Class

• <DRM Property Description>

Superclass

• <DRM Property>

Subclass

• None.

Definition

An instance of this DRM class is used to elaborate a property of a <DRM Aggregate Geometry> instance or <DRM Aggregate Feature> instance and/or its component inheritance subtree by specifying <DRM Property Characteristic> components and/or qualifying <DRM Property Value> components that meaningfully limit the property identified by the <DRM Property Description> instance.

Class diagram

Figure 6.232 — DRM_Property_Description

Constraints

• <DRM Property Characteristic> constraints
• <DRM Property> constraints
• Publishable object

Example(s)

• Consider a <DRM Union Of Primitive Geometry> instance containing <DRM Polygon> instances, each of which has an emissivity applicable to the infrared band only, where valid values are less than or equal to 1,0, as depicted in Figure 6.233.

  

  Figure 6.233 — <DRM Property Description> infrared emissivity example

  The emissivity of each <DRM Polygon> instance is applicable to the infrared band only, because that property is so qualified by inheritance.

• Consider a <DRM Union Of Features> instance containing various <DRM Primitive Feature> instances that shall specify dewpoint temperature. For all the <DRM Primitive Feature> instances in this aggregate, the dewpoint temperature given was taken at a height of ten metres above the surface of the terrain, and is of good quality, as depicted in Figure 6.234.

  

  Figure 6.234 — <DRM Property Description> dewpoint temperature example

  Since the <DRM Point Feature> instance’s <DRM Property Value> component describes EAC_DEWPOINT_TEMPERATURE, it inherits the following qualifiers:

  1. The EAC_DEWPOINT_TEMPERATURE measurement was taken at a height of ten metres above the surface.
  2. The measurement is of good quality.