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Application module: Parameter value specification ISO/WD 10303-1470

Cover page
Table of contents
Copyright
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations

4 Information requirements
   4.1 Required AM ARMs
   4.2 ARM type definition
   4.3 ARM entity definition
5 Module interpreted model
   5.1 Mapping specification
   5.2 MIM EXPRESS short listing
     5.2.1 MIM type definitions
     5.2.2 MIM entity definition

A MIM short names
B Information object registration
C ARM EXPRESS-G   EXPRESS-G
D MIM EXPRESS-G   EXPRESS-G
E Computer interpretable listings
Bibliography
Index

4 Information requirements

This clause specifies the information requirements for the Parameter value specification application module. The information requirements are specified as the Application Reference Model (ARM) of this application module.

NOTE 1  A graphical representation of the information requirements is given in Annex C.

NOTE 2  The mapping specification is specified in 5.1. It shows how the information requirements are met by using common resources and constructs defined or imported in the MIM schema of this application module.

The following EXPRESS specification begins the Parameter_value_specification_arm schema and identifies the necessary external references.

EXPRESS specification:

*)
SCHEMA Parameter_value_specification_arm;
(*

4.1 Required AM ARMs

The following EXPRESS interface statements specify the elements imported from the ARMs of other application modules.

EXPRESS specification:

*)
USE FROM Generic_expression_arm;    --  ISO/TS 10303-1341

USE FROM Numeric_function_arm;    --  ISO/TS 10303-1346

USE FROM Value_with_unit_arm;    --  ISO/TS 10303-1054
(*

NOTE 1   The schemas referenced above are specified in the following part of ISO 10303:

Generic_expression_arm ISO/TS 10303-1341
Numeric_function_arm ISO/TS 10303-1346
Value_with_unit_arm ISO/TS 10303-1054

NOTE 2   See Annex C, Figures C.1and C.2 for a graphical representation of this schema.

4.2 ARM type definition

This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.

4.2.1 parameter_value_select   EXPRESS-G

The parameter_value_select type is an extensible list of alternate data types that allows for the designation of the data types Generic_expression and Value_with_unit.

NOTE 1   The list of entity data types may be extended in application modules that use the constructs of this module.

Extensions to parameter_value_select allow an instance of any entity type to be part of a parameter_value_select.

NOTE 2   A parameter_value_select enables other parts of ISO 10303 to provide parameter values that are single-valued, expression-valued, or values with units of measure as well as any entity instance of any entity type visible in the using schema.

EXPRESS specification:

*)
TYPE parameter_value_select = EXTENSIBLE GENERIC_ENTITY SELECT
   (Generic_expression,
    Value_with_unit);
END_TYPE;
(*

4.3 ARM entity definition

This subclause specifies the ARM entity for this module. The ARM entity is an atomic element that embodies a unique application concept and contains attributes specifying the data elements of the entity. The ARM entity and definition is specified below.

4.3.1 Named_variable_semantics   EXPRESS-GMapping table

A Named_variable_semantics is a type of Variable_semantics that is the definition of the context and name for a variable in an expression.

EXPRESS specification:

*)
ENTITY Named_variable_semantics
  SUBTYPE OF (Variable_semantics);
  name : STRING;
  variable_context : Generic_expression;
END_ENTITY;
(*

Attribute definitions:

name: the name of the variable

variable_context: the expression in which the named variable takes part



*)
END_SCHEMA;  -- Parameter_value_specification_arm
(*


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