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  • IfcProduct
    spatial contexts such as grid port annotation structural actions etc HISTORY New Entity in IFC Release 1 0 Use Definition Any instance of IfcProduct defines a particular occurrence of a product the common type information that relates to many similar or identical occurrences of IfcProduct is handled by the IfcTypeProduct and its subtypes assigned to one or many occurrences of IfcProduct by using the objectified relationship IfcRelDefinesByType The IfcTypeProduct may provide in addition to common properties also a common geometric representation for all occurrences An IfcProduct occurs at a specific location in space if it has a geometric representation assigned It can be placed relatively to other products but ultimately relative to the world coordinate system defined for this project The inherited ObjectType attribute can be used to designate a particular type of the product instance If subtypes of IfcProduct have a PredefinedType defined the ObjectType is used to provide the user defined particular type of the product instance if the PredefinedType is set to USERDEFINED EXPRESS specification ENTITY IfcProduct ABSTRACT SUPERTYPE OF IfcProxy SUBTYPE OF IfcObject ObjectPlacement OPTIONAL IfcObjectPlacement Representation OPTIONAL IfcProductRepresentation INVERSE ReferencedBy SET OF IfcRelAssignsToProduct FOR RelatingProduct WHERE WR1 EXISTS Representation AND EXISTS ObjectPlacement OR EXISTS Representation AND NOT IFCREPRESENTATIONRESOURCE IFCPRODUCTDEFINITIONSHAPE IN TYPEOF Representation OR NOT EXISTS Representation END ENTITY Attribute definitions ObjectPlacement 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 Representation Reference to the representations of the product being either a representation IfcProductRepresentation or as a special case a shape representations IfcProductDefinitionShape The product definition

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifckernel/lexical/ifcproduct.htm (2016-02-12)
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  • IfcObjectPlacement
    grid In any case the object placement has to unambiguously define the object coordinate system as either two dimensional axis placement IfcAxis2Placement2D or three dimensional axis placement IfcAxis2Placement3D The axis placement may have to be calculated Informal proposition No two or more elements subtypes of IfcProduct shall share the same instance of IfcObjectPlacement HISTORY New entity in IFC Release 2x EXPRESS specification ENTITY IfcObjectPlacement ABSTRACT SUPERTYPE OF ONEOF IfcGridPlacement IfcLocalPlacement

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcgeometricconstraintresource/lexical/ifcobjectplacement.htm (2016-02-12)
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  • IfcProductRepresentation
    the IFC model HISTORY New entity in IFC Release 2 0 IFC2x Edition 3 NOTE Users should not instantiate the entity IfcProductRepresentation from IFC2x Edition 3 onwards It will be changed into an ABSTRACT supertype in future releases of IFC EXPRESS specification ENTITY IfcProductRepresentation SUPERTYPE OF ONEOF IfcProductDefinitionShape IfcMaterialDefinitionRepresentation Name OPTIONAL IfcLabel Description OPTIONAL IfcText Representations LIST 1 OF IfcRepresentation END ENTITY Attribute definitions Name The word or group of

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcrepresentationresource/lexical/ifcproductrepresentation.htm (2016-02-12)
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  • IfcRelAssignsToProduct
    IFC2x Edition 3 CHANGE The reference of a product within a spatial structure is now handled by a new relationship object IfcRelReferencedInSpatialStructure The IfcRelAssignsToProduct shall not be used to represent this relation from IFC2x3 onwards Context Assignment of a context specific representation such as of structural members to a different context representation with potentially different decomposition breakdown such as of building elements for a specific context specific representation IFC2x Edition 3 CHANGE The relation of a structural member as instance of IfcStructuralMember or its subclasses to a physical element as instance of IfcElement or its subclasses is now handled by a new relationship object IfcRelConnectsStructuralElement The IfcRelAssignsToProduct shall not be used to represent this relation from IFC2x3 onwards View Assignment of a product via RelatingProduct that is decomposed according to a discipline view to another product via RelatedObjects that is decomposed according to a different discipline view An example is the assignment of the architectural slab to a different decomposition of the pre manufactured sections of a slab under a precast concrete discipline view HISTORY New Entity in IFC Release 2x EXPRESS specification ENTITY IfcRelAssignsToProduct SUBTYPE OF IfcRelAssigns RelatingProduct IfcProduct WHERE WR1 SIZEOF QUERY Temp SELF IfcRelAssigns RelatedObjects RelatingProduct Temp

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifckernel/lexical/ifcrelassignstoproduct.htm (2016-02-12)
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  • IfcElementCompositionEnum
    an indication whether the spatial structure element or proxy represents a COMPLEX a group or aggregation of similar elements ELEMENT a undivided element itself PARTIAL a subelement or part HISTORY New enumeration in IFC Release 2 x EXPRESS specification TYPE

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcelementcompositionenum.htm (2016-02-12)
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  • IfcRelReferencedInSpatialStructure
    normally contained within a storey and since it does not span through several stories it is not referenced in any additional storey However a curtain wall might span through several stories in this case it can be contained within the ground floor but it would be referenced by all additional stories it spans Predefined spatial structure elements to which elements can be assigned are site as IfcSite building as IfcBuilding storey as IfcBuildingStorey space as IfcSpace The same element can be assigned to different spatial structure elements depending on the context HISTORY New entity in Release IFC2x Edition 3 Use Definition The figure shows the use of IfcRelContainedInSpatialStructure and IfcRelReferencedInSpatialStructure to assign an IfcCurtainWall to two different levels within the spatial structure It is primarily contained within the ground floor and additionally referenced within the first and second floor EXPRESS specification ENTITY IfcRelReferencedInSpatialStructure SUBTYPE OF IfcRelConnects RelatedElements SET 1 OF IfcProduct RelatingStructure IfcSpatialStructureElement WHERE WR31 SIZEOF QUERY temp RelatedElements IFCPRODUCTEXTENSION IFCSPATIALSTRUCTUREELEMENT IN TYPEOF temp 0 END ENTITY Attribute definitions RelatedElements Set of products which are referenced within this level of the spatial structure hierarchy NOTE Referenced elements are contained elsewhere within the spatial structure they are referenced additionally by this

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcrelreferencedinspatialstructure.htm (2016-02-12)
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  • IfcRelServicesBuildings
    CHANGE The data type of the attribute RelatedBuildings has been changed from IfcBuilding to its supertype IfcSpatialStructureElement with upward compatibility for file based exchange The name IfcRelServicesBuildings is a known anomaly as the relationship is not restricted to buildings anymore EXPRESS specification ENTITY IfcRelServicesBuildings SUBTYPE OF IfcRelConnects RelatingSystem IfcSystem RelatedBuildings SET 1 OF IfcSpatialStructureElement END ENTITY Attribute definitions RelatingSystem System that services the Buildings RelatedBuildings Spatial structure elements including site

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcrelservicesbuildings.htm (2016-02-12)
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  • IfcRelConnects
    however subtypes of the relationship define the applicable object types for the connectivity relationship and the semantics of the particular connectivity HISTORY New entity in IFC Release 2x EXPRESS specification ENTITY IfcRelConnects ABSTRACT SUPERTYPE OF IfcRelSequence SUBTYPE OF IfcRelationship END

    Original URL path: http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifckernel/lexical/ifcrelconnects.htm (2016-02-12)
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