Abstract Class Name: Feature Edge Terminal Node

Superclass - SEDRIS Abstract Base

Subclasses

• Feature Edge Starting Node
• Feature Edge Ending Node

Definition

The one-directional topological relationship between a Feature Edge and the Feature Node that defines its starting or ending Location.

Primary Page in DRM Diagram:

• 12

Example

1. A Feature Edge that represents the centerline of a section of road must have a Feature Edge Starting Node component, which is the Feature Node that defines the Location where the road section begins, and a Feature Edge Ending Node that defines the Location where the road section ends.

                       <Feature Edge>
                             <>
              ---------------------------------
              |                               |
              |                               |
       <Feature Edge Starting Node>    <Feature Edge Ending Node>
             <>                              <>
              |                               |
              |                               |
       <Feature Node>                  <Feature Node>
   

FAQs

When are Feature Edge Terminal Node objects required?

All Feature Edges are required to have a Feature Edge Starting Node component and a Feature Edge Ending Node component, regardless of the feature topology level.

What is the relationship between the Feature Edge Terminal Node classes and the Connected Feature Edge class?

The Feature Edge Terminal Node classes and the Connected Feature Edge class form the two halves of the bidirectional topological relationship between Feature Edges and Feature Nodes. Whenever a Feature Node appears as the component of a Feature Edge Terminal Node, which is in turn a component of a Feature Edge, that same Feature Edge must be associated with one of the Connected Feature Edge components of that Feature Node, and vice versa.

Constraints

• Connected Edge Restrictions

Composed of (one-way)

• one Feature Node