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Application module: Parameter value specification | ISO/WD 10303-1470 |
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;
(*
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.
This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.
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;
(*
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.
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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