7.1.3.4 IfcWindowLiningProperties
7.1.3.4.1 Semantic definition
The window lining is the outer frame which enables the window to be fixed in position. The window lining is used to hold the window panels or other casements. The parameter of the IfcWindowLiningProperties define the geometrically relevant parameter of the lining.
The IfcWindowLiningProperties are included in the set of properties of IfcWindowType.HasPropertySets. More information about the window lining can be included in the same set of the IfcWindowType using another IfcPropertySet for dynamic extensions.
The IfcWindowLiningProperties does not hold a geometric representation. However it defines parameters which can be used to create the shape of the window type(which is inserted by the IfcWindow into the spatial context of the project) as shown in Figure 7.1.3.4.F. The parameters at the IfcWindowLiningProperties define a standard window lining, including (if given) a mullion and a transom (for horizontal and vertical splits). The outer boundary of the lining is determined by the 'Profile' shape representation assigned to the IfcWindow, which inserts the IfcWindowType.
7.1.3.4.2 Entity inheritance
7.1.3.4.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcRoot (4) | |||
| 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, |
| 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 (2) | |||
| HasContext | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions |
No description available. |
|
| 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 (3) | |||
| 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. |
|
| 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. |
|
| DefinesOccurrence | SET [0:?] OF IfcRelDefinesByProperties FOR RelatingPropertyDefinition |
Reference 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. |
|
| Click to show 9 hidden inherited attributes Click to hide 9 inherited attributes | |||
| IfcWindowLiningProperties (12) | |||
| 5 | LiningDepth | OPTIONAL IfcPositiveLengthMeasure |
Depth of the window lining (dimension measured perpendicular to window elevation plane). |
| 6 | LiningThickness | OPTIONAL IfcNonNegativeLengthMeasure |
Thickness of the window lining as explained in the figure above. If LiningThickness value is 0. (zero) it denotes a window without a lining (all other lining parameters shall be set to NIL in this case). If the LiningThickness is NIL it denotes that the value is not available. |
| 7 | TransomThickness | OPTIONAL IfcNonNegativeLengthMeasure |
Thickness of the transom (horizontal separator of window panels within a window), measured parallel to the window elevation plane. The transom is part of the lining and the transom depth is assumed to be identical to the lining depth. If the TransomThickness is set to zero (and the TransomOffset set to a positive length), then the window is divided vertically without a physical divider. |
| 8 | MullionThickness | OPTIONAL IfcNonNegativeLengthMeasure |
Thickness of the mullion (vertical separator of window panels within a window), measured parallel to the window elevation plane. The mullion is part of the lining and the mullion depth is assumed to be identical to the lining depth. If the MullionThickness is set to zero (and the MullionOffset set to a positive length), then the window is divided horizontally without a physical divider. |
| 9 | FirstTransomOffset | OPTIONAL IfcNormalisedRatioMeasure |
Offset of the transom centerline, measured along the z-axis of the window placement co-ordinate system. An offset value = 0.5 indicates that the transom is positioned in the middle of the window. |
| 10 | SecondTransomOffset | OPTIONAL IfcNormalisedRatioMeasure |
Offset of the transom centerline for the second transom, measured along the x-axis of the window placement co-ordinate system. An offset value = 0.666 indicates that the second transom is positioned at two/third of the window. |
| 11 | FirstMullionOffset | OPTIONAL IfcNormalisedRatioMeasure |
Offset of the mullion centerline, measured along the x-axis of the window placement co-ordinate system. An offset value = 0.5 indicates that the mullion is positioned in the middle of the window. |
| 12 | SecondMullionOffset | OPTIONAL IfcNormalisedRatioMeasure |
Offset of the mullion centerline for the second mullion, measured along the x-axis of the window placement co-ordinate system. An offset value = 0.666 indicates that the second mullion is positioned at two/third of the window. |
| 13 | 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 lining. |
| 14 | LiningOffset | OPTIONAL IfcLengthMeasure |
Offset of the window lining. The offset is given as distance along the y axis of the local placement (perpendicular to the window plane). |
| 15 | LiningToPanelOffsetX | OPTIONAL IfcLengthMeasure |
Offset between the lining and the window panel measured along the x-axis of the local placement. Should be smaller or equal to the LiningThickness. |
| 16 | LiningToPanelOffsetY | OPTIONAL IfcLengthMeasure |
Offset between the lining and the window panel measured along the y-axis of the local placement. Should be smaller or equal to the IfcWindowPanelProperties.PanelThickness. |
7.1.3.4.4 Formal propositions
| Name | Description |
|---|---|
| WR31 |
Either both parameter, LiningDepth and LiningThickness are given, or only the LiningThickness, then the LiningDepth is variable. It is not valid to only assert the LiningDepth. |
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| WR32 |
Either both parameter, FirstTransomOffset and SecondTransomOffset are given, or only the FirstTransomOffset, or none of both. It is not valid to only assert the SecondTransomOffset. |
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| WR33 |
Either both parameter, FirstMullionOffset and SecondMullionOffset are given, or only the FirstMullionOffset, or none of both. It is not valid to only assert the SecondMullionOffset. |
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| WR34 |
The IfcWindowPanelProperties shall only be used in the context of an IfcDoorType. |
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7.1.3.4.5 Concept usage
| Concept | Usage | Description | |
|---|---|---|---|
| IfcRoot (2) | |||
| Revision Control | General |
Ownership, history, and merge state is captured using IfcOwnerHistory. |
|
| Software Identity | General |
IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept. |
|
| Click to show 2 hidden inherited concepts Click to hide 2 inherited concepts | |||
7.1.3.4.6 Formal representation
ENTITY IfcWindowLiningProperties
SUBTYPE OF (IfcPreDefinedPropertySet);
LiningDepth : OPTIONAL IfcPositiveLengthMeasure;
LiningThickness : OPTIONAL IfcNonNegativeLengthMeasure;
TransomThickness : OPTIONAL IfcNonNegativeLengthMeasure;
MullionThickness : OPTIONAL IfcNonNegativeLengthMeasure;
FirstTransomOffset : OPTIONAL IfcNormalisedRatioMeasure;
SecondTransomOffset : OPTIONAL IfcNormalisedRatioMeasure;
FirstMullionOffset : OPTIONAL IfcNormalisedRatioMeasure;
SecondMullionOffset : OPTIONAL IfcNormalisedRatioMeasure;
ShapeAspectStyle : OPTIONAL IfcShapeAspect;
LiningOffset : OPTIONAL IfcLengthMeasure;
LiningToPanelOffsetX : OPTIONAL IfcLengthMeasure;
LiningToPanelOffsetY : OPTIONAL IfcLengthMeasure;
WHERE
WR31 : NOT(EXISTS(LiningDepth) AND NOT(EXISTS(LiningThickness)));
WR32 : NOT(NOT(EXISTS(FirstTransomOffset)) AND EXISTS(SecondTransomOffset));
WR33 : NOT(NOT(EXISTS(FirstMullionOffset)) AND EXISTS(SecondMullionOffset));
WR34 : (EXISTS(SELF\IfcPropertySetDefinition.DefinesType[1]))
AND
(
('IFC4X3.IFCWINDOWTYPE' IN TYPEOF(SELF\IfcPropertySetDefinition.DefinesType[1]))
OR
('IFC4X3.IFCWINDOWSTYLE' IN TYPEOF(SELF\IfcPropertySetDefinition.DefinesType[1]))
);
END_ENTITY;