<xs:simpleType name="LevelOfContainmentCodeType">
  <xs:annotation>
    <xs:documentation>Fully adopted GS1 classifier: defines based on which type nutrient is measured</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NMTOKEN">
    <xs:pattern value="30"/>
    <!-- Substance Not Intentionally Included in Product  -->
    <xs:pattern value="50"/>
    <!-- Derived from -->
    <xs:pattern value="60"/>
    <!-- Not derived from -->
    <xs:pattern value="CONTAINS"/>
    <xs:pattern value="FREE_FROM"/>
    <xs:pattern value="MAY_CONTAIN"/>
    <xs:pattern value="UNDECLARED"/>
  </xs:restriction>
</xs:simpleType>