Class Name: Feature Node

Superclass - <Feature Topology>

Subclasses

Definition

An instance of this DRM class is a zero-dimensional <Feature Topology> instance specifying the location of a <Point Feature> instance and/or an endpoint of one or more <Feature Edge> instances.

Primary Page in DRM Diagram:

• 12

Secondary Pages in DRM Diagram:

• 8

Example

1. A single <Feature Node> instance represents the location of a small building.

2. The <Feature Node> instance represents the intersection of two roads.

FAQs

When are <Feature Node> instances required?

<Feature Node> instances are required whenever either <Point Feature> or <Feature Edge> instances are present, regardless of the feature topology level.

Are there any geometric constraints on the <Location> component of a <Feature Node> instance?

Yes. At all feature topology levels greater than zero, different <Feature Node> instances cannot share the same <Location> component.

Constraints

• <<Publishable Object>>
• <<Property Constraints>>
• <<Constraints On Associates>>
• <<Contained Node Constraints>>
• <<Valid Node Edge Relationships>>

Associated with (two-way)

• zero or more <Feature Edge> instances, each through the use of a <Edge Directions> link object (notes)
• zero or one <Feature Face> instance (notes)
• zero or more <Feature Node> instances
• zero or one <Feature Volume> instance (notes)
• zero or more <Point Feature> instances

Composed of (two-way) (inherited)

• zero or more <Property Value> instances

Composed of (two-way)

• one <Location> instance

Component of (two-way) (inherited)

• zero or more <Union Of Feature Topology> instances

Inherited Field Elements

Notes

Associated with Notes

Feature_Edge

Feature_Face

Feature_Volume