| Name | Type | Description | 
| Basis | 
P_SINGLEVALUE
/
IfcLabel
/
 PEnum_UncertaintyBasis | 
Indication of the basis of the uncertainty
 | 
| Description | 
P_SINGLEVALUE
/
IfcText
 | 
General description of the uncertainty associated to the element or feature, its source and implications.
 | 
| HorizontalUncertainty | 
P_SINGLEVALUE
/
IfcPositiveLengthMeasure
 | 
Indicative (95%-100%) range diameter associated to the vertical shape and position in X, if different to the linear uncertainty.
 | 
| LinearUncertainty | 
P_SINGLEVALUE
/
IfcPositiveLengthMeasure
 | 
Indicative (95%-100%) range diameter associated to the overall shape and position in XYZ.
 | 
| OrthogonalUncertainty | 
P_SINGLEVALUE
/
IfcPositiveLengthMeasure
 | 
Indicative (95%-100%) range diameter associated to the horizontal shape and position in Y, if different to the horizontal uncertainty.
 | 
| VerticalUncertainty | 
P_SINGLEVALUE
/
IfcPositiveLengthMeasure
 | 
Indicative (95%-100%) range diameter associated to the vertical shape and position in Z, if different to the linear uncertainty.
 |