+ SCM long_text = get_property ("instrumentName");
+ SCM short_text = get_property ("shortInstrumentName");
+
+ if (!(Text_interface::is_markup (long_text)
+ || Text_interface::is_markup (short_text)))
+ {
+ long_text = get_property ("vocalName");
+ short_text = get_property ("shortVocalName");
+ }
+
+ if ((Text_interface::is_markup (long_text)
+ || Text_interface::is_markup (short_text))
+ && (!text_spanner_
+ || short_text_ != short_text
+ || long_text_ != long_text))