
<xsd:schema xmlns:xsd ="http://www.w3.org/2001/XMLSchema">
  
  <xsd:simpleType name="year">
    <!-- year is an XMLS datatype based on integer -->
    <xsd:restriction base="xsd:decimal"/>
  </xsd:simpleType>
  
  <xsd:simpleType name="wineYear">
    <!-- wineYear is an XMLS datatype based on year -->
    <!-- with the added restriction that values must be GEQ 1700 -->
    <xsd:restriction base="year">
      <xsd:minInclusive value="1700"/>
    </xsd:restriction>
  </xsd:simpleType>
  
</xsd:schema>