Class

• <DRM Property Table Reference>

Superclass

• <DRM SEDRIS Abstract Base>

Subclass

• None.

Definition

An instance of this DRM class specifies a reference to an (N-1)-dimensional slice of an N-dimensional <DRM Property Table> component of a <DRM Data Table Library> instance, where N is the number of <DRM Axis> components of the <DRM Property Table> instance.

The <DRM Property Table Reference> class exists primarily to allow a data provider to select a set of parameters from a standard <DRM Property Table> instance containing an indexed collection of alternatives.

Since only one <DRM Axis> instance requires a specific tick mark to be specified, a <DRM Property Table Reference> instance specifies the axis_type of the <DRM Axis> instance to be matched, and the index_on_axis specifies the tick mark on that <DRM Axis> instance.

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

The index_on_axis field specifies the (zero-based) index of the tick mark being referenced on the specified <DRM Axis> instance. This allows the tick mark to be specified in a manner independent of the class of the <DRM Axis> instance. The only restriction is that the value of index_on_axis shall be between zero and axis_value_count-1 for the specified <DRM Axis> instance.

If index_on_axis specifies some value j, the (j+1)^th tick mark on the <DRM Axis> instance is being referenced regardless of the data type of the tick marks specified by the specific subclass of <DRM Axis> being used.

For a <DRM Property Table Reference> instance with a <DRM Property Table Reference Control Link> component X, the value of the index_on_axis field is obtained from X.

Class diagram

Figure 6.245 — DRM_Property_Table_Reference

Constraints

• Characteristics of <DRM Property Table Reference>
• Constraints on associates
• Publishable object

Example(s)

• See the <DRM Property Table Reference Control Link> class, second example.