Class Name: Regular Feature Face

Superclass - <Feature Face>

Subclasses

Definition

An instance of this DRM class is a <Feature Face> instance that has a finite extent and therefore an explicit outer boundary.

Primary Page in DRM Diagram:

• 12

Secondary Pages in DRM Diagram:

Example

1. An <Areal Feature> representing a forest would be defined by one or more <Regular Feature Face> instances.

2. The outer boundary of a <Regular Feature Face> representing a lake is defined by a single <Feature Edge>. This <Feature Edge> will be the sole component of the <External Feature Face Ring> component of the <Regular Feature Face>. Another <Regular Feature Face> represents an island in the lake. Its boundary is also defined by a single <Feature Edge>. This second <Feature Edge> will be the sole component of an <Internal Feature Face Ring> component of the <Regular Feature Face> that represents the lake, and will also be the sole component of the <External Feature Face Ring> of the <Regular Feature Face> that represents the island.

   

FAQs

What distinguishes a <Regular Feature Face>?

A <Regular Feature Face> is the "normal" subclass of <Feature Face>, representing an explicitly defined closed region with a finite area. <Regular Feature Face> instances are used to represent the extents of <Areal Feature> instances.

Constraints

• <<No Attribute Conflicts>>
• <<Contained Node Restrictions>>
• <<Edges Bordering Faces>>
• <<Feature Edge Restrictions>>
• <<Non Crossing Associations>>

Associated by (one-way)(inherited)

• one or more <Feature Edge> instances (notes)

Associated with (two-way)(inherited)

• zero or more <Areal Feature> instances through <Face Directions>
• zero or one <Feature Face> instance
• zero or more <Feature Node> instances (notes)

Composed of (two-way)(inherited)

• zero or one <Feature ID> instance
• zero or more <Property Value> instances
• zero or more <Internal Feature Face Ring> instances
• zero or more <Same As Feature Face> instances

Composed of (two-way)

• one <External Feature Face Ring> instance

Component of (two-way)(inherited)

• zero or more <Union Of Feature Topology> instances

Inherited Field Elements

Notes

Associated with Notes

Feature_Edge

 These <Feature Edge> instances are those that border the
 given <Feature Face> instance. The converse of this
 relationship is that between <Feature Face Ring> and
 <Feature Edge>.

Feature_Node

 If specified, these <Feature Node> instances are contained
 within the <Feature Face>; see this class' constraints for
 further details.