# Representation Items Module

Creates and accesses entities that represent Representation items.

Representation item entities define individual objects that are present in a CAD file, such as a bolt, wheel, or table leg.

Multiple representation items are contained within a part definition, which scales and positions the representation items within a 3D space. The result is a 3D part that can be assembled into higher level product occurrences, such as an engine part, car, or table.

An `A3DRiRepresentationItem`contains a local `A3DRiCoordinateSystem`. The `A3DRiCoordinateSystem`coordinate system is expressed relative to the parent product occurrence’s coordinate system (`A3DAsmProductOccurrence`).

All representation item entities inherit the `A3DRiRepresentationItem`base class.

Topics

- Drawing Block
- Representation Item Base
- Helpers
- Set Representation Item
- PointSet Representation Item
- Direction Representation Item
- Coordinate System Representation Item
- Curve Representation Item
- Plane Representation Item
- BrepModel Representation Item
- PolyBrepModel Representation Item
- PolyWire Representation Item

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