IFCREPRESENTATIONRESOURCE
The data model consists of the following:
Definition of buildingSMART: This schema defines the representation of
shape and topology as important definitional properties for products defined
within the IFC Object Model. The representations characterize certain
properties of a product, and any product can be defined by zero, one, or many
of those properties. The schema defines two ways to represent definitional
properties of products:
 topological representation
 geometric shape representation
The geometric shape representation allows for
 multiple shape representations for the same product definition shape
of a product
 separate shape representations for components or parts of the product
definition shape by using shape aspects
The following parts of ISO10303, STEP, had been reviewed to provide
input into the specification of the representation resource for the IFC Object
Model:
 Part 41, Integrated Generic Resources – Fundamental of
Product Description and Support product_property_definition_schema
product_property_representation_schema
 Part 42, Integrated Generic Resources – Geometric and
Topological Representation geometry_schema
 Part 43, Integrated Generic Resources – Representation
Structures representation_schema
Please note, that the above listed resources which are defined within
Integrated Resources of STEP had been interpreted to fit into the IFC
architecture.
Interfaced schemas (8):


(

IfcDimensionCount, IfcRepresentationItem, IfcAxis2Placement, IfcDirection, IfcAxis2Placement2D, IfcAxis2Placement3D, IfcSameAxis2Placement, IfcSameCartesianPoint, IfcSameDirection, IfcSameValue, IfcRepresentationMap);



Entities (13):
Enumerations (2):
Global rules (1):
Functions (3):