+@knownissues
+Only one quality modifier should be used per chord, typically on the
+highest step present in the chord. Chords with more than quality
+modifier will be parsed without an error or warning, but the results
+are unpredictable. Chords that cannot be achieved with a single
+quality modifier should be altered by individual pitches, as described
+in @ref{Extended and altered chords}.
+
+