The SEDRIS Data Representation Model
APPENDIX A - Classes
CMY Colour Control Link

Class Name: CMY Colour Control Link

Superclass - <Control Link>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies a specialized <Control Link> instance providing the connection between an ordered aggregation of <Expression> components and the target fields of one or more <CMY Colour> instances.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. Consider a transmittal, produced with CMY colours, the <Model Library> instance of which contains a <Model> component representing a car with a <Geometry Model> instance, the geometry of which consists of <Polygon> instances with <Inline Colour> components.

    This car model is instanced in many places throughout the transmittal, and the data provider wishes to vary its appearance depending on the <Geometry Model Instance> instance. Consequently, each <CMY Colour> instance in the <Model> instance has a <CMY Colour Control Link> component, supplying the value of the yellow field of the cmy_data field of the <CMY Colour> instance with a <Variable> component as depicted in Figure 6.4:

    CMY Colour Control Link, Example 1

    Figure 4 — <DRM CMY Colour Control Link> example

FAQs

No FAQs supplied.

Constraints

Composed of (two-way) (inherited)

Component of (two-way)

Inherited Field Elements

SE_String description; 1

Field Elements

SE_Integer_Unsigned cyan_expression_index; 2
SE_Integer_Unsigned magenta_expression_index; 3
SE_Integer_Unsigned yellow_expression_index; 4

Notes

Fields Notes

description

The description field specifies a text description of the purpose of the <Control Link> instance.

cyan_expression_index

The cyan_expression_index field is a one-based index into the ordered aggregation of <Expression> components and is used to select the specific <Expression> component (if any) that controls the cyan field values of the cmy_data field(s) of the target <CMY Colour> instance(s). If the value is zero, the cyan field of those <CMY Colour> instance(s) is not controlled.

magenta_expression_index

The magenta_expression_index field is a one-based index into the ordered aggregation of <Expression> components and is used to select the specific <Expression> component (if any) that controls the magenta field values of the cmy_data field(s) of the target <CMY Colour> instance(s). If the value is zero, the magenta field of those <CMY Colour> instance(s) is not controlled.

yellow_expression_index

The yellow_expression_index field is a one-based index into the ordered aggregation of <Expression> components and is used to select the specific <Expression> component (if any) that controls the yellow field values of the cmy_data field(s) of the target <CMY Colour> instance(s). If the value is zero, the yellow field of those <CMY Colour> instance(s) is not controlled.


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Last updated: July 26, 2006 Copyright © 2006 SEDRIS