IfcConstraintEnum

Semantic definitions at the type

Type definition

IfcConstraintEnum is an enumeration used to qualify a constraint.

HISTORY New enumeration in IFC2.0

Enumeration definition

Constant	Description
HARD	Qualifies a constraint such that it must be followed rigidly within or at the values set.
SOFT	Qualifies a constraint such that it should be followed within or at the values set.
ADVISORY	Qualifies a constraint such that it is advised that it is followed within or at the values set.
USERDEFINED	A user-defined grade indicated by a separate attribute at the referencing entity.
NOTDEFINED	Grade has not been specified.

Formal representations

XML Specification

 <xs:simpleType name="IfcConstraintEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="hard"/>

   <xs:enumeration value="soft"/>

   <xs:enumeration value="advisory"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcConstraintEnum = ENUMERATION OF (

 HARD, 
 SOFT, 
 ADVISORY, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram

	Constraint Enum
	Enumération des types de contrainte