IEC 61360-5:2004

INTERNATIONAL IEC
STANDARD 61360-5
First edition
2004-04
Standard data element types with associated
classification scheme for electric components –
Part 5:
Extensions to the EXPRESS dictionary schema

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INTERNATIONAL IEC
STANDARD 61360-5
First edition
2004-04
Standard data element types with associated
classification scheme for electric components –
Part 5:
Extensions to the EXPRESS dictionary schema

 IEC 2004  Copyright - all rights reserved
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– 2 – 61360-5  IEC:2004(E)
CONTENTS
FOREWORD.3
1 Scope and object.6
2 Normative references.7
3 Definitions and abbreviations.7
4 Structure of IEC 61360-5 .12
4.1 Generic resource.12
4.2 Library integrated information model .12
5 Requirements.14

Annex A (informative) ISO13584_IEC61360_dictionary_aggregate_extension_schema .15
Annex B (informative) Library integrated information model 25 .20
Annex C (informative)  ISO13584_25_IEC61360_5_library_implicit_schema expanded
listing.38
Annex D (informative) Standard data requirements for library integrated information
model 25.40
Annex E (informative) Implementation method specific requirements for the library
integrated information model 25.51
Annex F (informative) EXPRESS_G diagram .52

Bibliography.53

Figure F.1 – ISO13584_IEC61630_dictionary_aggregate_extension_schema diagram.52

Table 1 – Conformance options of library integrated information model 25.21
Table D.1 – ISO 13584 LIIM 25 conformance class specification .41

61360-5  IEC:2004(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
STANDARD DATA ELEMENT TYPES
WITH ASSOCIATED CLASSIFICATION SCHEME
FOR ELECTRIC COMPONENTS –
Part 5: Extensions to the EXPRESS dictionary schema

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61360-5 has been prepared by subcommittee 3D: Data sets for
libraries, of IEC technical committee 3: Information structures, documentation and graphical
symbols
The text of this standard is based on the following documents:
FDIS Report on voting
3D/128/FDIS 3D/129/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61360-5  IEC:2004(E)
IEC 61360 consists of the following parts, under the general title Standard data element types
with associated classification scheme for electric components:
– Part 1: Definitions – Principles and methods
– Part 2: EXPRESS dictionary schema
– Part 3: Maintenance and validation procedures
– Part 4: IEC reference collection of standard data element types, component classes and
terms.
– Part 5: Extensions to the EXPRESS dictionary schema.
The committee has decided that the contents of this publication will remain unchanged until
2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual edition of this standard may be issued at a later date.

61360-5  IEC:2004(E) – 5 –
INTRODUCTION
To understand the generic resources used in this part of the IEC 61360 series knowledge of
EXPRESS as defined in ISO 10303-11:1994 is required. Basic knowledge of ISO 13584-
24:2003, and ISO 13584-42:1998 is also required.
The generic resources specified in this document were developed as a joint effort of
ISO Technical Committee 184/Subcommittee 4/Working Group 2 and IEC Subcommittee 3D.
They are intended to be documented both in this part of IEC 61360 and ISO 13584. Both
committees agreed not to change and/or modify the EXPRESS schemas independently of
each other in order to guarantee the harmonization and the reusability of the work from both
committees. Requests for amendments should therefore be sent to both committees. These
requests should be adopted by both committees before modifying the EXPRESS schemas.
This document is fully compatible with ISO 13584 parts 42 and 25.
This document contains those extensions to the common ISO13584_IEC61360_dictionary_
schema (IEC 61360-2) that are generated in order to fulfil user needs.
The following parts are copied from ISO 13584-25 and appear in IEC 61360-5 as follows:
ISO 13584-25 IEC 61360-5
Clause 6 Annex A (informative)
Clause 8 Annex B (informative)
Annex C Annex C (informative)
Annex D Annex D (informative)
Annex E Annex E (informative)
Figure F.1 Annex F (informative)

– 6 – 61360-5  IEC:2004(E)
STANDARD DATA ELEMENT TYPES
WITH ASSOCIATED CLASSIFICATION SCHEME
FOR ELECTRIC COMPONENTS –
Part 5: Extensions to the EXPRESS dictionary schema

1 Scope and object
The scope of this part of IEC 61360 is the extension of the common ISO/IEC dictionary
schema for the definition of concepts which are used in IEC 61360-1 but which are not
addressed by the information models specified in IEC 61360-2.
The object of this standard is to provide a formal model for data according to the scope as
given above, and thus to provide, with IEC 61360-2, a means for the computer-sensible
representation and exchange of all data which comply with IEC 61360-1.
The common ISO/IEC dictionary schema as defined in IEC 61360-2 is the common ISO/IEC
dictionary schema based on the intersection of the scopes of the two base standards:
• IEC 61360-1;
• ISO 13584-42.
and facilitates a harmonization of both.
Quotation of a relevant part from the scope and object of IEC 61360-1:
This part of IEC 61360 provides a firm basis for the clear and unambiguous definition of
characteristic properties (data element types) of all elements of electrotechnical systems from
basic components to subassemblies and full systems. Although originally conceived in the
context of providing a basis for the exchange of information on electric/electronic
components, the principles and methods of this standard may be used in areas outside the
original conception such as assemblies of components and electrotechnical systems and
subsystems
Quotation of a relevant part from the introduction of ISO 13584-42:
This part of ISO 13584 provides rules and guidelines for library data suppliers to create
hierarchies of families of parts according to a common methodology intended to enable multi-
supplier consistency. These rules pertain to the following: the method for grouping parts into
families of parts to form a hierarchy; the dictionary elements that describe the families and
properties of parts.
IEC 61360-2 provides a common information model for the work of both committees, thus
allowing for the implementation of dictionary systems dealing with data delivered according to
either of the standards elaborated by both committees.

61360-5  IEC:2004(E) – 7 –
This part of IEC 61360 provides a Library Integrated Information Model (liim) that, with
resources from IEC 61360-2, ISO 13584 and ISO 10303, allows modelling and exchanging
dictionary information compliant with IEC 61360-1.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 61360-1:2002, Standard data element types with associated classification scheme for
electric components – Part 1: Definitions – Principles and methods
IEC 61360-2:2002, Standard data element types with associated classification scheme for
electric components – Part 2: EXPRESS dictionary schema
IEC 61360-4:1997, Standard data element types with associated classification scheme for
electric components – Part 4: IEC reference collection of standard data element types,
component classes and terms
ISO 10303-11:1994, Industrial automation systems and integration – Product data
representation and exchange – Part 11: Description methods: The EXPRESS language
reference manual
ISO 13584-1:2001, Industrial automation systems and integration – Parts library – Part 1:
Overview and fundamental principles
ISO 13584-24:2003, Industrial automation systems and integration – Parts library – Part 24:
Logical resource: Logical model of supplier library
ISO 13584-25, Industrial automation systems and integration – Parts library – Part 25: Logical
resource: Logical model of supplier library with aggregate values and explicit content
ISO 13584-42:1998, Industrial automation systems and integration – Parts library – Part 42:
Description methodology: Methodology for structuring part families
3 Terms and definitions and abbreviations
For the purposes of this document, the terms and definitions as given in IEC 61360-1,
IEC 61360-2, ISO 13584-24 as well as the following apply. Some of these definitions are
repeated for convenience.
NOTE Definitions copied verbatim from other standards are followed by a reference to the source standard in
brackets. Definitions that have been adapted from other standards are followed by an explanatory note.
3.1
applicable property
a property that is defined for some family of parts and that shall apply to any part that belongs
to this family of parts
[ISO 13584-24:2003, definition 3.3]
EXAMPLE For a generic family of screws, the threaded diameter is an applicable property. This characteristic
applies to any screw.
___________
To be published.
– 8 – 61360-5  IEC:2004(E)
3.2
basic semantic unit
BSU
entity that provides an absolute and universal identification of certain objects of the
application domain (for example classes, data element types)
[IEC 61360-2:2002, definition 2.1]
3.3
class extension
the set of all instances satisfying the class definition
[ISO 13584-24:2003, definition 3.13]
3.4
common dictionary schema
information model for a dictionary, using the modelling language EXPRESS
[IEC 61360-2:2002, definition 2.3]
NOTE The common dictionary schema is formally named ISO13584_IEC61360_dictionary_schema and is
specified in IEC 61360-2:2002. This schema is duplicated in Annex D of ISO 13584-42:1998.
3.5
conformance class
a subset of a standard for which conformance may be claimed
[ISO 13584-24:2003, definition 3.17]
3.6
conformance requirement
a precise, text definition of a characteristic required to be present in a conforming
implementation
[ISO 10303-1:1994, definition 3.2.13]
3.7
dictionary element
set of attributes that constitutes the dictionary description of certain objects of the application
domain (for example classes, data element types)
[IEC 61360-2:2002, definition 2.2]
3.8
data element type
DET
unit of data for which the identification, description and value representation have been
specified
[IEC 61360-1:2002, definition 2.3]
3.9
data type
set of allowed values of a data element type.
[IEC 61360-2:2002, definition 2.4]
NOTE Within IEC the data_type that is either a unit of measure or a value domain is defined separately for each
data element type.
61360-5  IEC:2004(E) – 9 –
3.10
family of parts
a simple or generic family of parts
[ISO 13584-24:2003, definition 3.40 ]
3.11
functional model
the library data that represent one representation category of a part in an integrated library
[ISO 13584-1:2001,definition 3.1.3]
3.12
functional view
the data that represent one representation category of a part in product data
[ISO 13584-1:2001, definition 3.1.4]
NOTE The structure of a functional view does not depend on the part it represents.
3.13
general model
the library data that carries the definition and identity of a part in an integrated library
[ISO 13584-1:2001, definition 3.1.5]
3.14
generic family of parts
a grouping of simple or generic families of parts done for purposes of classification or for
factoring common information
[ISO 13584-24:2003, definition 3.44]
3.15
library delivery file
a population of EXPRESS entity instances conforming to a library integrated information
model and represented according to one of the implementation methods specified in
ISO 10303
[ISO 13584-24:2003, definition 3.68]
NOTE A library delivery file specifies the structure and the content of a supplier library. It may reference library
external files.
3.16
library part
a part associated with a set of data that represents it in a library
[ISO 13584-1:2001, definition 3.1.13]
3.17
library part data
data that represent a part in a library
[ISO 13584-1:2001, defintion 3.1.14]
3.18
library exchange context
the set of one library delivery file and zero, one or more library external files that represent
together a supplier library
[ISO 13584-24:2003, definition 3.70]

– 10 – 61360-5  IEC:2004(E)
3.19
library external file
a file, referenced from a library delivery file, that contributes to the definition of a supplier
library
[ISO 13584-24:2003, definition 3.71]
NOTE The structure and the format of a library external file is specified in the library delivery file that references
it.
3.20
library integrated information model
LIIM
an EXPRESS schema that integrates resource constructs from different EXPRESS schemas
for representing supplier libraries for the purpose of exchange and that is associated with
conformance requirements
[ISO 13584-24:2003, definition 3.72]
3.21
library specification of a class
the explicit representation of a class extension in a supplier library
[ISO 13584-24:2003, definition 3.76]
NOTE 1 In the ISO 13584 series, every class is intentionally defined through a dictionary element. Only those
classes of which the supplier desires to represent explicitly the possible instances are associated with a library
specification.
NOTE 2 In ISO 13584-24, the library specification of a class consists of a set that contains all the different
possible instances.
3.22
part
material or functional element that is intended to constitute a component of different products
[ISO 13584-1:2001, definition 3.1.16]
3.23
property
an information that may be represented by a data element type
[ISO 13584-42:1998, definition 3.4.10]
3.24
representation category
an abstraction used to distinguish between various possible user requirements regarding a
part representation
[ISO 13584-1:2001, definition 3.1.20]
NOTE In the model defined in the ISO 13584 standard series, this distinction is formally expressed in terms of a
view logical name and in terms of the view control variables.
3.25
resource construct
the collection of EXPRESS language entities, types, functions, rules and references that
together define a valid description of data
[ISO 13584-24:2003, definition 3.97]

61360-5  IEC:2004(E) – 11 –
3.26
simple family of parts
a set of parts of which each part may be described by the same group of properties

[ISO 13584-24:2003, definition 3.98 ]
3.27
supplier library
a set of data, and possibly of programs, for which the supplier is defined and that describes in
the standard format defined in ISO 13584 a set of parts and/or a set of representation of parts
[ISO 13584-1:2001, definition 3.1.22]
3.28
user library
information that results from the integration of one or more supplier libraries by the library
management system and possibly from a later adaptation performed by the user
[ISO 13584-1:2001, definition 3.1.23]
3.29
view exchange protocol
VEP
a part of ISO 13584 that describes the use of resource constructs and of representation
transmission interfaces that satisfy the information requirement for the exchange of one
representation category of parts
[ISO 13584-24:2003, definition 3.107]
3.30
visible property
a property that is defined for some family of parts and that may or not apply to the different
parts of this family of parts
[ISO 13584-24:2003, definition 3.109 ]
EXAMPLE For a generic family of screws, the non-threaded length is a visible property: it is clearly defined for
any screw, but only those screws with a non-threaded part have a value for this property.
NOTE The code of the class where a property is defined as visible is part of the identification of the data element
type that represents this property.
3.31
IEC root class
class that is the superclass of all the classes defined in IEC 61360-4; its class code is
‘AAA000' and its version is ‘001'
[IEC 61360-2:2002, definition 2.5]
3.32
applicable data element type
data element type that is defined for some component class and that applies to any
component that belongs to this component class
[IEC 61360-2:2002, definition 2.6]
3.33
visible data element type
data element type that is defined for some component class and that may or may not apply to
the different components of this component class.
NOTE 1 The code of the class where a data element type is defined as visible is part of the identification of this
data element type.
– 12 – 61360-5  IEC:2004(E)
NOTE 2 Within IEC all data element types are defined as visible at the level of the root class, that is the
superclass of both the component class and the material class.
4 Structure of IEC 61360-5
IEC 61360-5 has two main parts:
• the generic resource part provides resource constructs for representing aggregate data
types. Aggregate data types and values are modelled in total conformance with the
EXPRESS language.
• the library integrated information model gathers the above resource construct with other
generic resource constructs from IEC 61360-2 and from different parts of ISO 13584 and
ISO 10303 into one single schema for representing dictionaries that may include
aggregate data types.
4.1 Generic resource
The generic resource contains the
ISO13584_IEC61360_dictionary_aggregate_extension_schema EXPRESS schema.
This schema provides resource constructs that are generic in nature. It may be used outside
the IEC 61360 series and particularly in all the applications that use a data dictionary
compliant with the IEC 61360 series
It provides the resource constructs needed to describe data types corresponding to aggregate
data types as defined in the EXPRESS language. It defines resources to describe array, bag,
list and set data types. These data types extend the data types already defined in the
ISO13584_ISO61360_dictionary_schema published in IEC 61360-2:2002.
4.2 Library integrated information model
4.2.1 General
The library integrated information model specified in this part of IEC 61360, gathers the
generic resource constructs defined in this part of IEC 61360 with other generic resource
constructs from IEC 61360-2 and various other parts of ISO 13584 and ISO 10303 into a
single schema for representing dictionaries for the purpose of exchange. The library
integrated information model was jointly developed between ISO and IEC. For the purpose of
exchanging dictionary information compliant with IEC 61360-1, only four kinds of exchange
are applicable for IEC 61360-5 and are defined below. Other kinds of exchange are defined in
ISO 13584-25.
• Dictionaries that define hierarchies of classes of items, that may be parts, materials or
other items, with aggregate-structured properties using only the EXPRESS resource
constructs defined in the ISO/IEC common dictionary schema or in the
ISO13584_IEC61360_dictionary_aggregate _extension_schema defined in this part of
IEC 61360 correspond to conformance class 1;
• Dictionaries that define hierarchies of classes of items, that may be parts, materials,
features or other items, using the extension of the ISO/IEC common dictionary schema
defined in ISO 13584-24, but without description of item representations and of
representation categories of items, and without aggregate-structured properties,
correspond to conformance class 2;
• Dictionaries that define hierarchies of classes of items, of item representations, and of
representation categories of items, with aggregate-structured properties, correspond to
conformance class 3;
• Dictionaries with the same scope as conformance class 3 but with no more than two levels
nesting for aggregate-structured properties, correspond to conformance class 4;

61360-5  IEC:2004(E) – 13 –
Each of the above kinds of exchange context corresponds to one conformance class of the
library-integrated model ’ISO13584_25_IEC61360_5_liim_schema’. Each conformance class
specifies the conformance requirements for implementations that claim conformance to this
conformance class. In this part of IEC 61360, each subset that defines a conformance class is
defined by means of a list of entities. An implementation that claims conformance to any
conformance class shall support all the entities listed for this conformance class and related
constructs.
The library integrated model ’ISO13584_25_IEC61360_5_liim_schema ’is defined by means
of a set of entities, types and associated constructs that addresses the requirements of both
ISO Technical Committee 184/Subcommittee 4/Working Group 2 and IEC Subcommittee 3D
and is therefore broader than just the IEC conformance class.
4.2.2 Conformance class 1: minimal dictionaries
Conformance class 1 supports the information requirements for exchanging definitions of
hierarchies of item classes, where items may be parts or materials. It allows the exchange of
all dictionary elements from the ISO/IEC dictionary schema (IEC 61360-2) and those
dictionary elements that may have aggregate-structured values according to Annex A of this
part of IEC 61360. Conformance class 1 is associated with implementation methods for the
library delivery file. Conformance requirements to conformance class 1 are defined in B.3.1 of
this part of IEC 61360.
4.2.3 Conformance class 2: dictionaries of items classes
Conformance class 2 supports the information requirements for exchanging definitions of
hierarchies of item classes, where items may be parts, materials or features, whose
properties may not have aggregate-structured values. Conformance class 2 is associated with
a set of standard data that defines the formats of library external files that may be referenced
by a library delivery file conforming to conformance class 2, and with implementation methods
for the library delivery file. Conformance requirements for conformance class 2 are defined in
B.3.2 of this part of IEC 61360.
4.2.4 Conformance class 3: complete dictionaries
Conformance class 3 supports the information requirements for exchanging definitions of
hierarchies of item classes, where items may be parts, materials or features, together with
definitions of representations of such item classes, and with definitions of representation
categories of such item classes. Properties of all these classes may have aggregate-
structured values. Conformance class 3 is associated with a set of standard data that defines
the formats of library external files that may be referenced by a library delivery file conforming
to conformance class 3, and with implementation methods for the library delivery file.
Conformance requirements for conformance class 3 are defined in B.3.3 of this part of
IEC 61360.
4.2.5 Conformance class 4: complete dictionaries with limited nested aggregate
values
Conformance class 4 supports the information requirements corresponding to conformance
class 3 with a restriction. The aggregate values involved in conformance class 4 shall not be
nested more than twice. Conformance requirements for conformance class 4 are defined in
B.3.4 of this part of IEC 61360.
Based on the same library integrated model ’ISO13584_25_IEC61360_5_liim_schema’ five
additional conformance classes are defined for the exchange of libraries and/or instances of
parts. Those definitions can be found in ISO 13584-25.

– 14 – 61360-5  IEC:2004(E)
5 Requirements
The requirements of this standard shall be fulfilled by compliance with the appropriate
Clauses and Annexes from ISO 13584-25.
For convenience these Clauses and Annexes are reproduced below as informative Annexes
to this standard as follows:
Annex A:
EXPRESS information model for the aggregate data type; [Clause 6 of ISO 13584-25]
Annex B:
Definition of the library integrated model ’ISO13584_25_IEC61360_5_liim_schema’,
and the definition of the conformance classes; [Clause 8 of ISO 13584-25]
Annex C:
Library integrated information model ’ISO13584_25_IEC61360_5_liim_schema’,
expanded listing; [Annex C of ISO 13584-25]
Annex D:
Standard data requirements for library integrated information model
’ISO13584_25_IEC61360_5_liim_schema’ [Annex D of ISO 13584-25]
Annex E:
Implementation requirements for the library integrated information model
’ISO13584_25_IEC61360_5_liim_schema’, defining this part of IEC 61360-5; [Annex E
of ISO 13584-25]
Annex F:
EXPRESS diagram for aggregate data types. [Annex F1 of ISO 13584-25].

61360-5  IEC:2004(E) – 15 –
Annex A
(informative)
ISO13584_IEC61360_dictionary_aggregate_extension_schema

A.1 General
This Annex defines the requirements for the ISO13584_IEC61360_dictionary_
aggregate_extension_schema. The following EXPRESS declaration introduces the
ISO13584_IEC61360_dictionary_aggregate_extension_schema and identifies the
necessary external references.
EXPRESS specification:
*)
SCHEMA ISO13584_IEC61360_dictionary_aggregate_extension_schema;

REFERENCE FROM ISO13584_IEC61360_dictionary_schema(
data_type,
entity_instance_type);
(*
NOTE The schema referenced above can be found in the following documents:
ISO13584_IEC61360_dictionary_schema IEC 61360-2:2002
(which is duplicated for convenience in informative Annex D of ISO 13584-42:1998.)
A.2 Introduction to the
ISO13584_IEC61360_dictionary_aggregate_extension_schema
The ISO13584_IEC61360_dictionary_aggregate_extension_schema provides the information
model for the extension to the ISO/IEC common dictionary schema which allows the use of
lists, sets, bags, arrays and sets of subsets of simple or complex data types.
This extension is achieved in two steps.
• the entity_instance_type_for_aggregate entity provides the means to reference
EXPRESS-defined entities that specify aggregate data types. The
entity_instance_type_for_aggregate is a subtype of the entity_instance_type entity;
NOTE The entity_instance_type entity is defined in the IEC 61630-2 and duplicated in ISO 13584-42.
• then, entities that specify aggregate data types are modelled by the aggregate_type
entity and its specializations.
A.3 ISO13584_IEC61360_dictionary_aggregate_extension_schema entity
definitions
The following entity type definitions describe the necessary resources needed to encode
aggregate types.
A.3.1 Aggregate_entity_instance_type entity
The entity_instance_type_for_aggregate entity provides for referencing definitions of data
types that may be expressed as lists, sets, bags or arrays of simple or complex values. It is
defined by referencing an aggregate_type defined in this schema.

– 16 – 61360-5  IEC:2004(E)
EXPRESS specification:
*)
ENTITY entity_instance_type_for_aggregate
SUBTYPE OF(entity_instance_type);
type_structure: aggregate_type;
WHERE
WR1: SELF\entity_instance_type.type_name =

['ISO13584_IEC61360_DICTIONARY_AGGREGATE_EXTENSION_SCHEMA'
+ '.AGGREGATE_TYPE'];
END_ENTITY;
(*
Attribute definition:
type_structure: the aggregate_type referenced and carried by the entity_instance_type.
Formal propositions:
WR1: the type_name attribute of the entity_instance_type shall contain the
string ‘ISO13584_IEC61360_DICTIONARY_AGGREGATE_EXTENSION_SCHEMA.AGGREG
ATE_TYPE’.
A.3.2 Aggregate_type entity
The aggregate_type entity provides for the definition of data types that may be expressed as
lists, sets, bags or arrays of simple or complex values.
EXPRESS specification:
*)
ENTITY aggregate_type
ABSTRACT SUPERTYPE OF(ONEOF(
list_type,
set_type,
bag_type,
array_type, set_with_subset_constraint_type ));
bound_1: OPTIONAL INTEGER;
bound_2: OPTIONAL INTEGER;
value_type: data_type;
WHERE
WR1: bound_1 <= bound_2;
END_ENTITY;
(*
Attribute definition:
value_type: is the type of value (simple or complex) which is used for each element of the aggregate.
bound_1: the optional integer that defines the low bound of the defined aggregate type.
bound_2: the optional integer that defines the upper bound of the defined aggregate type.
Formal propositions:
WR1: bound_1 cannot be greater than bound_2.
A.3.3 List_type entity
The list_type entity provides for the definition of data types that may be expressed as
ordered lists of values in which duplication may or may not be allowed.

61360-5  IEC:2004(E) – 17 –
EXPRESS specification:
*)
ENTITY list_type
SUBTYPE OF(aggregate_type);
uniqueness: BOOLEAN;
WHERE
WR1: EXISTS(bound_1) OR NOT(EXISTS(bound_2));
WR2: NOT(EXISTS(bound_1)) OR (bound_1 >= 0);
END_ENTITY;
(*
Attribute definition:
uniqueness: a flag to indicate whether all elements of the list must be unique (true) or
whether duplicates are allowed (false).
Formal propositions:
WR1: if the upper bound bound_2 of the defined list optional attribute exists, it implies that
the lower bound bound_1 optional attribute of the defined list exists as well.
WR2: if the lower bound bound_1 of the defined list optional attribute exists then it is greater
or equal to 0.
A.3.4 Set_type entity
The set_type entity provides for the definition of data types that may be expressed as
unordered collections of values in which no duplication can occur.
EXPRESS specification:
*)
ENTITY set_type
SUBTYPE OF(aggregate_type);
WHERE
WR1: EXISTS(bound_1) OR NOT(EXISTS(bound_2));
WR2: NOT(EXISTS(bound_1)) OR (bound_1 >= 0);
END_ENTITY;
(*
Formal propositions:
WR1: if the upper bound bound_2 of the defined list optional attribute exists, it implies that
the lower bound bound_1 optional attribute of the defined list exists as well.
WR2: if the lower bound bound_1 of the defined list optional attribute exists then it is greater
or equal to 0.
A.3.5 Bag_type entity
The bag_type entity provides for the definition of data types that may be expressed as
unordered collections of values in which duplication may occur.
EXPRESS specification:
*)
ENTITY bag_type
SUBTYPE OF(aggregate_type);
WHERE
WR1: EXISTS(bound_1) OR NOT(EXISTS(bound_2));
WR2: NOT(EXISTS(bound_1)) OR (bound_1 >= 0);

– 18 – 61360-5  IEC:2004(E)
END_ENTITY;
(*
Formal propositions:
WR1: if the upper bound bound_2 of the defined list optional attribute exists, it implies that
the lower bound bound_1 optional attribute of the defined list exists as well.
WR2: if the lower bound bound_1 of the defined list optional attribute exists then it is greater
or equal to 0.
A.3.6 Array_type entity
The array_type entity provides for the definition of data types that may be expressed as an
array of values. An array data type has as its domain indexed, fixed-size collection of like
elements. The lower and upper bounds, which are integer values, define the range of index
values and thus the size of each array collection. An array data type definition may optionally
specify that an array value cannot contain duplicate elements.
EXPRESS specification:
*)
ENTITY array_type
SUBTYPE OF (aggregate_type);
SELF\aggregate_type.bound_1: INTEGER;
SELF\aggregate_type.bound_2: INTEGER;
uniqueness: BOOLEAN;
are_optional: BOOLEAN;
END_ENTITY;
(*
Attribute definition:
bound_1: the integer that defines the low index of the defined aggregate type.
bound_2: the integer that defines the upper index of the defined aggregate type.
uniqueness: indicates whether all elements of the array must be present (false) or whether
some elements of the array may be missing (true).
are_optional: indicates whether all elements of the array must be present (false) or whether
some elements of the array may be missing (true).
A.3.7 Set_with_subset_constraint_type entity
The set_with_subset_constraint_type entity provides for the definition of data types that
may be expressed as a set of values of which subsets may be extracted. The sizes of allowed
subsets are defined by their minimal and maximal values. If these sizes do not exist, any
subset is allowed.
NOTE The context in which subsets may be extracted is outside the scope of the part of ISO 13584.
EXPRESS specification:
*)
ENTITY set_with_subset_constraint_type
SUBTYPE OF (aggregate_type);
cardinal_min: OPTIONAL INTEGER;
cardinal_max: OPTIONAL INTEGER;
WHERE
WR1: cardinal_min <= cardinal_max ;
WR2: NOT EXISTS (bound_2) OR NOT EXISTS (cardinal_max)
OR (cardinal_max <= bound_2);
61360-5  IEC:2004(E) – 19 –
WR3: NOT EXISTS (bound_1) OR NOT EXISTS (cardinal_min)
OR (cardinal_min <= bound_1);
END_ENTITY;
(*
Attribute definition:
cardinal_min: the minimal size of the subsets that may be extracted.
cardinal_max: the maximal size of the subsets that may be extracted.
Formal propositions:
WR1: the minimal size of the subsets that may be extracted cardinal_min shall be less or
equal the maximal size of the subsets that may be extracted cardinal_max.
WR2: the maximal size of the subsets that may be extracted from the set shall not be greater
than the maximal size of the set itself.
WR3: the minimal size of the subsets that may be extracted from the set shall not be greater
than the minimal size of the set itself.
*)
END_SCHEMA;
-- ISO13584_IEC61360_dictionary_aggregate_extension_schema

(*
– 20 – 61360-5  IEC:2004(E)
Annex B
(informative)
Library integrated information model 25

B.1 General
Conformance to the library integrated information model LIIM 25 includes satisfying the
information requirements stated in the ISO13584_25_IEC61360_5_liim_schema schema
presented in Clause B.2, the requirements to support standard data stated in the
ISO13584_25_IEC61360_5_conformance_schema schema presented in Annex D, the
requirements of the implementation method(s) supported and the relevant requirements of the
normative references.
An implementation shall support at least the following implementation method: ISO 10303-21.
Requirements with respect to implementation methods are specified in Annex E.
The ISO13584_25_IEC61360_5_liim_schema schema provides for a number of options that
may be supported by an implementation. These options have been grouped into conformance
classes. Nine conformance classes are defined. Options are defined by each class and may
be selected by an implementation. Conformance to a particular conformance class requires
that all the ISO13584_25_IEC61360_5_liim_schema entities, types and associated
constraints defined as part of the class, be supported, together with the standard data
associated with the class.
NOTE 1 Support of standard data associated with a class is insured by the global rule specified in the
ISO13584_25_IEC61360_5_conformance_schema.
The numbering schema of the conformance classes is as follows:
• class 1: minimal dictionary_elements from the ISO/IEC common dictionary schema more
aggregate types;
NOTE 2 The ISO/IEC common dictionary schema is defined by the ISO13584_IEC61360_dictionary_schema
documented in ISO 13584-42:1998.
• class 2: dictionary_elements from the extended dictionary schema without functional
models and functional views and without aggregate types;
NOTE 3 The extended dictionary schema is defined by the ISO13584_extended_dictionary_schema
documented in ISO 13584-24.
• class 3: dictionary_elements from the extended dictionary schema with functional models
and functional views and aggregate types;
• class 4: identical to class 3 but with limited nested aggregate types;
• class 5: dictionary_elements from the extended dictionary schema without functional
models and functional views classes and without aggregate types and values, but with
explicit description of class_extensions for the classes in the library;
• class 6: dictionary_elements from the extended dictionary schema with functional models
and functional views, aggregate types and values and with explicit description of
class_extensions for the classes in the library;
• class 7: identical to class 6 but with limited nested aggregate types and values;
• class 10: item instances and item representation instances without dictionary definitions
and without library structure;
• class 11: item instances and item representation instances with dictionary definitions but
without library structure.
61360-5  IEC:2004(E) – 21 –
NOTE 4 The attribute values for the external_file
...