SIST EN ISO 19126:2021
(Main)Geographic information - Feature concept dictionaries and registers (ISO 19126:2021)
Geographic information - Feature concept dictionaries and registers (ISO 19126:2021)
This document specifies a schema for feature concept dictionaries to be established and managed as registers. It does not specify schemas for feature catalogues or for the management of feature catalogues as registers. However, as feature catalogues are often derived from feature concept dictionaries, this document does specify a schema for a hierarchical register of feature concept dictionaries and feature catalogues. These registers are in accordance with ISO 19135‑1.
Geoinformation - Verzeichnisse und Register für Featurekonzepte (ISO 19126:2021)
Information géographique - Dictionnaires de concepts de caractéristiques et registres (ISO 19126:2021)
Le présent document spécifie un schéma pour les dictionnaires de concepts d'entités à établir et à gérer comme des registres. Il ne spécifie pas de schémas pour les catalogues d'entités ou pour leur gestion comme des registres. Toutefois, étant donné que les catalogues d'entités sont souvent dérivés des dictionnaires de concepts d'entités, le présent document ne spécifie pas un schéma pour un registre hiérarchique de dictionnaires de concepts d'entités et de catalogues d'entités. Ces registres sont conformes à l'ISO 19135-1.
Geografske informacije - Slovarji in registri konceptov o pojavih (ISO 19126:2021)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 19126:2010
Geografske informacije - Slovarji in registri konceptov o pojavih (ISO 19126:2021)
Geographic information - Feature concept dictionaries and registers (ISO 19126:2021)
Geoinformation - Verzeichnisse und Register für Featurekonzepte (ISO 19126:2021)
Information géographique - Dictionnaires de concepts de caractéristiques et registres
(ISO 19126:2021)
Ta slovenski standard je istoveten z: EN ISO 19126:2021
ICS:
01.040.07 Naravoslovne in uporabne Natural and applied sciences
vede (Slovarji) (Vocabularies)
07.040 Astronomija. Geodezija. Astronomy. Geodesy.
Geografija Geography
35.240.70 Uporabniške rešitve IT v IT applications in science
znanosti
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 19126
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 35.240.70 Supersedes EN ISO 19126:2009
English Version
Geographic information - Feature concept dictionaries and
registers (ISO 19126:2021)
Information géographique - Dictionnaires de concepts Geoinformation - Verzeichnisse und Register für
de caractéristiques et registres (ISO 19126:2021) Featurekonzepte (ISO 19126:2021)
This European Standard was approved by CEN on 20 May 2021.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19126:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 19126:2021) has been prepared by Technical Committee ISO/TC 211
"Geographic information/Geomatics" in collaboration with Technical Committee CEN/TC 287
“Geographic Information” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2021, and conflicting national standards
shall be withdrawn at the latest by December 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 19126:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 19126:2021 has been approved by CEN as EN ISO 19126:2021 without any modification.
INTERNATIONAL ISO
STANDARD 19126
Second edition
2021-05
Geographic information — Feature
concept dictionaries and registers
Information géographique — Dictionnaires de concepts d'entités et
registres
Reference number
ISO 19126:2021(E)
©
ISO 2021
ISO 19126:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
ISO 19126:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conformance . 4
4.1 General . 4
4.2 Conformance for a feature concept dictionary . 5
4.3 Conformance for a register of feature concept dictionaries and/or feature catalogues . 5
5 Concepts . 5
5.1 General . 5
5.2 Feature concept dictionary . 5
5.3 Registers . 6
5.3.1 Overview . 6
5.3.2 Register structure . 6
5.3.3 Compound registry . 6
5.3.4 Register management and registration . 7
5.4 Feature concept dictionary register . 7
5.5 Register of feature concept dictionary and feature catalogue registers . . 8
5.6 Relationship to data product specifications and application schemas . 8
5.7 Community implementations . 8
5.8 Notation . 9
5.9 Packages . 9
6 Feature concept dictionary schema .10
6.1 General .10
6.2 CD_FeatureConceptDictionary .11
6.2.1 General.11
6.2.2 Requirements .12
6.2.3 Properties .13
6.3 CD_Scope .14
6.3.1 General.14
6.3.2 Requirements .14
6.3.3 Properties .14
6.4 CD_Concept .15
6.4.1 General.15
6.4.2 Requirements .15
6.4.3 Properties .16
6.4.4 Subclasses .17
6.5 CD_ConceptRelationship .17
6.5.1 General.17
6.5.2 Requirements .17
6.5.3 Properties .17
6.6 CD_ConceptRelationshipType .18
6.6.1 General.18
6.6.2 Requirements .18
6.6.3 Code values .18
6.7 CD_FeatureConcept .18
6.7.1 General.18
6.7.2 Requirements .19
6.7.3 Properties .19
6.8 CD_FeaturePropertyConcept .20
6.8.1 General.20
ISO 19126:2021(E)
6.8.2 Requirements .20
6.8.3 Properties .20
6.8.4 Subclasses .20
6.9 CD_FeatureAttributeConcept .20
6.9.1 General.20
6.9.2 Requirements .21
6.9.3 Properties .21
6.10 CD_NominalValueConcept .22
6.10.1 General.22
6.10.2 Requirements .22
6.10.3 Properties .23
6.11 CD_FeatureAssociationConcept .23
6.11.1 General.23
6.11.2 Requirements .24
6.11.3 Properties .24
6.12 CD_FeatureRoleConcept .25
6.12.1 General.25
6.12.2 Requirements .25
6.12.3 Properties .25
6.13 CD_FeatureOperationConcept . .26
6.13.1 General.26
6.13.2 Requirements .26
6.13.3 Properties .26
7 Management of feature concept dictionaries as registers .27
7.1 General .27
7.2 Item class for feature concepts .27
7.3 Item class for feature attribute concepts . .28
7.4 Item class for nominal value concepts .28
7.5 Item class for feature association concepts .29
7.6 Item class for feature operation concepts .29
8 Register of feature concept dictionaries and feature catalogues .29
8.1 General .29
8.2 HR_FeatureInformationSubregisterDescription .30
8.2.1 General.30
8.2.2 Requirements .31
8.2.3 Properties .32
8.2.4 Constraints on inherited attributes and associations .32
8.3 HR_FeatureInfoSubRegisterType .33
8.3.1 Requirements .33
8.3.2 Code values .33
8.4 Item classes for feature information subregisters .33
8.4.1 General.33
8.4.2 Item class for feature concept dictionaries .34
8.4.3 Item class for feature data catalogues .34
Annex A (normative) Abstract test suite .35
Annex B (normative) Information to be included in registration proposals .44
Bibliography .49
iv © ISO 2021 – All rights reserved
ISO 19126:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 211, Geographic information/Geomatics,
in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 287, Geographic Information, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 19126:2009), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the UML diagrams has been improved to conform to the current style and the UML to the ISO/TC 211
Harmonized Model for both the 2009 version and this document has been added;
— minor updates have been made to take into account changes to other standards, particularly
ISO 19135-1.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 19126:2021(E)
Introduction
This document specifies a schema for geographic feature concept dictionaries managed as registers.
As described in ISO 19101-1, geographic features are abstractions of real world phenomena associated
with a location relative to the surface of the earth, about which data are collected, maintained and
disseminated.
A feature concept dictionary provides basic definitions and related information about a set of concepts
that may be used to describe geographic features and shared across multiple application areas.
Elements from a feature concept dictionary can be reused in one or more feature catalogues. A feature
catalogue is often associated with a particular application schema, product specification and data set. It
provides a complete textual specification of a set of feature types and their properties and relationships.
See Annex A for further discussion of the relationships between feature concept dictionaries, feature
catalogues, application schemas and product specifications.
ISO 19135-1 specifies procedures for the registration of items of geographic information. Items
of geographic information that can be registered are members of object classes specified in other
standards. This document defines object classes and specifies rules used to establish and maintain
feature concept dictionaries as ISO 19135-1 conformant register schemas.
ISO 19135-1 specifies the structure of a hierarchical register in which the principal register holds a set of
items that describe the subregisters. This document specifies a schema for a hierarchical register where
the subregisters are feature concept dictionaries and/or feature catalogues. This document specifies an
accompanying schema. The resulting hierarchical register can be used as a basis for harmonization and
the establishment of interoperability between different geographic information communities.
Feature concept dictionaries and feature catalogues maintained as registers can serve as sources of
reference for similar registers established by other geographic information communities as part
of a system of cross-referencing. Cross-referencing between respective items in registers of items
of geographic information can be difficult in cases where the structure of registers differs between
information communities. This document can serve as a guide for different information communities
to develop compatible registers that can support a system of geographic information cross-referencing.
vi © ISO 2021 – All rights reserved
INTERNATIONAL STANDARD ISO 19126:2021(E)
Geographic information — Feature concept dictionaries
and registers
1 Scope
This document specifies a schema for feature concept dictionaries to be established and managed as
registers. It does not specify schemas for feature catalogues or for the management of feature catalogues
as registers. However, as feature catalogues are often derived from feature concept dictionaries, this
document does specify a schema for a hierarchical register of feature concept dictionaries and feature
catalogues. These registers are in accordance with ISO 19135-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 19103:2015, Geographic information — Conceptual schema language
ISO 19115-1, Geographic information — Metadata — Part 1: Fundamentals
ISO 19135-1:2015, Geographic information — Procedures for item registration — Part 1: Fundamentals
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
compound registry
registry (3.20) containing multiple registers (3.19) that share the same item classes (3.17) and
coordinated management of a common characteristic
Note 1 to entry: The common characteristic can be a shared namespace for the assignment of names and/or
codes.
3.2
data product
dataset or dataset series that conforms to a data product specification (3.3)
[SOURCE: ISO 19131:2007, 4.6]
3.3
data product specification
detailed description of a dataset or dataset series together with additional information that will enable
it to be created, supplied to and used by another party
[SOURCE: ISO 19131:2007, 4.7, modified — The Note has been removed.]
ISO 19126:2021(E)
3.4
data type
specification of a value domain (3.22) with operations allowed on values in this domain
[SOURCE: ISO 19103:2015, 4.14, modified — Note 1 to entry and the Example have been removed.]
3.5
feature
abstraction of real world phenomena
EXAMPLE The phenomenon named “Eiffel Tower” may be classified with other similar phenomena into a
feature type named “tower”.
Note 1 to entry: A feature can occur as a type or an instance. In this document, feature type is meant unless
otherwise specified.
Note 2 to entry: This document does not address real world phenomena directly. It addresses only their
abstractions (feature concepts and feature types) and feature instances (data collected to represent a feature in
conformance with a specified feature type).
[SOURCE: ISO 19101-1:2014, 4.1.11, modified — Note 2 to entry and the Example have been added.]
3.6
feature association
relationship that links instances of one feature (3.5) type with instances of the same or a different
feature type
Note 1 to entry: A feature association can occur as a type or an instance. In this document, feature association
type is meant unless otherwise specified.
[SOURCE: ISO 19110:2016, 3.3 modified — Note 1 to entry has been added.]
3.7
feature association concept
concept that can be specified in detail as one or more feature association (3.6) types
EXAMPLE A “supports” feature association concept describes a relationship between real world phenomena
such as “highways” and “bridges” where the role of one feature is that it is supported-by the other feature (whose
role is supporter-of ).
3.8
feature attribute
characteristic of a feature
EXAMPLE 1 A feature attribute named “colour” can have an attribute value “green” which belongs to the data
type “text”.
EXAMPLE 2 A feature attribute named “length” an have an attribute value “82,4” which belongs to the data
type “real”.
Note 1 to entry: A feature attribute has a name, a data type and a value domain associated to it. A feature attribute
for a feature instance also has an attribute value taken from the value domain.
Note 2 to entry: A feature attribute can occur as a type or an instance. In this document, feature attribute type is
meant unless otherwise specified.
[SOURCE: ISO 19101-1:2014, 4.1.12, modified — Note 2 to entry has been changed and Note 3 to entry
has been removed.]
2 © ISO 2021 – All rights reserved
ISO 19126:2021(E)
3.9
feature attribute concept
concept that can be specified in detail as one or more feature attribute (3.8) types
EXAMPLE A “height” feature attribute concept describes length in the vertical direction as a characteristic
that can be shared by real world phenomena such as “human”, “tree” and “building.”
3.10
feature catalogue
catalogue containing definitions and descriptions of the feature (3.5) types, feature attributes (3.8),
and feature relationships occurring in one or more sets of geographic data, together with any feature
operations (3.13) that can be applied
[SOURCE: ISO 19101-1:2014, 4.1.13]
3.11
feature concept
concept that can be specified in detail as one or more feature (3.5) types
EXAMPLE The feature concept “road” can be used to specify several different feature types, each with a
different set of properties appropriate for a particular application. For a travel planning application, it can have
a limited set of attributes such as name, route number, location and number of lanes, while for a maintenance
application it can have an extensive set of attributes detailing the structure and composition of each of the layers
of material for which it is composed.
3.12
feature concept dictionary
dictionary that contains definitions of, and related descriptive information about, concepts that can be
specified in detail in a feature catalogue (3.10)
3.13
feature operation
operation that every instance of a feature (3.7) type may perform
EXAMPLE A feature operation upon a “dam” is to raise the dam. The results of this operation are to raise the
height of the “dam” and the level of water in a “reservoir”.
Note 1 to entry: The values of feature attributes of feature instances are affected by feature operations.
[SOURCE: ISO 19110:2016, 3.7 modified — Note 1 to entry has been changed.]
3.14
feature operation concept
concept that can be specified in detail as one or more feature operation (3.13) types
EXAMPLE A “traffic flow” operation can return the number of persons or vehicles expected to move on or
through some kind of transportation feature during a period of time specified as input to the operation.
3.15
hierarchical register
structured set of registers (3.19) for a domain of register items, composed of a principal register and a
set of subregisters (3.21)
EXAMPLE The ISO 6523 series is associated with a hierarchical register. The principal register contains
organization identifier schemes and each subregister contains a set of organization identifiers that comply with a
single organization identifier scheme.
[SOURCE: ISO 19135-1:2015, 4.1.4 modified — Example updated]
ISO 19126:2021(E)
3.16
identifier
linguistically independent sequence of characters capable of uniquely and permanently identifying that
with which it is associated
[SOURCE: ISO 19135-1:2015, 4.1.5]
3.17
item class
set of items with common properties
Note 1 to entry: Class is used in this context to refer to a set of instances, not the concept abstracted from that set
of instances.
Note 2 to entry: To avoid potential ambiguity in this document, the expression “register item class” is used.
[SOURCE: ISO 19135-1:2015, 4.1.7 modified — Note 2 to entry has been added.]
3.18
nominal value
name of an object, type, or category
EXAMPLE “Deciduous needle leaf” is a nominal value that identifies a vegetation type.
Note 1 to entry: Many feature attributes take nominal rather than numerical values. The value domain of such an
attribute is usually specified as an enumeration or a code list.
3.19
register
set of files containing identifiers (3.16) assigned to items with descriptions of the associated items
[SOURCE: ISO 19135-1:2015, 4.1.9]
3.20
registry
information system on which a register (3.19) is maintained
[SOURCE: ISO 19135-1:2015, 4.1.13]
3.21
subregister
part of a hierarchical register (3.15) that contains items from a partition of a domain of information
[SOURCE: ISO 19135-1:2015, 4.1.16]
3.22
value domain
set of accepted values
[SOURCE: ISO 19103:2015, 4.37 modified — The Example has been removed.]
4 Conformance
4.1 General
To conform to this document, all of the conditions specified for at least one of the two conformance
classes described in the following subclauses shall be satisfied.
4 © ISO 2021 – All rights reserved
ISO 19126:2021(E)
4.2 Conformance for a feature concept dictionary
Any feature concept dictionary that claims conformance to this document shall satisfy all of the
conditions specified in the following abstract test suites:
a) ISO 19135-1:2015, A.1, for general conformance to ISO 19135-1; and
b) Subclause A.2.
4.3 Conformance for a register of feature concept dictionaries and/or feature
catalogues
Any register of feature concept dictionaries and/or feature catalogues that claims conformance to this
document shall satisfy all of the conditions specified in the following abstract test suites:
a) ISO 19135-1:2015, A.1, for general conformance to ISO 19135-1;
b) ISO 19135-1:2015, A.3, for conformance to ISO 19135-1 as a hierarchical register; and
c) Subclause A.3.
5 Concepts
5.1 General
A feature concept dictionary describes concepts that can be used to characterize real-world phenomena.
Feature types and feature property types can then be specified using these concepts and documented
in a feature catalogue. This document specifies a feature concept dictionary schema (5.2 and Clause 6).
ISO 19135-1 specifies procedures to be followed in preparing and maintaining registers of items of
geographic information. Such registers can be used to support discovery of, access to, and use of the
contents of feature concept dictionaries and feature catalogues. This document specifies a schema for
feature concept dictionaries as registers and information that shall be included in item registration
proposals (Annex B).
A single authority may need to establish a suite of coordinated feature concept dictionary registers
and feature catalogue registers that share a common structure, coding scheme and/or community
of interest. This document specifies a compound registry mechanism to support such requirements
(5.3.3).
Feature concept dictionaries and feature catalogues maintained as registers may serve as sources of
reference for similar registers established by other geographic information communities as part of a
system of cross-referencing. Feature concept dictionary registers and feature catalogue registers from
different communities may be organized as partitions of a hierarchical register. Based on ISO 19135-1,
this document specifies a schema for a hierarchical register of feature concept dictionaries and feature
catalogues (5.5 and Clause 8) and information to be included in item registration proposals.
5.2 Feature concept dictionary
The set of concepts of a feature concept dictionary includes feature concepts, feature attribute concepts,
feature association concepts, feature operation concepts and nominal value concepts that may be
included in the value domain of a feature attribute concept. Feature types may then be specified using
these concepts and documented in a feature catalogue.
The schema presented in Clause 6 of this document provides a detailed specification of the content of
feature concept dictionaries.
ISO 19126:2021(E)
5.3 Registers
5.3.1 Overview
Registers provide a basis for the flexible management of items. Feature concept dictionaries and feature
catalogues managed as registers may be published electronically, enabling the discovery and direct
use of their contents. They can also be easily extended and used as a basis for harmonization and the
establishment of interoperability between different geographic information communities.
5.3.2 Register structure
ISO 19135-1 specifies several alternatives for structuring registers.
a) A simple register contains items of a single item class. This is the simplest structure to manage,
since the same elements of information are recorded for all items in the register, and it imposes a
smaller cost burden on any one register manager. A disadvantage, for any organization that wishes
to establish registers for multiple item classes, is that it may scatter such registers across several
register managers.
b) A multi-part register contains items from different item classes. It is organized into sections based
on the different elements of information recorded for each class. For example, a feature catalogue
that conforms to ISO 19110 may be instantiated as a multi-part register. Such a register would
include distinct item classes for feature types, for feature attributes, for feature associations, and
for feature operations.
c) A hierarchical register is a structured set of registers composed of a principal register and one or
more subregisters (ISO 19135-1:2015, Clause 8). The principal register holds a set of items that
describe the subregisters. Each of the subregisters holds a set of register items from a partition of
the information domain.
This document specifies schemas for both multi-part registers (feature concept dictionaries) and
hierarchical registers (registers of feature concept dictionaries and/or feature catalogues).
5.3.3 Compound registry
An authority can need to establish a suite of coordinated registers that share a common structure but
are separated into individual registers within a compound registry. A compound registry contains
several registers,
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...