The DRM is Composed of ...

• Organizer and container classes

  • Classes used to organize other classes
  • Examples
    • <Transmittal Root>, <Library>, <Environment Root>, <Feature Hierarchy>, <Geometry Hierarchy>

• Primitive representation element classes

  • Geometry classes
    • Physical/surface representations of real world objects (is: 3D polygons, images, lighting, etc.)
  • Feature classes
    • Higher level abstraction of real world objects (ie: area, line, and point representations)
  • Topology
    • Concise, mathematical definition of inter-Feature or inter-Geometry object relationships

• Properties

  • Classes which describe the representation elements in a transmittal
  • Examples
    • <Classification Data>, <Property Value>, <Colour>, & metadata classes

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