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Definition from buildingSMART International: The entity IfcRelConnectsWithEccentricity adds the definition of eccentricity to the connection between a structural member and a structural connection (representing either a node or support). 

HISTORY  New entity in Release IFC2x Edition 3.

Use Definition

Point Connection
Instances of the entity IfcRelConnectsWithEccentricity shall be used to describe a connection with eccentricity between an instance of IfcStructuralPointConnection and an instance of IfcStructuralCurveMember or IfcStructuralSurfaceMember. The RelatedStructuralConnection for point connections therefore has to be of type'IfcStructuralPointConnection'. The eccentricity is defined by a connection constraint being of type 'IfcConnectionPointGeometry', or by its subtype 'IfcConnectionPointEccentricity'. It refers to the IfcVertexPoint, used by the IfcStructuralCurveMember, or IfcStructuralSurfaceMember, that is used in this connection, and optionally to the IfcVertexPoint, used by the IfcStructuralPointConnection. In addition the eccentricity can be given by x, y, and z distance values.

EXPRESS specification:

ENTITY IfcRelConnectsWithEccentricity
SUBTYPE OF ( IfcRelConnectsStructuralMember);
ConnectionConstraint  :  IfcConnectionGeometry;

Attribute definitions:

ConnectionConstraint  :  The connection constraint explicitly states the eccentricity between a structural element and a structural connection, either given by two point (used to calculate the eccentricity), or by explicit x, y, and z offsets.

Inheritance graph

ENTITY IfcRelConnectsWithEccentricity;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcRelationship;
ENTITY IfcRelConnects;
ENTITY IfcRelConnectsStructuralMember;
RelatingStructuralMember  :  IfcStructuralMember;
RelatedStructuralConnection  :  IfcStructuralConnection;
AppliedCondition  :  OPTIONAL IfcBoundaryCondition;
AdditionalConditions  :  OPTIONAL IfcStructuralConnectionCondition;
SupportedLength  :  OPTIONAL IfcLengthMeasure;
ConditionCoordinateSystem  :  OPTIONAL IfcAxis2Placement3D;
ENTITY IfcRelConnectsWithEccentricity;
ConnectionConstraint  :  IfcConnectionGeometry;