up-down 

The up-down type is used for arrow direction, indicating which way the tip is pointing.

Simple Type Information

Used By

Attributes arpeggiate/@direction, strong-accent/@type

Source 

<xs:simpleType name="up-down">
  <xs:annotation>
    <xs:documentation>The up-down type is used for arrow direction, indicating which way the tip is pointing.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:token">
    <xs:enumeration value="up"/>
    <xs:enumeration value="down"/>
  </xs:restriction>
</xs:simpleType>