IfcConditionCriterion

Definition from IAI: An IfcConditionCriterion is a particular measured or assessed criterion that contributes to the overall condition of an artefact.

HISTORY: New class in IFC 2x2

Use Definitions

An IfcConditionCriterion may be either an observed/assessed value or a measured value. This is determined by selection through the IfcConditionCriterionSelect type that has a datatype either of IfcLabel (for a numeric or alphanumeric scale observation e.g. on a scale of 1 to 10 where 1 represents 'as new' and 10 represents 'urgent replacement required') or of IfcMeasureWithUnit (for a measured criterion that also includes units of measure).

Each criterion must be named and optionally, may also have a description. A description used for a condition should be persistent so that there is absolute consistency in condition recording.

EXPRESS specification:

ENTITY IfcConditionCriterion

SUBTYPE OF (

IfcControl);

Criterion

IfcConditionCriterionSelect;

CriterionDateTime

IfcDateTimeSelect;

WHERE

WR1

EXISTS(SELF\IfcRoot.Name);

END_ENTITY;

Attribute definitions:

Criterion	:	The measured or assessed value of a criterion.
CriterionDateTime	:	The time and/or date at which the criterion is determined.

Formal Propositions:

WR1

The Name attribute has to be provided for the condition criterion.

Inheritance graph

ENTITY IfcConditionCriterion;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

ENTITY IfcControl;

INVERSE

Controls

SET OF IfcRelAssignsToControl FOR RelatingControl;

ENTITY IfcConditionCriterion;

Criterion

IfcConditionCriterionSelect;

CriterionDateTime

IfcDateTimeSelect;

END_ENTITY;