#### 5.1.2.1 IfcDefinitionSelect

IfcDefinitionSelect provides the option to either select an object or type object IfcObjectDefinition, or a property set template or property set, IfcPropertyDefinition.

> HISTORY New select type in IFC4.

XSD Specification:

<xs:group name="IfcDefinitionSelect">
<xs:choice>
<xs:element ref="ifc:IfcObjectDefinition"/>
<xs:element ref="ifc:IfcPropertyDefinition"/>
</xs:choice>
</xs:group>

EXPRESS Specification:

TYPE IfcDefinitionSelect = SELECT (
| IfcObjectDefinition, IfcPropertyDefinition);
END_TYPE;

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