Application module: External item identification assignment | ISO/TS 10303-1128:2004(E) © ISO |
This clause specifies the information requirements for the External item identification 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 External item identification assignment schema.
EXPRESS specification:
*)
SCHEMA External_item_identification_assignment_arm;
(*
This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.
The external_identification_item type is an extensible list of alternate data types. Additional alternate data types are specified in select data types that extend the external_identification_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
external_identification_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 External_item_identification
SUBTYPE OF (External_source_identification);
external_id : STRING;
END_ENTITY;
(*
Attribute definitions:
external_id: the identifier of the external item, in its external context.
EXAMPLE 1 For a digital file, the file name of a file in the directory where it is located is an example of external_id.
EXAMPLE 2 For a book, the external_id could be the ISBN number.
EXPRESS specification:
*)
ENTITY External_source_identification;
source_id : STRING;
source_type : STRING;
item : external_identification_item;
description :
OPTIONAL
STRING;
END_ENTITY;
(*
Attribute definitions:
source_id: the text that identifies the context in which the external_id is specified.
EXAMPLE 1 For a digital file identified by a filename and directory path, the source_id is the directory path.
source_type: the text that identifies the identification scheme of the source_id.
EXAMPLE 2 In the case of files, examples of source_type are:
item: the external_identification_item whose source is identified.
description: the text that provides further information about the external identification. The value of this attribute need not be specified.
*)
END_SCHEMA; -- External_item_identification_assignment_arm
(*
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