the control point to show the composer tag in its artist field. So for instance I have composer, conductor, orchestra, chorus, and soloists tags all linked to the artist field with this setting.

This isn't correct. The composer.displayRole={artist} setting tells MinimServer to use the upnp:artist XML tag with the role="composer" XML attribute to convey composer information from the server to the control point. Whether or not the control point shows the composer information thus conveyed in place of artist information is for the control point to decide.