Class

• <DRM Feature Volume Shell>

Superclass

• <DRM SEDRIS Abstract Base>

Subclass

• None.

Definition

An instance of this DRM class specifies the one-directional topological relationship from a <DRM Feature Volume> instance to the collection of two or more <DRM Feature Face> instances that define one of its boundaries (external or internal).

Class diagram

Figure 6.98 — DRM_Feature_Volume_Shell

Constraints

• Publishable object
• Volume shell face consistency

Example(s)

• Consider a <DRM Volumetric Feature> instance V representing a building. V has:

  1. an associated <DRM Feature Volume> instance that defines its extent, shape, and topological relationships;
  2. a <DRM Classification Data> component that classifies it as an ECC_BUILDING;
  3. <DRM Property Value> components that describe its characteristics, such as material composition; and
  4. a <DRM Label> component that identifies it as “The Empire State Building”.

  The external boundary of the <DRM Feature Volume> instance consists of a single <DRM Feature Volume Shell> instance that is associated with the <DRM Feature Face> instances representing the walls, roof, and (basement) floor of the building.