The SEDRIS Data Representation Model
APPENDIX A - Classes
Control Link

Abstract Class Name: Control Link

Superclass - <SEDRIS Abstract Base>

Subclasses

Definition

This class is an abstract base class used to provide the connection between <Expressions> and the fields of other SEDRIS objects (called target objects). For each class of target object, there shall be a specialization of this class to match it. Objects of the specialized subclass shall be aggregated by the target object. The definition of each subclass shall specify how the ordered list of <Expressions> is used to determine the values of the fields of the target object (called target fields).

In general, a specialized <Control Link> will contain at least one field (called a link field) for each target field in the target object. The link field is an index into the ordered aggregation of <Expressions>, and is used to select the specific <Expression> that controls the value of the target field. The specialization may also contain "constraint" fields that are indexes into the ordered aggregation of <Expressions>, and are used to constrain the values of the target field.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

See individual subclasses for examples.

Constraints

None.

Composed of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_String description; (notes)

Notes

Fields Notes


description

 A text description of what the <Control Link> is for

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Last updated: October 1, 2002 Copyright © 2002 SEDRIS™