IfcPlateStandardCase

BACnet MVD

#### IfcPlateStandardCase

Natural language names

| Platte / Paneel - Standard
| Plate Standard Case
| Plaque standard

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcPlateStandardCase |  |  | ADDED |

##### Semantic definitions at the entity

Entity definition

The standard plate, IfcPlateStandardCase, defines a plate with certain constraints for the provision of material usage, parameters and with certain constraints for the geometric representation. The IfcPlateStandardCase handles all cases of plates, that:

- have a reference to the IfcMaterialLayerSetUsage defining the material layers of the plate with thicknesses
- are based on an extrusion of a planar surface as defined by the plate profile
- have a constant thickness along the extrusion direction
- are consistent in using the correct material layer set offset to the base planar surface in regard to the shape representation
- are extruded perpendicular to the plane surface

The definitions of plate openings and niches are the same as given at the supertype IfcPlate. The same agreements to the special types of plates, as defined in the PredefinedType attribute apply as well.

> HISTORY New entity in IFC4.

Formal Propositions

Rule | Description
--- | ---
HasMaterialLayerSetUsage | A valid instance of IfcPlateStandardCase relies on the provision of an IfcMaterialLayerSetUsage.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

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.

X

X

3 | Name | 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. | X | X
4 | Description | IfcText | ? | 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).

> IFC4 CHANGE The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition.

X

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).

> IFC4 CHANGE The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition.

X

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.

> IFC4 CHANGE The inverse attribute datatype has been added.

X

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).

> IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.

X

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).

> IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.

X

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 | X
IfcObject

5

ObjectType

IfcLabel

?

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

IsDeclaredBy

IfcRelDefinesByObject
@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.

> IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange.

X

X

Declares

IfcRelDefinesByObject
@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.

> IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange.

X

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.

> IFC4 CHANGE New inverse relationship, the link to IfcRelDefinesByType had previously be included in the inverse relationship IfcRelDefines. Change made with upward compatibility for file based exchange.

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.

> IFC4 CHANGE The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange.

X

IfcProduct
6 | ObjectPlacement | IfcObjectPlacement | ? | Placement of the product in space, the placement can either be absolute (relative to the world coordinate system), relative (relative to the object placement of another product), or constraint (e.g. relative to grid axes). It is determined by the various subtypes of IfcObjectPlacement, which includes the axis placement information to determine the transformation for the object coordinate system. | X | X
7 | Representation | IfcProductRepresentation | ? | Reference to the representations of the product, being either a representation (IfcProductRepresentation) or as a special case a shape representations (IfcProductDefinitionShape). The product definition shape provides for multiple geometric representations of the shape property of the object within the same object coordinate system, defined by the object placement. | X | X
| ReferencedBy | IfcRelAssignsToProduct @RelatingProduct | S[0:?] | Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product. |  | X
IfcElement
8 | Tag | IfcIdentifier | ? | The tag (or label) identifier at the particular instance of a product, e.g. the serial number, or the position number. It is the identifier at the occurrence level. |  | X
| FillsVoids | IfcRelFillsElement @RelatedBuildingElement | S[0:1] | Reference to the IfcRelFillsElement Relationship that puts the element as a filling into the opening created within another element. |  | X
| ConnectedTo | IfcRelConnectsElements @RelatingElement | S[0:?] | Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to. | X | X

IsInterferedByElements

IfcRelInterferesElements
@RelatedElement

S[0:?]

Reference to the interference relationship to indicate the element that is interfered. The relationship, if provided, indicates that this element has an interference with one or many other elements.

> NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements.

> IFC4 CHANGE New inverse relationship.

X

X

InterferesElements

IfcRelInterferesElements
@RelatingElement

S[0:?]

Reference to the interference relationship to indicate the element that interferes. The relationship, if provided, indicates that this element has an interference with one or many other elements.

> NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements.

> IFC4 CHANGE New inverse relationship.

X

| HasProjections | IfcRelProjectsElement @RelatingElement | S[0:?] | Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement. | X | X

ReferencedInStructures

IfcRelReferencedInSpatialStructure
@RelatedElements

S[0:?]

Reference relationship to the spatial structure element, to which the element is additionally associated. This relationship may not be hierarchical, an element may be referenced by zero, one or many spatial structure elements.

> IFC2x3 CHANGE The inverse attribute has been added with upward compatibility for file based exchange.

X

| HasOpenings | IfcRelVoidsElement @RelatingBuildingElement | S[0:?] | Reference to the IfcRelVoidsElement relationship that creates an opening in an element. An element can incorporate zero-to-many openings. For each opening, that voids the element, a new relationship IfcRelVoidsElement is generated. |  | X
| IsConnectionRealization | IfcRelConnectsWithRealizingElements @RealizingElements | S[0:?] | Reference to the connection relationship with realizing element. The relationship, if provided, assigns this element as the realizing element to the connection, which provides the physical manifestation of the connection relationship. |  | X
| ProvidesBoundaries | IfcRelSpaceBoundary @RelatedBuildingElement | S[0:?] | Reference to space boundaries by virtue of the objectified relationship IfcRelSpaceBoundary. It defines the concept of an element bounding spaces. |  | X
| ConnectedFrom | IfcRelConnectsElements @RelatedElement | S[0:?] | Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element. | X | X
| ContainedInStructure | IfcRelContainedInSpatialStructure @RelatedElements | S[0:1] | Containment relationship to the spatial structure element, to which the element is primarily associated. This containment relationship has to be hierachical, i.e. an element may only be assigned directly to zero or one spatial structure. |  | X
| HasCoverings | IfcRelCoversBldgElements @RelatingBuildingElement | S[0:?] | Reference to IfcCovering by virtue of the objectified relationship IfcRelCoversBldgElement. It defines the concept of an element having coverings associated. |  | X
IfcBuildingElement
IfcPlate

9

PredefinedType

IfcPlateTypeEnum

?

Predefined generic type for a plate that is specified in an enumeration. There may be a property set given specificly for the predefined types.

> NOTE The PredefinedType shall only be used, if no IfcPlateType is assigned, providing its own IfcPlateType.PredefinedType.

> IFC4 CHANGE The attribute has been added at the end of the entity definition.

X

IfcPlateStandardCase

##### Definitions applying to Design Transfer View

Instance diagram

#####

Concept usage

Material Layer Set Usage

The Material Layer Set Usage concept applies to this entity.

The material of the IfcPlateStandardCase is defined by IfcMaterialLayerSetUsage and attached by the IfcRelAssociatesMaterial.RelatingMaterial. It is accessible by the inverse HasAssociations relationship. Multi-layer plates can be represented by refering to several IfcMaterialLayer's within the IfcMaterialLayerSet that is referenced from the IfcMaterialLayerSetUsage.

Material information can also be given at the IfcPlateType, defining the common attribute data for all occurrences of the same type. It is then accessible by the inverse IsDefinedBy relationship pointing to IfcPlateType.HasAssociations and via IfcRelAssociatesMaterial.RelatingMaterial.

The IfcPlateStandardCase defines in addition that the IfcPlateType should have a unique IfcMaterialLayerSet, that is referenced by the IfcMaterialLayerSetUsage assigned to all occurrences of this IfcPlateType.

Figure 217 illustrates assignment of IfcMaterialLayerSetUsage and IfcMaterialLayerSet to the IfcPlateStandardCase as the plate occurrence and to the IfcPlateType. The same IfcMaterialLayerSet shall be shared by many occurrences of IfcMaterialLayerSetUsage. This relationship shall be consistent to the relationship between the IfcPlateType and the IfcPlateStandardCase.

Figure 217 — Plate type definition

As shown in Figure 106, the following conventions shall be met:

- The reference coordinate system is the coordinate system established by the IfcExtrudedAreaSolid.Position.
- The reference plane is the plane defined by the extruded profile of IfcExtrudedAreaSolid.SweptSolid. The IfcMaterialLayerSetUsage.OffsetFromReferenceLine is given as a distance from this plane.
- The IfcMaterialLayerSetUsage.DirectionSense defines how the IfcMaterialLayer's are assigned to the reference plane. POSITIVE means in direction to the positive z-axis of the reference coordinate system.
- The IfcMaterialLayerSetUsage.OffsetFromReferenceLine is the distance parallel to the reference plane and always perpendicular to the base (XY) plane of the reference coordinate system. This is independent of a potential non-perpendicular extrusion given by IfcExtrudedAreaSolid.ExtrudedDirection <> 0.,0.,1. A positive value of IfcMaterialLayerSetUsage.OffsetFromReferenceLine would then point into the positive z-axis of the reference coordinate system.
- The Thickness of each IfcMaterialLayer shall be the parallel distance (measured perpendicular to the base plane). The TotalThickness of the IfcMaterialLayerSet is the sum of all layer thicknesses and in case of a perpendicular extrusion identical with IfcExtrudedAreaSolid.Depth
- The IfcMaterialLayerSetUsage.LayerSetDirection i always AXIS3.

Figure 218 — Plate material layers

Body SweptSolid Geometry

The Body SweptSolid Geometry concept template applies to this entity as shown in Table 14.

Identifier | Type | Geometry
--- | --- | ---
Body | SweptSolid |

Table 14 — IfcPlateStandardCase Body SweptSolid Geometry

The following additional constraints apply to the swept solid representation:

- Solid: IfcExtrudedAreaSolid is required,
- Profile: IfcArbitraryClosedProfileDef, IfcRectangleProfileDef, IfcRoundedRectangleProfileDef, IfcCircleProfileDef, IfcEllipseProfileDef shall be supported.
- Extrusion: The profile can be extruded perpendicularly or non-perpendicularly to the plane of the swept profile.
- Material: The definition of the IfcMaterialLayerSetUsage, particularly of the OffsetFromReferenceLine and the ForLayerSet.TotalThickness, has to be consistent to the 'SweptSolid' representation.

> EXAMPLE Figure 218 illustrates a 'SweptSolid' geometric representation. The following interpretation of dimension parameter applies for polygonal plates (in ground floor view): IfcArbitraryClosedProfileDef.OuterCurve being a closed bounded curve is interpreted as area (or foot print) of the plate.

Figure 218 — Plate body extrusion |

Body Clipping Geometry

The Body Clipping Geometry concept template applies to this entity as shown in Table 15.

Identifier | Type | Items
--- | --- | ---
Body | Clipping | IfcBooleanClippingResult

Table 15 — IfcPlateStandardCase Body Clipping Geometry

The following constraints apply to the 'Clipping' representation:

- Solid: see 'SweptSolid' shape representation,
- Profile: see 'SweptSolid' shape representation,
- Extrusion: see 'SweptSolid' shape representation,
- Material: see 'SweptSolid' shape representation,
- Boolean result: The IfcBooleanClippingResult shall be supported, allowing for Boolean differences between the swept solid (here IfcExtrudedAreaSolid) and one or several IfcHalfSpaceSolid.

> EXAMPLE Figure 219 illustrates a 'Clipping' geometric representation with definition of a plate using advanced geometric representation. The profile is extruded non-perpendicular and the plate body is clipped at the eave.

Figure 219 — Plate body clipping |

Mapped Geometry

The Mapped Geometry concept (defined at a supertype) does NOT apply to this entity.

Body SweptSolid PolyCurve Geometry

The Body SweptSolid PolyCurve Geometry concept (defined at a supertype) does NOT apply to this entity.

Body Tessellation Geometry

The Body Tessellation Geometry concept (defined at a supertype) does NOT apply to this entity.

Body CSG Geometry

The Body CSG Geometry concept (defined at a supertype) does NOT apply to this entity.

Body SurfaceModel Geometry

The Body SurfaceModel Geometry concept (defined at a supertype) does NOT apply to this entity.

Material Layer Set

The Material Layer Set concept (defined at a supertype) does NOT apply to this entity.

Material Single

The Material Single concept (defined at a supertype) does NOT apply to this entity.

Body AdvancedBrep Geometry

The Body AdvancedBrep Geometry concept (defined at a supertype) does NOT apply to this entity.

Body Brep Geometry

The Body Brep Geometry concept (defined at a supertype) does NOT apply to this entity.

mvdXML Specification
`<?xml version="1.0"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="b83d03ba-acab-4dbd-af98-ddac3db8a197" name="IfcPlateStandardCase" status="sample" applicableRootEntity="IfcPlateStandardCase">
<Concepts>
<Concept uuid="762d4deb-9d83-443e-87fe-ab206fa5fe7c" name="Material Layer Set Usage" status="sample" override="false">
<Template ref="6d5fb86f-3f2d-49fb-9528-077855ddcc47" />
<Requirements>
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="c498680d-cc8b-4032-a9f3-cc6b2f096f42" />
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="c498680d-cc8b-4032-a9f3-cc6b2f096f42" />
</Requirements>
</Concept>
<Concept uuid="e0569a83-7996-4a08-9ff0-08815329e52d" name="Body SweptSolid Geometry" status="sample" override="false">
<Template ref="cb7c18fa-cf83-4db1-be1b-c013ba4ed672" />
<TemplateRules operator="and">
<TemplateRule Parameters="Identifier[Value]='Body' AND Type[Value]='SweptSolid'" />
</TemplateRules>
</Concept>
<Concept uuid="dce3a2a0-5086-4827-9462-ff826158dc59" name="Body Clipping Geometry" status="sample" override="false">
<Template ref="2cdbc2f5-9b0c-43ea-9d2a-9d72d0147e00" />
</Concept>
<Concept uuid="329b769c-ae1f-4a35-8e83-a6292ca1b02d" name="Mapped Geometry" status="sample" override="false">
<Template ref="ecfdd7c8-71d5-449f-bf20-e63a25dcb9ba" />
</Concept>
<Concept uuid="a2c78c3b-0c0b-4f75-bbf5-4e2feaea178d" name="Body SweptSolid PolyCurve Geometry" status="sample" override="false">
<Template ref="38710ccd-8ff5-41ba-8fda-08300907a02e" />
</Concept>
<Concept uuid="0c6c780e-1b39-4c4e-ac1e-9c0e201acbfa" name="Body Tessellation Geometry" status="sample" override="false">
<Template ref="5cfd4403-6545-4c6d-bc27-0a95a3d09950" />
</Concept>
<Concept uuid="d5076ed5-0abe-4e97-ac60-95857b1485c2" name="Body CSG Geometry" status="sample" override="false">
<Template ref="a0ab7630-6965-495e-be8f-d106fd2599c2" />
</Concept>
<Concept uuid="4b05d5ee-c298-47ca-a28a-7ae24f301b7f" name="Body SurfaceModel Geometry" status="sample" override="false">
<Template ref="17d34a12-9403-40f4-bf82-65399be23c55" />
</Concept>
<Concept uuid="1c984871-a400-4a31-a7b0-44011c48cd8e" name="Material Layer Set" status="sample" override="false">
<Template ref="dfb5b3a9-50e3-46e2-8518-1f03e7cfd886" />
</Concept>
<Concept uuid="c0f3e562-8f17-476d-ad43-e1af571c6cbb" name="Material Single" status="sample" override="false">
<Template ref="5f39a814-44a0-4fb3-8dc6-ddaa0560fc54" />
</Concept>
<Concept uuid="2ab5f29e-9b80-4b05-9c7c-161cd503b188" name="Body AdvancedBrep Geometry" status="sample" override="false">
<Template ref="fc763575-50f1-4bc0-bbf2-382380152047" />
</Concept>
<Concept uuid="ff08071f-ae7b-4965-bb87-8a3e81f78ecc" name="Body Brep Geometry" status="sample" override="false">
<Template ref="8fb923f5-b82d-48d2-ad29-d678ca473fda" />
</Concept>
</Concepts>
</ConceptRoot>
`
Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View
IfcElement
| Product Grid Placement | Product Grid Placement | Design Transfer View
| Body SurfaceModel Geometry (suppressed) | Body SurfaceModel Geometry | Design Transfer View
| Body CSG Geometry (suppressed) | Body CSG Geometry | Design Transfer View
| Body Brep Geometry (suppressed) | Body Brep Geometry | Design Transfer View
| Body AdvancedBrep Geometry (suppressed) | Body AdvancedBrep Geometry | Design Transfer View
| Element Projecting | Element Projecting | Design Transfer View
| Element Interference | Element Interference | Design Transfer View
IfcPlateStandardCase
| Material Layer Set Usage | Material Layer Set Usage | Design Transfer View
| Body SweptSolid Geometry | Body SweptSolid Geometry | Design Transfer View
| Body Clipping Geometry | Body Clipping Geometry | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View
IfcElement
| Product Grid Placement | Product Grid Placement | Design Transfer View
| Body SurfaceModel Geometry (suppressed) | Body SurfaceModel Geometry | Design Transfer View
| Body CSG Geometry (suppressed) | Body CSG Geometry | Design Transfer View
| Body Brep Geometry (suppressed) | Body Brep Geometry | Design Transfer View
| Body AdvancedBrep Geometry (suppressed) | Body AdvancedBrep Geometry | Design Transfer View
| Element Projecting | Element Projecting | Design Transfer View
| Element Interference | Element Interference | Design Transfer View
IfcPlateStandardCase
| Material Layer Set Usage | Material Layer Set Usage | Design Transfer View
| Body SweptSolid Geometry | Body SweptSolid Geometry | Design Transfer View
| Body Clipping Geometry | Body Clipping Geometry | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcPlateStandardCase" type="ifc:IfcPlateStandardCase" substitutionGroup="ifc:IfcPlate" nillable="true"/>
<xs:complexType name="IfcPlateStandardCase">
<xs:complexContent>
<xs:extension base="ifc:IfcPlate"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcPlateStandardCase
SUBTYPE OF (IfcPlate);
WHERE
HasMaterialLayerSetUsage : SIZEOF (QUERY(temp <* USEDIN(SELF, 'IFCKERNEL.IfcRelAssociates.RELATEDOBJECTS') |
('IFCPRODUCTEXTENSION.IfcRelAssociatesMaterial' IN TYPEOF(temp)) AND
('IFCMATERIALRESOURCE.IfcMaterialLayerSetUsage' IN TYPEOF(temp.RelatingMaterial))
)) = 1;
END_ENTITY;

EXPRESS-G diagram

`

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