The root type indicates a pitch like C, D, E vs. a function indication like I, II, III. It is used with chord symbols in popular music. The root element has a root-step and optional root-alter element similar to the step and alter elements, but renamed to distinguish the different musical meanings.
<xs:complexType name="root"><xs:annotation><xs:documentation>The root type indicates a pitch like C, D, E vs. a function indication like I, II, III. It is used with chord symbols in popular music. The root element has a root-step and optional root-alter element similar to the step and alter elements, but renamed to distinguish the different musical meanings.</xs:documentation></xs:annotation><xs:sequence><xs:element name="root-step" type="root-step"/><xs:element name="root-alter" type="root-alter" minOccurs="0"/></xs:sequence></xs:complexType>