mei:mei_att.curvature.attribute.curvedir

<xs:attributeGroup name="mei_att.curvature.attribute.curvedir">
  <xs:attribute name="curvedir">
    <xs:annotation>
      <xs:documentation>Describes a curve with a generic term indicating the direction of curvature.</xs:documentation>
    </xs:annotation>
    <xs:simpleType>
      <xs:restriction base="xs:token">
        <xs:enumeration value="above">
          <xs:annotation>
            <xs:documentation>Upward curve.</xs:documentation>
          </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="below">
          <xs:annotation>
            <xs:documentation>Downward curve.</xs:documentation>
          </xs:annotation>
        </xs:enumeration>
        <xs:enumeration value="mixed">
          <xs:annotation>
            <xs:documentation>A "meandering" curve, both above and below the items it pertains to.</xs:documentation>
          </xs:annotation>
        </xs:enumeration>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
</xs:attributeGroup>