The score-partwise element is the root element for a partwise MusicXML score. It includes a score-header group followed by a series of parts with measures inside. The document-attributes attribute group includes the version attribute.
<xs:element name="score-partwise" block="extension substitution" final="#all"><xs:annotation><xs:documentation>The score-partwise element is the root element for a partwise MusicXML score. It includes a score-header group followed by a series of parts with measures inside. The document-attributes attribute group includes the version attribute.</xs:documentation></xs:annotation><xs:complexType><xs:sequence><xs:group ref="score-header"/><xs:element name="part" maxOccurs="unbounded"><xs:complexType><xs:sequence><xs:element name="measure" maxOccurs="unbounded"><xs:complexType><xs:group ref="music-data"/><xs:attributeGroup ref="measure-attributes"/></xs:complexType></xs:element></xs:sequence><xs:attributeGroup ref="part-attributes"/></xs:complexType></xs:element></xs:sequence><xs:attributeGroup ref="document-attributes"/></xs:complexType></xs:element>