Broad Categories ofClass Functionality

• Organizers and Containers

  • Examples: <Transmittal Root>, <Environment Root>, <Library>, <Feature Hierarchy>, <Geometry Hierarchy>

• Primitives

  • Examples: <Polygon>, <Line>, <Point>, <Sound>, <Image>, <Areal Feature>, <Linear Feature>, <Point Feature>

• Metadata

  • Examples: <Description>, <Keywords>

• Modifiers

  • Examples: <Classification Data>, <Property Value>, <Colour>, <Image Mapping Function>

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