The SEDRIS Data Representation Model
APPENDIX A - Classes
Feature Face Ring
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Abstract Class Name: Feature Face Ring
Subclasses
Definition
An instance of this DRM class represents the one-directional
topological relationship from a
<Feature Face> to the ordered collection of
one or more <Feature Edge> instances that
define one of its boundaries (outer or inner).
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
This class appears on only one page of the DRM class diagram.
Example
See <External Feature Face Ring>,
<Internal Feature Face Ring>
for examples.
FAQs
- When are <Feature Face Ring>
instances required?
- All <Feature Face> instances are required to
have at least one <Feature Face Ring>
component, regardless of feature topology level. A
<Regular Feature Face> shall have an
<External Feature Face Ring>, which
defines its outer boundary, and may have any number of
<Internal Feature Face Ring>
components, which define inner boundaries (i.e., "holes")
within the <Feature Face>. A
<Universal Feature Face> has no
<External Feature Face Ring>, but
will have one or more <
Internal Feature Face Rings>.
- Can the same <Feature Edge> appear more
than once in the collection of <Feature Edges>
making up a <Feature Face Ring>?
- Yes. A <Feature Edge> can appear up to
twice in a <Feature Face Ring>, once with
each orientation.
Constraints
Associated to (one-way)
Inherited Field Elements
This class has no inherited field elements.
Prev: Feature Face.
Next: Feature Hierarchy.
Up:Index.
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Last updated: October 1, 2002
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Copyright © 2002 SEDRIS™
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