Table 6.211—DRM_Property_Description

Property

Description

Superclass

·         <DRM Property>

Class

·         <DRM Property Description>

Subclass

·         none

Definition

An object of this DRM class elaborates a property attribute of an <DRM Aggregate Geometry> or <DRM Aggregate Geometry> object and/or its component inheritance subtree by attaching <DRM Property Characteristic> components and/or qualifying (limiting) <DRM Property Value> components which meaningfully qualify the attribute identified by the <DRM Property Description>.

Example(s)

·         Consider a <DRM Union Of Primitive Geometry> containing <DRM Polygon>, each of which has an emissivity applicable to the IR band only, where valid values are less than or equal to 1.0.

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

·         Consider a <DRM Union Of Features> containing various <DRM Primitive Feature>s that specify dewpoint temperature. For all the <DRM Primitive Feature>s in this aggregate, the dewpoint temperature given was taken at a height of 10 meters above the surface of the terrain, and is of good quality.

Since the <DRM Property Value> of the <DRM Point Feature> describes EAC_DEWPOINT_TEMPERATURE, it inherits the following qualifiers:

a. The dew point temperature measurement was taken at a height of 10 m above the surface, and

b. The measurement is of good quality.

Inherited field elements

field_name

range

Field_Data_Type

meaning1

 

Element_Type

value_unit2

 

EDCS_Unit_Code

value_scale3

 

EDCS_Scale_Code

Field elements

field_name

range

Field_Data_Type

none

 

 

Associated to (one-way) (inherited)

·         none

Associated to (one-way)

·         none

Associated by (one-way) (inherited)

·         none

Associated by (one-way)

·         none

Associated with (two-way) (inherited)

·         none

Associated with (two-way)

·         none

Composed of (two-way) (inherited)

·         zero or more <DRM Property Characteristic>s

Composed of (two-way)

·         zero or more <DRM Property Value>s

Composed of (two-way metadata) (inherited)

·         none

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         none

Component of (two-way)

·         zero or more <DRM Aggregate Feature>s

·         zero or more <DRM Aggregate Geometry>s

·         zero or more <DRM EDCS Use Summary Item>s

Constraints

·         Index codes within tables

Notes

1 Specifies the meaning of the <DRM Property>.

2 Specifies the unit of measurement of the <DRM Property>.

3 Specifies the scale applicable to value_unit.

Class diagram

<DRM Property Description>