4. Fundamental concepts and assumptions
4.1 Project
4.1.1 Project Units
4.1.1.1 SI Units
4.1.1.2 Conversion Units
4.1.1.3 Derived Units
4.1.2 Project Representation Context
4.2 Definition
4.2.1 Property Sets
4.2.1.1 Properties on Occurrences
4.2.1.1.1 Properties on Occurences With Type
4.2.2 Quantity Sets
4.2.2.1 Quantities on Occurrences
4.3 Association
4.3.1 Material
4.3.1.1 Material Solid
4.4 Product
4.4.1 Placement
4.4.2 Grid Placement
4.4.3 Geometry
4.4.3.1 Body Geometry
4.4.3.1.1 Body SweptSolid Geometry
4.4.3.1.1.1 Body Profile Extruded Area Solid
4.4.3.1.2 Body Brep Geometry
4.4.3.1.2.1 Body Brep Geometry PolyLoop
4.4.3.1.3 Body AdvancedSweptSolid Geometry
4.4.3.2 Path Geometry
4.4.3.2.1 Polyline Path Geometry
4.4.3.2.2 Simple Path Geometry
4.4.3.2.3 Geometric Curve Set Geometry
4.4.3.3 Footprint Geometry
4.4.3.3.1 Patch Geometry
4.4.3.4 Mapped Geometry
4.5 Composition
4.5.1 Aggregation
4.5.1.1 Element Composition
4.5.1.2 Element Decomposition
4.5.1.3 Spatial Composition
4.5.1.4 Spatial Decomposition
4.5.2 Voiding
4.5.2.1 Feature Substraction
4.6 Connectivity
4.6.1 Spatial Structure
4.6.1.1 Spatial Container
4.6.1.2 Spatial Containment
4.6.2 Realizing Connection
4.6.3 Realizing Connection Singular