#### 8.3.2.5 IfcDataOriginEnum

IfcDataOriginEnum identifies the origin of time data.

> HISTORY New enumeration in IFC2x2.

Enumerated Item Definitions:

- MEASURED: The origin of the time data is a measurement device.
- PREDICTED: The time data are a prediction.
- SIMULATED: The origin of the time data is a simulation.
- NOTDEFINED: The origin of the time data is undefined.

XSD Specification:

<xs:simpleType name="IfcDataOriginEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="measured"/>
<xs:enumeration value="predicted"/>
<xs:enumeration value="simulated"/>
<xs:enumeration value="userdefined"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>

EXPRESS Specification:

TYPE IfcDataOriginEnum = ENUMERATION OF (
| MEASURED, PREDICTED, SIMULATED, USERDEFINED, NOTDEFINED);
END_TYPE;

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