IFC 4.3.x development

7.1.3.6 IfcWindowPanelProperties

Change log

IFC4

additions where_rulesApplicableToType
modificationssupertype Changed from IfcPropertySetDefinition to IfcPreDefinedPropertySet

IFC4X1

additionswhere_rulesApplicableToType
deletionswhere_rulesApplicableToType

IFC4X2

additionswhere_rulesApplicableToType
deletionswhere_rulesApplicableToType

IFC4X3_RC3

additionswhere_rulesApplicableToType
deletionswhere_rulesApplicableToType

7.1.3.6.1 Semantic definitions at the entity

A window panel is a casement, that is, a component, fixed or opening, consisting essentially of a frame and the infilling. The infilling of a window panel is normally glazing. The way of operation is defined in the operation type.

The IfcWindowPanelProperties are used to parametrically describe the shape and operation of window panels. The parametric definition can be added solely or additionally to the explicit shape representation of the window.

The IfcWindowType can define windows consisting of more then one panel. In this case, one instance of IfcWindowPanelProperties has to be included for each window panel. The PanelPosition attribute, in conjunction with the IfcWindowType.OperationType attribute, determines to which panel the IfcWindowPanelProperties_apply. The _IfcWindowPanelProperties are included in the list of properties (HasPropertySets) of the IfcWindowStyle. More information about the window panel can be included in the same list of the IfcWindowType using the IfcPropertySet for dynamic extensions.

The IfcWindowPanelProperties does not hold an own geometric representation. However it defines parameter, which can be used to create the shape of the IfcWindowType (which is inserted by the IfcWindow into the spatial context of the project). The parameters at the IfcWindowPanelProperties define a standard window panel. The outer boundary of the lining is determined by the 'Profile' shape representation assigned to the IfcWindow, which inserts the IfcWindowType. It has to take the lining parameter into account as well. The position of the window panel within the overall window is determined by the PanelPosition attribute.

As shown in Figure 1, the panel is applied to the position within the lining as defined by the panel position attribute. The following parameter apply to that panel: FrameDepth, FrameThickness.

"panel 1"

HISTORY  New entity in IFC2.0, it had been renamed from IfcWindowPanel in IFC2x.

IFC4 CHANGE  Supertype changed to new IfcPreDefinedPropertySet.

7.1.3.6.1 Attributes

# Attribute Type Description
IfcRoot
1 GlobalId IfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world.
2 OwnerHistory OPTIONAL IfcOwnerHistory 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.

> IFC4 CHANGE  The attribute has been changed to be OPTIONAL.
3 Name OPTIONAL IfcLabel 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.
4 Description OPTIONAL IfcText Optional description, provided for exchanging informative comments.
IfcPropertyDefinition
HasContext SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions
HasAssociations SET [0:?] OF IfcRelAssociates FOR RelatedObjects Reference to the relationship IfcRelAssociates and thus to those externally defined concepts, like classifications, documents, or library information, which are associated to the property definition.
IfcPropertySetDefinition
DefinesType SET [0:?] OF IfcTypeObject FOR HasPropertySets The type object to which the property set is assigned. The property set acts as a shared property set to all occurrences of the type object.

> NOTE  The relationship between the IfcPropertySetDefinition and the IfcTypeObject is a direct relationship, not utilizing IfcRelDefinesByProperties, for maintaining compatibility with earlier releases of this standard.

> IFC4 CHANGE  The cardinality has been changed from 0:1 to 0:? with upward compatibility for file based exchange.
IsDefinedBy SET [0:?] OF IfcRelDefinesByTemplate FOR RelatedPropertySets Relation to the property set template, via the objectified relationship IfcRelDefinesByTemplate, that, if given, provides the definition template for the property set or quantity set and its properties.

> IFC4 CHANGE  New inverse relationship, change made with upward compatibility for file based exchange.
DefinesOccurrenceSET [0:?] OF IfcRelDefinesByProperties FOR RelatingPropertyDefinitionReference to the relation to one or many object occurrences that are characterized by the property set definition. A single property set can be assigned to multiple object occurrences using the objectified relationship IfcRefDefinesByProperties.

> IFC4 CHANGE Inverse attribute renamed from PropertyDefinitionOf with upward compatibility for file-based exchange.
IfcPreDefinedPropertySet
IfcWindowPanelProperties
5 OperationType IfcWindowPanelOperationEnum Types of window panel operations. Also used to assign standard symbolic presentations according to national building standards.
6 PanelPosition IfcWindowPanelPositionEnum Position of this panel within the overall window style.
7 FrameDepth OPTIONAL IfcPositiveLengthMeasure Depth of panel frame, measured from front face to back face horizontally (i.e. perpendicular to the window (elevation) plane.
8 FrameThickness OPTIONAL IfcPositiveLengthMeasure Width of panel frame, measured from inside of panel (at glazing) to outside of panel (at lining), i.e. parallel to the window (elevation) plane.
9 ShapeAspectStyle OPTIONAL IfcShapeAspect Optional link to a shape aspect definition, which points to the part of the geometric representation of the window style, which is used to represent the panel.

> DEPRECATION  The attribute is deprecated and shall no longer be used, i.e. the value shall be NIL ($).

7.1.3.6.2 Entity inheritance

dot_inheritance IfcWindowPanelProperties IfcWindowPanelProperties IfcPreDefinedPropertySet IfcPreDefinedPropertySet IfcWindowPanelProperties->IfcPreDefinedPropertySet IfcPreDefinedPropertySet_children 5 more... IfcPreDefinedPropertySet_children->IfcPreDefinedPropertySet IfcPropertySetDefinition IfcPropertySetDefinition IfcPreDefinedPropertySet->IfcPropertySetDefinition IfcPropertySet IfcPropertySet IfcPropertySet->IfcPropertySetDefinition IfcPropertyDefinition IfcPropertyDefinition IfcPropertySetDefinition->IfcPropertyDefinition IfcQuantitySet IfcQuantitySet IfcQuantitySet->IfcPropertySetDefinition IfcPropertyTemplateDefinition IfcPropertyTemplateDefinition IfcPropertyTemplateDefinition->IfcPropertyDefinition IfcRoot IfcRoot IfcPropertyDefinition->IfcRoot IfcObjectDefinition IfcObjectDefinition IfcObjectDefinition->IfcRoot IfcRelationship IfcRelationship IfcRelationship->IfcRoot

7.1.3.6.3 Definitions applying to General Usage

7.1.3.6.3.1 Identity

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

7.1.3.6.3.2 Revision Control

Ownership, history, and merge state is captured using IfcOwnerHistory.

7.1.3.6.4 Formal representations

ENTITY IfcWindowPanelProperties
 SUBTYPE OF (IfcPreDefinedPropertySet);
	OperationType : IfcWindowPanelOperationEnum;
	PanelPosition : IfcWindowPanelPositionEnum;
	FrameDepth : OPTIONAL IfcPositiveLengthMeasure;
	FrameThickness : OPTIONAL IfcPositiveLengthMeasure;
	ShapeAspectStyle : OPTIONAL IfcShapeAspect;
 WHERE
	ApplicableToType : (EXISTS(SELF\IfcPropertySetDefinition.DefinesType[1])) 
AND 
(
 ('IFC4X3_DEV_a1492713.IFCWINDOWTYPE' IN TYPEOF(SELF\IfcPropertySetDefinition.DefinesType[1]))
  OR
 ('IFC4X3_DEV_a1492713.IFCWINDOWSTYLE' IN TYPEOF(SELF\IfcPropertySetDefinition.DefinesType[1]))
);
END_ENTITY;