IfcQuantityTime

Definition from IAI: An element quantity that defines a time measure to provide an property of time related to an element. It is normally given by the recipe information of the element under the specific measure rules given by a method of measurement.

> EXAMPLE: The amount of time needed to pour concrete for a wall is given as a time quantity for the labor part of the recipe information.

> HISTORY New entity in Release IFC 2x Edition 2

EXPRESS specification:

ENTITY IfcQuantityTime
SUBTYPE OF ( | IfcPhysicalSimpleQuantity);
TimeValue | : | IfcTimeMeasure;
WHERE
WR21 | : | NOT(EXISTS(SELF\IfcPhysicalSimpleQuantity.Unit)) OR (SELF\IfcPhysicalSimpleQuantity.Unit.UnitType = IfcUnitEnum.TIMEUNIT);
WR22 | : | TimeValue >= 0.;
END_ENTITY;

Attribute definitions:

TimeValue | : | Time measure value of this quantity.

Formal Propositions:

WR21 | : | If a unit is given, the unit type shall be time unit.
WR22 | : | A valid weight quantity shall be greater than or equal to zero.

Inheritance graph

ENTITY IfcQuantityTime;
ENTITY IfcPhysicalQuantity;
Name | : | IfcLabel;
Description | : | OPTIONAL IfcText;
INVERSE
PartOfComplex | : | SET [0:1] OF IfcPhysicalComplexQuantity FOR HasQuantities;
ENTITY IfcPhysicalSimpleQuantity;
Unit | : | OPTIONAL IfcNamedUnit;
ENTITY IfcQuantityTime;
TimeValue | : | IfcTimeMeasure;
END_ENTITY;