IfcWorkSchedule

Natural language names
deArbeitsprogramm
enWork Schedule
frTache unitaire de travail
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcWorkSchedule
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      IdentificationXMODIFIEDName changed from Identifier to Identification.
Instantiation changed to OPTIONAL.
      CreationDateXXMODIFIEDType changed from IfcDateTimeSelect to IfcDateTime.
      DurationXXMODIFIEDType changed from IfcTimeMeasure to IfcDuration.
      TotalFloatXXMODIFIEDType changed from IfcTimeMeasure to IfcDuration.
      StartTimeXXMODIFIEDType changed from IfcDateTimeSelect to IfcDateTime.
      FinishTimeXXMODIFIEDType changed from IfcDateTimeSelect to IfcDateTime.
      PredefinedTypeMODIFIEDName changed from WorkControlType to PredefinedType.
Type changed from IfcWorkControlTypeEnum to IfcWorkScheduleTypeEnum.
      UserDefinedControlTypeXDELETED
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 134 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.

work schedule instantiation diagram

Figure 134 — Work schedule relationships

Attribute definitions
#AttributeTypeCardinalityDescription C
14PredefinedTypeIfcWorkScheduleTypeEnum[0:1] Identifies the predefined types of a work schedule from which the type required may be set.X
Formal Propositions
RuleDescription
CorrectPredefinedTypeThe attribute ObjectType must be asserted when the value of the IfcWorkScheduleTypeEnum is set to USERDEFINED.
Inherited definitions from supertypes
Entity inheritance IfcWorkControl IfcControl IfcObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcRoot
1GlobalIdIfcGloballyUniqueId[1:1] Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory[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
3NameIfcLabel[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
4DescriptionIfcText[0:1] Optional description, provided for exchanging informative comments.X
IfcObjectDefinition
HasAssignmentsIfcRelAssigns
@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
NestsIfcRelNests
@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). X
IsNestedByIfcRelNests
@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
HasContextIfcRelDeclares
@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. X
IsDecomposedByIfcRelAggregates
@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
DecomposesIfcRelAggregates
@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
HasAssociationsIfcRelAssociates
@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
5ObjectTypeIfcLabel[0:1] The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.
X
IsDeclaredByIfcRelDefinesByObject
@RelatedObjects		S[0:1]Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. X
DeclaresIfcRelDefinesByObject
@RelatingObject		S[0:?]Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. X
IsTypedByIfcRelDefinesByType
@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
IsDefinedByIfcRelDefinesByProperties
@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
6IdentificationIfcIdentifier[0:1] An identifying designation given to a control It is the identifier at the occurrence level. X
ControlsIfcRelAssignsToControl
@RelatingControl		S[0:?]Reference to the relationship that associates the control to the object(s) being controlled. X
IfcWorkControl
7CreationDateIfcDateTime[1:1] The date that the plan is created.X
8CreatorsIfcPersonS[1:?] The authors of the work plan.X
9PurposeIfcLabel[0:1] A description of the purpose of the work schedule.X
10DurationIfcDuration[0:1] The total duration of the entire work schedule.X
11TotalFloatIfcDuration[0:1] The total time float of the entire work schedule.X
12StartTimeIfcDateTime[1:1] The start time of the schedule.X
13FinishTimeIfcDateTime[0:1] The finish time of the schedule.X
IfcWorkSchedule
14PredefinedTypeIfcWorkScheduleTypeEnum[0:1] Identifies the predefined types of a work schedule from which the type required may be set.X
Definitions applying to Common Use Definitions

 Instance diagram

Concept usage

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 19.

PredefinedTypeNameProperties
 Pset_WorkControlCommonSingle Value
NameValue
WorkStartTimeIfcTime
WorkFinishTimeIfcTime
WorkDayDurationIfcDuration
WorkWeekDurationIfcDuration
WorkMonthDurationIfcDuration

Table 19 — IfcWorkSchedule Property Sets for Objects



Document Association

The Document Association concept applies to this entity.

The documents of the IfcWorkSchedule can be referenced by the IfcRelAssociatesDocuments relationship.



Control Assignment

The Control Assignment concept applies to this entity.

An IfcWorkSchedule controls a set of tasks and resources defined through IfcRelAssignsToControl. Additionally, through the IfcWorkControl abstract supertype, the actors creating the schedule can be specified and schedule time information such as start time, finish time, and total float of the schedule can also be specified.



Object Nesting

The Object Nesting concept applies to this entity.

A work schedule can include other work schedules as sub-items through IfcRelNests relationship.



Aggregation

The Aggregation concept applies to this entity.

A work schedule can include other work schedules as sub-items. If not included in another work schedule it might be a part of a work plan (IfcWorkPlan) defined through IfcRelAggregates relationship.



Concept inheritance

#ConceptModel View
IfcRoot
Software IdentityCommon Use Definitions
Revision ControlCommon Use Definitions
IfcObject
Object Occurrence Predefined TypeCommon Use Definitions
IfcControl
IfcWorkControl
IfcWorkSchedule
Property Sets for ObjectsCommon Use Definitions
Document AssociationCommon Use Definitions
Control AssignmentCommon Use Definitions
Object NestingCommon Use Definitions
AggregationCommon Use Definitions
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;

Link to EXPRESS-G diagram EXPRESS-G diagram

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