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Application module:
Description assignment |
ISO/TS 10303-1473:2019(E)
© ISO
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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.
This clause defines the information requirements to which implementations shall
conform using the EXPRESS language as defined in ISO 10303-11.
The following 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.
A Description_text is a set of words that describe something.
EXAMPLE
The same thing may have multiple descriptions associated with it. Relating both a short description and
a long description to an operational activity or an organization, as required by the US DoD Architecture Framework, are examples
of multiple descriptions applied to the same item.
EXPRESS specification:
*)
ENTITY Description_text;
description : STRING;
END_ENTITY;
(*
Attribute definitions:
description:
the text that constitutes the description
A Description_text_assignment is the assignment of a description to something.
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
A Description_text_assignment_relationship is a relationship between two
Description_text_assignment
objects.
EXPRESS specification:
*)
ENTITY Description_text_assignment_relationship;
description :
OPTIONAL
STRING;
id :
OPTIONAL
STRING;
related : Description_text_assignment;
relating : Description_text_assignment;
relation_type : STRING;
WHERE
WR1: relating :<>: related;
END_ENTITY;
(*
Attribute definitions:
description:
the text or the set of texts that provide further information about the Description_text_assignment_relationship. The value of this attribute need not be specified.
id:
the identifier or set of identifiers for the Description_text_assignment_relationship. The value of this attribute need not be specified.
related:
the other object of
Description_text_assignment
that is part of the relationship.
relating:
one object of
Description_text_assignment
that is part of the relationship.
relation_type:
the meaning of the relationship.
Formal propositions:
WR1:
the related and the relating must be different.
*)
END_SCHEMA; -- Description_assignment_arm
(*
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