Used in operations to specify the primitive type of an IFCData. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Members
| Member name | Description | 
|---|---|
| Integer | Integer. | 
| Double | Double. | 
| Boolean | Boolean. | 
| Logical | IFCLogical type. | 
| String | String. | 
| Binary | Binary. When reading or writing an IFCData of primitive type Binary, the value will be the string representation of the binary value as seen in the IFC specification. | 
| Enumeration | Enumeration. When reading or writing an IFCData of primitive type Enumeration, the value will be the string representation of the enumeration value as seen in the IFC specification. | 
| Instance | Represents IFCAnyHandle. | 
| Aggregate | Represents IFCAggregate. | 
| Unknown | Unknown. |