Class

• <DRM Property Description>

Superclass

• <DRM Property>

Subclass

• None.

Definition

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

Class diagram

Figure 6.221 — DRM_Property_Description

Constraints

• Property Characteristic restrictions
• Property meaning restrictions
• 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.

  

  Figure 6.222 — <DRM Property Description> 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 specify dewpoint temperature. For all the <DRM Primitive Feature> instances in this aggregate, the dewpoint temperature is specified at a height of ten metres above the surface of the terrain, and is of good quality.

  

  Figure 6.223 — <DRM Property Description> example

  Since the  <DRM Property Value> instance of the <DRM Point Feature> instance 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, and
  2. The measurement is of good quality.