The SEDRIS Data Representation Model
APPENDIX A - Classes
Surface Geometry

Abstract Class Name: Surface Geometry

Superclass - <Primitive Geometry>

Subclasses

Definition

An instance of this DRM class is used to represent a geometric surface.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. The terrain skin within a given area can be specified as a collection of <Polygon> instances.

Constraints

Composed of (two-way) (inherited)

Composed of (two-way metadata) (inherited)

Component of (two-way) (inherited)

Inherited Field Elements

This class has no inherited field elements.

Notes

Composed of Notes


Union_Of_Primitive_Geometry

A <Primitive Geometry> instance P has a <Union Of Primitive Geometry> component only when P can be decomposed into nested <Primitive Geometry> instances.

EXAMPLE  A <Polygon> instance can be decomposed into multiple <Polygon> instances representing subfaces.


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Last updated: July 26, 2006 Copyright © 2006 SEDRIS