<xsd:simpleType name="academicPeriodT" >
  <xsd:restriction base="xsd:string">
    <xsd:enumeration value="Y">
      <xsd:annotation>
        <xsd:documentation>Full year</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
    <xsd:enumeration value="S1">
      <xsd:annotation>
        <xsd:documentation>Winter semester</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
    <xsd:enumeration value="S2">
      <xsd:annotation>
        <xsd:documentation>Summer semester</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
    <xsd:enumeration value="T1">
      <xsd:annotation>
        <xsd:documentation>First trimester</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
    <xsd:enumeration value="T2">
      <xsd:annotation>
        <xsd:documentation>Second trimester</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
    <xsd:enumeration value="T3">
      <xsd:annotation>
        <xsd:documentation>Third trimester</xsd:documentation>
      </xsd:annotation>
    </xsd:enumeration>
  </xsd:restriction>
</xsd:simpleType>