<xs:simpleType name="MaterialType">
  <xs:annotation>
    <xs:documentation>Specifies the primary type of material that a component is made of.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="aluminum"/>
    <xs:enumeration value="beryllium copper"/>
    <xs:enumeration value="chrome alloy"/>
    <xs:enumeration value="composite"/>
    <xs:enumeration value="other"/>
    <xs:enumeration value="non-magnetic steel"/>
    <xs:enumeration value="plastic"/>
    <xs:enumeration value="steel"/>
    <xs:enumeration value="steel alloy"/>
    <xs:enumeration value="titanium"/>
  </xs:restriction>
</xs:simpleType>