Index: trunk/data/validator/unnecessary.mapcss
===================================================================
--- trunk/data/validator/unnecessary.mapcss	(revision 15419)
+++ trunk/data/validator/unnecessary.mapcss	(revision 15496)
@@ -168,9 +168,10 @@
 
 /* #2760 */
-*[/^gpx:/] {
+*[/^(gpx|gpxx|gpxd):/] {
   throwWarning: tr("{0} should not be uploaded", "{0.key}");
   group: tr("unnecessary tag");
   fixRemove: "{0.key}";
   assertMatch: "node gpx:time=2018-01-01T12:00:00Z";
+  assertMatch: "node gpxd:color=#FF0000";
   assertNoMatch: "node source=gpx:foo";
 }