Table 6.16 — DRM_Axis

Property

Description

Class
  • <DRM Axis>

Superclass

Subclass

Definition

An instance of a concrete class derived from this DRM class specifies a set of values of an independent variable to be used to organize the dependent values in an instance of <DRM Data Table>.

The axis_type field specifies the property being described by the given <DRM Axis> instance.

The axis_value_count specifies the number of “hash marks” along the given <DRM Axis> instance.

Clarifications

None.

Class diagram

Figure 6.14 — DRM_Axis

Inherited field elements

Field name

Range

Field data type

None

    

Field elements

Field name

Range

Field data type

axis_type

 

EDCS_Attribute_Code

axis_value_count

 

Short_Integer_Positive

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)
  • None.

Composed of (two-way)
  • None.

Composed of (two-way metadata) (inherited)
  • None.

Composed of (two-way metadata)
  • None.

Component of (two-way) (inherited)
  • None.

Component of (two-way)

Constraints

Example(s)

  • A table of Digital Terrain Elevation Data (DTED) contains terrain elevation data sampled in a grid of regularly spaced longitude and latitude points. The <DRM Axis> components of such a table are longitude and latitude.

  • A table of ocean temperature and salinity data taken at varying depths by an expendable bathythermograph can be captured in a table. Such a table would have depth as an <DRM Axis>, and temperature and pressure would be <DRM Table Property Description> components. If these data were taken at intervals along a path, the locations on that path (say longitudes) would form a second <DRM Axis> of the now two-dimensional table.