IfcRelCoversBldgElements

BACnet MVD

#### IfcRelCoversBldgElements

Natural language names

| Ordnet Bekleidung / Belag einem Bauteil zu - Relation
| Rel Covers Bldg Elements

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRelCoversBldgElements |  |  | MOVED | Schema changed from IFCPRODUCTEXTENSION to IFCSHAREDBLDGELEMENTS.
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### Semantic definitions at the entity

Entity definition

The IfcRelCoversBldgElements relationship is an objectified relationship between an element and one to many coverings, which cover that element.

> NOTE The definition of IfcCoverings include both the coverings of building elements, such as flooring or cladding. and the covering of distribution elements, such as wrapping or sleeving.

The IFC specification provides two relationships:

- IfcRelCoversBldgElements to assign coverings to elements.

  > NOTE This relationship is now deprecated and replaced by IfcRelAggregates.

- IfcRelCoversSpaces to assign coverings to spaces

  > NOTE This relationship is now deprecated and replaced by IfcRelContainedInSpatialStructure.

Whether the relationship between the covering and the space, or between the covering and the element, is regarded as primary, has to be determined within the context of a model view definition.

> HISTORY New entity in IFC1.5

> DEPRECATION The relationship IfcRelCoversBldgElements shall not be used anymore, use IfcRelAggregates instead.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
5 | RelatingBuildingElement | IfcElement |  | Relationship to the element that is covered. It includes building elements for coverings such as flooring or cladding, or distribution elements for coverings such as sleeving or wrapping. |  | X
6 | RelatedCoverings | IfcCovering | S[1:?] | Relationship to the set of coverings that are assigned to this element. |  | X

##### 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
IfcRelationship
IfcRelConnects
IfcRelCoversBldgElements
5 | RelatingBuildingElement | IfcElement |  | Relationship to the element that is covered. It includes building elements for coverings such as flooring or cladding, or distribution elements for coverings such as sleeving or wrapping. |  | X
6 | RelatedCoverings | IfcCovering | S[1:?] | Relationship to the set of coverings that are assigned to this element. |  | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcRelCoversBldgElements" type="ifc:IfcRelCoversBldgElements" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>
<xs:complexType name="IfcRelCoversBldgElements">
<xs:complexContent>
<xs:extension base="ifc:IfcRelConnects">
<xs:sequence>
<xs:element name="RelatingBuildingElement" type="ifc:IfcElement" nillable="true"/>
<xs:element name="RelatedCoverings">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcCovering" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcCovering"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcRelCoversBldgElements
SUBTYPE OF (IfcRelConnects);
RelatingBuildingElement : IfcElement;
RelatedCoverings : SET [1:?] OF IfcCovering;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcElement IfcCovering

Link to this page