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Application module: Expression assignment | ISO/WD 10303-1491 |
This clause specifies the information requirements for the Expression assignment 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 Expression_assignment_arm schema and identifies the necessary external references.
EXPRESS specification:
*)
SCHEMA Expression_assignment_arm;
(*
The following EXPRESS interface statement specifies the elements imported from the ARM of another application module.
EXPRESS specification:
*)
USE FROM
Expression_arm;
--
ISO/TS 10303-1342
(*
NOTE 1 The schemas referenced above are specified in the following part of ISO 10303:
Expression_arm ISO/TS 10303-1342
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 expression_assignment_item type is an extensible list of alternate data types. Additional alternate data types are specified in select data types that extend the expression_assignment_item type.
NOTE This empty extensible select requires extension in a further module to ensure that entities that refer to it have at least one valid instantiation.
EXPRESS specification:
*)
TYPE
expression_assignment_item =
EXTENSIBLE
GENERIC_ENTITY
SELECT;
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 Expression_assignment;
expression : Expression;
item : expression_assignment_item;
END_ENTITY;
(*
Attribute definitions:
expression: the expression being assigned
item: the item to which the expression is being assigned
*)
END_SCHEMA; -- Expression_assignment_arm
(*
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