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The SEDRIS Data Representation Model
APPENDIX A - Classes Geometry Topology Hierarchy |
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An instance of this DRM class is 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> instance.
See individual subclasses for examples.
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 Representation>, have at least one containing object.
We require the ability to spatially organize the topology of every "topological surface". A "topological surface" is not necessarily "rooted at" an <Environment Root> instance or a <Model> instance. In general, many different "topological surfaces" may exist within a <Environment Root> instance or a <Model> instance.
The geometry_topology_level field specifies the level of geometry topology that is present within the hierarchy represented by the <Geometry Topology Hierarchy> instance.
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