The SEDRIS Data Representation Model
APPENDIX A - Classes
Universal Feature Face
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Class Name: Universal Feature Face
Subclasses
This DRM class is concrete and has no subclasses.
Definition
An instance of this DRM class is a <Feature Face>
that represents the infinite area "outside" an explicitly
defined topological surface. A
<Universal Feature Face>
has no explicitly defined outer boundary, but will have at least one
explicit inner boundary.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
This class appears on only one page of the DRM class diagram.
Example
- A topological surface represents the terrain surface over a one degree
square area. The <Universal Feature
Face> instance within this topological
surface represents the infinite area outside of this one degree square.
FAQs
- When is a <Universal Feature Face>
instance required?
- At feature topology level 3, a single
<Universal Feature Face> instance is
required within each separate topological surface, in order to fulfill
the requirement for an exclusive and exhaustive partitioning of the
topological surface. <Universal Feature
Faces> are not used at any other
feature topology level, and are not normally associated with an
<Areal Feature>.
Constraints
Associated by (one-way)(inherited)
Associated with (two-way)(inherited)
Composed of (two-way)(inherited)
Component of (two-way)(inherited)
Inherited Field Elements
This class has no inherited field elements.
Notes
Associated with Notes
The <Feature Edges> that border this <Feature Face>;
the converse of this relationship is that between
<Feature Face Ring> and <Feature Edge>.
The <Feature Nodes> contained within the <Feature Face>,
if any.
Prev: Union Of Primitive Geometry.
Next: UPS Location 2D.
Up:Index.
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Last updated: October 1, 2002
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Copyright © 2002 SEDRIS™
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