Function

The SEDRIS Data Representation Model APPENDIX A - Classes Function

Abstract Class Name: Function

Superclass - <Expression>

Subclasses

Definition

An instance of this DRM class specifies an expression for which the value is determined by evaluating the arguments of the expression (the ordered <Expression> components of the <Function> instance) and using the results to evaluate the function.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

See concrete subclasses for examples.

FAQs

See the subclasses for details.

Constraints

Composed of (two-way)

zero or more {ordered} <Expression> instances¹

Component of (two-way) (inherited)

zero or more <Control Link> instances
zero or more <Feature Model Instance> instances, each through the use of a <Model Instance Template Indices> link object
zero or more <Function> instances
zero or more <Geometry Model Instance> instances, each through the use of a <Model Instance Template Indices> link object

Inherited Field Elements

This class has no inherited field elements.

Field Elements

EDCS_Attribute_Value_Type	value_type;	²

Notes

Composed of Notes

Expression

The <Expression> components of a <Function> instance, if any, represent the arguments of the function being represented, so a <Function> instance has <Expression> components if that <Function> instance takes arguments. The <Expression> components are ordered so as to unambiguously specify which <Expression> component is being supplied for each argument of the <Function> instance. The exact interpretation of each argument is defined by the specific function.

Fields Notes

value_type

The value_type of a <Function> instance specifies the type of value returned.

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Last updated: July 26, 2006