The SEDRIS Data Representation Model
APPENDIX A - Classes
Property Set Table Library

Class Name: Property Set Table Library

Superclass - <Library>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class is a <Library> instance of <Property Set Table Group> instances.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. Consider a transmittal containing large stretches of various types of terrain, represented with texture-mapped <Polygon> instances, where the textures are blended with <Colour> instances. For efficiency, the source of this transmittal uses a library of terrain textures, which are repeated at intervals across the terrain. Consequently, a limited number of <Image Mapping Function> instance, <Colour> instance pairs are repeated across a large number of <Polygon> instances as components.

    Rather than creating many duplicate DRM objects, the data provider creates a <Property Set Table Library> instance. Each of the <Image Mapping Function> instance, <Colour> instance pairs is placed in a <Property Set> instance, which is in turn stored in the primary <Property Set Table> component of a <Property Set Table Group> component within the library.

    Each <Polygon> instance is then given a <Property Set Index> component, which is associated to the appropriate <Property Set Table Group> instance.

FAQs

No FAQs supplied.

Constraints

Composed of (two-way)

Composed of (two-way metadata) (inherited)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.
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Last updated: July 26, 2006 Copyright © 2006 SEDRIS