mei:mei_data.LAYERSCHEME

<xs:simpleType name="mei_data.LAYERSCHEME">
  <xs:restriction base="xs:token">
    <xs:enumeration value="1">
      <xs:annotation>
        <xs:documentation>Single layer.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="2o">
      <xs:annotation>
        <xs:documentation>Two layers with opposing stems.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="2f">
      <xs:annotation>
        <xs:documentation>Two layers with 'floating' stems.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="3o">
      <xs:annotation>
        <xs:documentation/>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="3f">
      <xs:annotation>
        <xs:documentation/>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>