<xs:simpleType name="IfcStairTypeEnum">
    <xs:restriction base="xs:string">
        <xs:enumeration value="straight_run_stair" />
        <xs:enumeration value="two_straight_run_stair" />
        <xs:enumeration value="quarter_winding_stair" />
        <xs:enumeration value="quarter_turn_stair" />
        <xs:enumeration value="half_winding_stair" />
        <xs:enumeration value="half_turn_stair" />
        <xs:enumeration value="two_quarter_winding_stair" />
        <xs:enumeration value="two_quarter_turn_stair" />
        <xs:enumeration value="three_quarter_winding_stair" />
        <xs:enumeration value="three_quarter_turn_stair" />
        <xs:enumeration value="spiral_stair" />
        <xs:enumeration value="double_return_stair" />
        <xs:enumeration value="curved_run_stair" />
        <xs:enumeration value="two_curved_run_stair" />
        <xs:enumeration value="userdefined" />
        <xs:enumeration value="notdefined" />
    </xs:restriction>
</xs:simpleType>

• IfcStairTypeEnum
• ifc:ShapeType
• ifc:IfcStairTypeEnum