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Application module: Description assignment | ISO/WD 10303-1473 |
This clause specifies the information requirements for the Description 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 Description assignment schema.
EXPRESS specification:
*)
SCHEMA Description_assignment_arm;
(*
This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.
The description_item type is an extensible list of alternate data types. Additional alternate data types are specified in select data types that extend the description_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
description_item =
EXTENSIBLE
GENERIC_ENTITY
SELECT;
END_TYPE;
(*
This subclause specifies the ARM entities for this module. Each ARM application entity is an atomic element that embodies a unique application concept and contains attributes specifying the data elements of the entity. The ARM entities and definitions are specified below.
EXPRESS specification:
*)
ENTITY Description_text;
description : STRING;
END_ENTITY;
(*
Attribute definitions:
description: the text that constitutes the description
EXPRESS specification:
*)
ENTITY Description_text_assignment;
description : Description_text;
items : SET[1:?] OF description_item;
END_ENTITY;
(*
Attribute definitions:
description: the text that constitutes the description
items: the set of items being described
*)
END_SCHEMA; -- Description_assignment_arm
(*
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