Geometry Topology Hierarchy

The SEDRIS Data Representation Model APPENDIX A - Classes Geometry Topology Hierarchy

Abstract Class Name: Geometry Topology Hierarchy

A spatially organized hierarchical collection of <Geometry Topology> instances, which includes all of the <Geometry Topology> instances that lie within a defined spatial extent, and are components of a single <Aggregate Geometry>.

This class appears on only one page of the DRM class diagram.

The set of all <Geometry Topology> instances contained within an independent topological surface, organized into a collection of regularly or irregularly shaped tiles.

What is the purpose of this class?: This class allows <Geometry Topology> instances to be spatially organized using different methods. It ensures that all <Geometry Topology> instances, particularly those that are not directly associated with any <Geometry>, have at least one containing object.
Why not restrict <Geometry Topology Hierarchy> to be a component of just <Environment Root> and <Model> - placing Topology as an organizing principle on par with <Geometry> organizations and <Feature> organizations?: We require the ability to spatially organize the topology of every 'topological surface'. A 'topological surface' is not necessarily 'rooted at' a <Environment Root> or a <Model> instance. In general, many different 'topological surfaces' may exist within a <Environment Root> or a <Model>.

None.

This class has no inherited field elements.

SE_Geometry_Topology_Level	geometry_topology_level;

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Last updated: May 15, 2003