ifc:IfcAnalysisTheoryTypeEnum

<xs:simpleType name="IfcAnalysisTheoryTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="first_order_theory"/>
    <xs:enumeration value="second_order_theory"/>
    <xs:enumeration value="third_order_theory"/>
    <xs:enumeration value="full_nonlinear_theory"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefined"/>
  </xs:restriction>
</xs:simpleType>