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Definition from buildingSMART: The product type (IfcTypeProduct) defines a list of property set definitions of a product and an optional set of product representations. It is used to define a product specification (i.e. the specific product information, that is common to all occurences of that product type).

NOTE: The product representations are defined as representation maps, which gets assigned by a product instance through the representation item 'IfcMappedItem'.

A product type is used to define the common properties of a certain type or style of an object that may be applied to instances of those products to assign a specific style to them. Product types may be exchanges without being already assigned to products.

HISTORY: New entity in IFC Release 2x.

EXPRESS specification:

ENTITY IfcTypeProduct
SUBTYPE OF ( IfcTypeObject);
RepresentationMaps  :  OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag  :  OPTIONAL IfcLabel;
WR41  :  NOT(EXISTS(SELF\IfcTypeObject.ObjectTypeOf[1])) OR (SIZEOF(QUERY(temp <* SELF\IfcTypeObject.ObjectTypeOf[1].RelatedObjects | NOT('IFCKERNEL.IFCPRODUCT' IN TYPEOF(temp))) ) = 0);

Attribute definitions:

RepresentationMaps  :  List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given.
Tag  :  The tag (or label) identifier at the particular type of a product, e.g. the article number (like the EAN). It is the identifier at the specific level.

Formal Propositions:

WR41  :  The product style, if assigned to an object, shall only be assigned to object of type IfcProduct or IfcProxy.

Inheritance graph

ENTITY IfcTypeProduct;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
HasAssignments  :  SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy  :  SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes  :  SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations  :  SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcTypeObject;
ApplicableOccurrence  :  OPTIONAL IfcLabel;
HasPropertySets  :  OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
ObjectTypeOf  :  SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct;
RepresentationMaps  :  OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag  :  OPTIONAL IfcLabel;