IfcWorkSchedule

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcWorkSchedule
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
Identification		X	MODIFIED	Name changed from Identifier to Identification. Instantiation changed to OPTIONAL.
CreationDate	X	X	MODIFIED	Type changed from IfcDateTimeSelect to IfcDateTime.
Duration	X	X	MODIFIED	Type changed from IfcTimeMeasure to IfcDuration.
TotalFloat	X	X	MODIFIED	Type changed from IfcTimeMeasure to IfcDuration.
StartTime	X	X	MODIFIED	Type changed from IfcDateTimeSelect to IfcDateTime.
FinishTime	X	X	MODIFIED	Type changed from IfcDateTimeSelect to IfcDateTime.
PredefinedType			MODIFIED	Name changed from WorkControlType to PredefinedType. Type changed from IfcWorkControlTypeEnum to IfcWorkScheduleTypeEnum.
UserDefinedControlType	X		DELETED

Semantic definitions at the entity

Entity definition

An IfcWorkSchedule represents a task schedule of a work plan, which in turn can contain a set of schedules for different purposes.

HISTORY New entity in IFC2.0.

Declaration Use Definition

IfcWorkSchedule can reference a project (the single IfcProject instance) via IfcRelDeclares.

Figure 156 shows the backbone structure of a work schedule that defines (1) a context through IfcRelDeclares (not necessarily the project) and (2) controls tasks (typically the schedule summary task) and resources. Please note that a work calendar shall be assigned to the summary task and not the work schedule.

If an assigned IfcTask is a root-level task, such task must be declared on the IfcProject using the IfcRelDeclares relationship.

Figure 156 — Work schedule relationships

Attribute definitions

#	Attribute	Type	Cardinality	Description	B
14	PredefinedType	IfcWorkScheduleTypeEnum	[0:1]	Identifies the predefined types of a work schedule from which the type required may be set.	X

Formal Propositions

Rule	Description
CorrectPredefinedType	The attribute ObjectType must be asserted when the value of the IfcWorkScheduleTypeEnum is set to USERDEFINED.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	B
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, NOTE only the last modification in stored - either as addition, deletion or modification.	X
3	Name	IfcLabel	[0:1]	Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.	X
4	Description	IfcText	[0:1]	Optional description, provided for exchanging informative comments.	X
IfcObjectDefinition
	HasAssignments	IfcRelAssigns @RelatedObjects	S[0:?]	Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups.	X
	Nests	IfcRelNests @RelatedObjects	S[0:1]	References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).
	IsNestedBy	IfcRelNests @RelatingObject	S[0:?]	References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types).	X
	HasContext	IfcRelDeclares @RelatedDefinitions	S[0:1]	References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.
	IsDecomposedBy	IfcRelAggregates @RelatingObject	S[0:?]	References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts).	X
	Decomposes	IfcRelAggregates @RelatedObjects	S[0:1]	References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only).	X
	HasAssociations	IfcRelAssociates @RelatedObjects	S[0:?]	Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.	X
IfcObject
5	ObjectType	-		This attribute is out of scope for this model view definition and shall not be set.
	IsTypedBy	IfcRelDefinesByType @RelatedObjects	S[0:1]	Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type.	X
	IsDefinedBy	IfcRelDefinesByProperties @RelatedObjects	S[0:?]	Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object.	X
IfcControl
6	Identification	-		This attribute is out of scope for this model view definition and shall not be set.
	Controls	IfcRelAssignsToControl @RelatingControl	S[0:?]	Reference to the relationship that associates the control to the object(s) being controlled.	X
IfcWorkControl
7	CreationDate	IfcDateTime	[1:1]	The date that the plan is created.	X
8	Creators	-		This attribute is out of scope for this model view definition and shall not be set.
9	Purpose	-		This attribute is out of scope for this model view definition and shall not be set.
10	Duration	-		This attribute is out of scope for this model view definition and shall not be set.
11	TotalFloat	-		This attribute is out of scope for this model view definition and shall not be set.
12	StartTime	IfcDateTime	[1:1]	The start time of the schedule.	X
13	FinishTime	-		This attribute is out of scope for this model view definition and shall not be set.
IfcWorkSchedule
14	PredefinedType	IfcWorkScheduleTypeEnum	[0:1]	Identifies the predefined types of a work schedule from which the type required may be set.	X

Definitions applying to Bridge View

Instance diagram

Concept usage

Control Assignment

The Control Assignment concept applies to this entity as shown in Table 7.

Type
IfcTask

Table 7 — IfcWorkSchedule Control Assignment

Exchange
Import				O
Export				O

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Bridge View
	User Identity	Bridge View
	Object Ownership	Bridge View
IfcObject
	Property Sets for Objects	Bridge View
IfcWorkSchedule
	Control Assignment	Bridge View

Formal representations

XSD Specification

 <xs:element name="IfcWorkSchedule" type="ifc:IfcWorkSchedule" substitutionGroup="ifc:IfcWorkControl" nillable="true"/>

 <xs:complexType name="IfcWorkSchedule">

  <xs:complexContent>

   <xs:extension base="ifc:IfcWorkControl">

    <xs:attribute name="PredefinedType" type="ifc:IfcWorkScheduleTypeEnum" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcWorkSchedule

 SUBTYPE OF (IfcWorkControl);

  PredefinedType : OPTIONAL IfcWorkScheduleTypeEnum;

 WHERE

  CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcWorkScheduleTypeEnum.USERDEFINED) OR
((PredefinedType = IfcWorkScheduleTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Arbeitsprogramm
	Work Schedule
	Tache unitaire de travail