IfcMove

IfcMove

Definition from IAI: An IfcMove is an activity that moves people, groups within an organization or complete organizations together with their associated furniture and equipment from one place to another. The objects to be moved, normally people, equipment, and furniture, are assigned by the IfcRelAssignsToProcess relationship.

ISSUES: See issue and change log for changes made in IFC 2x.
HISTORY: New Entity in IFC Release 2.0

Use Definitions

Each IfcMove has a name defined by the IfcObject.ObjectType attribute that is inherited. This must be asserted for an IfcMove.

The inherited attribute OperatesOn refers to the IfcRelAssignsToProcess relationship, keeping the reference to IfcActor, IfcEquipmentElement and IfcFurnituringElement. The QuantityInProcess attribute at the relationship object can be used to specify a quantity of the objects to be moved.

Moves can be nested, i.e. a move object can contain other (more detailed) move objects. This is handled by the IfcRelNests relationship pointing (with RelatingObject) to the containing move and (with RelatedObjects) to the contained (sub)moves.

Moves are assigned to a move schedule (represented as IfcWorkSchedule with Purpose attribute 'Move') by using the IfcRelAssignsTask relationship.

EXPRESS specification:

ENTITY IfcMove

SUBTYPE OF (

IfcTask);

MoveFrom

IfcSpatialStructureElement;

MoveTo

IfcSpatialStructureElement;

MoveConstraints

OPTIONAL SET [1:?] OF IfcActionTimeControl;

PunchList

OPTIONAL LIST [1:?] OF UNIQUE IfcLabel;

WHERE

WR1	:	SIZEOF(SELF\IfcProcess.OperatesOn) >= 1;
WR2	:	SIZEOF(QUERY(temp <* OperatesOn \| SIZEOF(QUERY(temp2 <* temp.RelatedObjects \| ('IFCKERNEL.IFCACTOR' IN TYPEOF (temp2)) OR ('IFCPRODUCTEXTENSION.IFCEQUIPMENTELEMENT' IN TYPEOF (temp2)) OR ('IFCPRODUCTEXTENSION.IFCFURNISHINGELEMENT' IN TYPEOF (temp2)) )) >=1 )) >= 1;

END_ENTITY;

Attribute definitions:

MoveFrom	:	The place from which actors and their associated equipment are moving.
MoveTo	:	The place to which actors and their associated equipment are moving.
MoveConstraints	:	The activity constraint for timing. The type of the constraint such as ‘as soon as possible’, ‘not start before’, ‘must start on’, ‘must finish on’, must start before’, ‘must finish before’, ‘may start after’, ‘must move out by’, etc. The value of ‘ConstaintType’ and ‘ConstraintDate’ makes a meaningful constraint.
PunchList	:	A list of points concerning a move that require attention.

Formal Propositions:

WR1	:	There has to be a reference to the IfcRelAssignsToProcess relationship referencing the objects to be moved.
WR2	:	At least on furnishing or equipment object should be assigned to the move.

References (1):

Name

Type

Referred through

Express-G

IfcTask

Entity

Subtype

Diagram 1

Inheritance graph

ENTITY IfcMove;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

Decomposes

SET OF IfcRelDecomposes FOR RelatedObjects;

IsDecomposedBy

SET [0:1] OF IfcRelDecomposes FOR RelatingObject;

ENTITY IfcProcess;

Productivity

OPTIONAL IfcMeasureWithUnit;

INVERSE

OperatesOn

SET OF IfcRelAssignsToProcess FOR RelatingProcess;

IsSuccessorFrom

SET OF IfcRelSequence FOR RelatedProcess;

IsPredecessorTo

SET OF IfcRelSequence FOR RelatingProcess;

ENTITY IfcTask;

TaskId

IfcIdentifier;

WBSCode

OPTIONAL LIST [1:?] OF UNIQUE IfcLabel;

WBSSource

OPTIONAL LIST [1:?] OF IfcLabel;

Status

IfcTaskStatusEnum;

Milestones

OPTIONAL SET [1:?] OF IfcTaskMilestoneEnum;

WorkMethod

OPTIONAL IfcLabel;

InPlaceQuantity

OPTIONAL IfcMeasureWithUnit;

EstimatedQuantity

OPTIONAL IfcMeasureWithUnit;

BudgetQuantity

OPTIONAL IfcMeasureWithUnit;

IsRootTask

BOOLEAN;

ENTITY IfcMove;

MoveFrom

IfcSpatialStructureElement;

MoveTo

IfcSpatialStructureElement;

MoveConstraints

OPTIONAL SET [1:?] OF IfcActionTimeControl;

PunchList

OPTIONAL LIST [1:?] OF UNIQUE IfcLabel;

END_ENTITY;