Class Name: External Geometry Face Ring

Superclass - Geometry Face Ring

Definition

A topological relationship between a Geometry Face and one or more directed Geometry Edges. A Geometry Face has an external boundary (all Geometry Faces must be bounded). This boundary can be made of a single Geometry Edge with multiple Location 3Ds, or multiple Geometry Edges.

Primary Page in DRM Diagram:

• 13

Example

1. Consider a Geometry Face representing a sinkhole. The outer boundary of the Geometry Face is represented by its External Geometry Face Ring.
2. Consider a Geometry Face representing a lake. The shoreline of the lake is described by the External Geometry Face Ring of the Geometry Face.

FAQs

Constraints

Composed of (one-way)(inherited)

• one or more {ordered} Geometry Edges through Geometry Ring Edge Directions

Component of (one-way)

• one Geometry Face