EN ISO 19115-3:2023
(Main)Geographic information - Metadata - Part 3: XML schema implementation for fundamental concepts (ISO 19115-3:2023)
Geographic information - Metadata - Part 3: XML schema implementation for fundamental concepts (ISO 19115-3:2023)
This document defines an integrated XML implementation of ISO 19115-1 and ISO 19115-2 by defining the following artefacts:
— a set of XML schema required to validate metadata instance documents conforming to conceptual model elements defined in ISO 19115-1 and ISO 19115-2; and
— a set of ISO/IEC 19757-3 (Schematron) rules that implement validation constraints in the ISO 19115-1 and ISO 19115-2 UML models that are not validated by the XML schema.
This document describes the procedure used to generate XML schemas from ISO geographic information conceptual models related to metadata. The XML schemas are generated directly from the conceptual UML model (8.5).
Geoinformation - Metadaten - Teil 3: XML Implementierungsschema für Metadaten-Grundsätze (ISO 19115-3:2023)
Information géographique - Métadonnées - Partie 3 : Mise en oeuvre par des schémas XML (ISO 19115-3:2023)
Le présent document définit une implémentation XML intégrée des normes ISO 19115-1 et ISO 19115-2 en précisant les artefacts suivants:
— un ensemble de schémas XML requis pour valider les documents d'instance de métadonnées conformes aux éléments de modèle conceptuel définis dans l'ISO 19115-1 et l'ISO 19115-2; et
— un ensemble de règles basées sur l'ISO/IEC 19757-3 (Schematron) qui, dans les modèles UML de l'ISO 19115-1 et l'ISO 19115-2, implémentent des contraintes de validation qui ne sont pas validées par le schéma XML.
Le présent document décrit la procédure utilisée pour générer des schémas XML à partir de modèles ISO conceptuels d'information géographique. Les schémas XML sont générés directement à partir du modèle UML conceptuel (8.5).
Geografske informacije - Metapodatki - 3. del: Izvajanje sheme XML za temeljne koncepte (ISO/DIS 19115-3:2022)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 19115-3:2022
01-april-2022
Geografske informacije - Metapodatki - 3. del: Izvajanje sheme XML za temeljne
koncepte (ISO/DIS 19115-3:2022)
Geographic information - Metadata - Part 3: XML schema implementation for
fundamental concepts (ISO/DIS 19115-3:2022)
Geoinformation - Metadaten - Teil 3: XML Implementierungsschema für Metadaten-
Grundsätze (ISO/DIS 19115-3:2022)
Information géographique - Métadonnées - Partie 3 : Mise en oeuvre par des schémas
XML (ISO/DIS 19115-3:2022)
Ta slovenski standard je istoveten z: prEN ISO 19115-3
ICS:
07.040 Astronomija. Geodezija. Astronomy. Geodesy.
Geografija Geography
35.240.30 Uporabniške rešitve IT v IT applications in information,
informatiki, dokumentiranju in documentation and
založništvu publishing
35.240.70 Uporabniške rešitve IT v IT applications in science
znanosti
oSIST prEN ISO 19115-3:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 19115-3:2022
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oSIST prEN ISO 19115-3:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19115-3
ISO/TC 211 Secretariat: SIS
Voting begins on: Voting terminates on:
2022-01-27 2022-04-21
Geographic information — Metadata —
Part 3:
XML schema implementation for fundamental concepts
Information géographique — Métadonnées —
Partie 3: Mise en oeuvre par des schémas XML
ICS: 35.240.70
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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ISO/DIS 19115-3:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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.
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Contents Page
Foreword .iv
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.2
4.1 Acronyms . 2
4.2 Namespaces . 3
5 Conformance . 4
5.1 General . 4
5.2 Conformance classes for metadata modules . 6
5.3 Conformance classes for minimum metadata interchange documents . 11
6 Requirements .12
6.1 Introduction to requirements classes.12
6.2 Requirements for metadata modules .12
6.3 Requirements for metadata interchange documents . 24
6.4 Requirements dependency diagrams. 26
7 Design Goals and Implementation .26
7.1 Introduction to design goals and decisions . 26
7.2 Automated generation of XML schema . 26
7.3 Multilingual adaptability and polymorphism . 27
7.4 Core Decisions . 27
7.5 Extensions to the UML models in the ISO geographic information series of
International Standards for this schema .28
7.6 UML packages and XML namespaces .28
7.7 UML model for XML implementation .28
7.8 Implementation approach for decoupling XML packages .28
7.8.1 General .28
7.8.2 Implementation approach to decouple optional classes . 31
7.9 XML encoding rules . 33
7.10 Default values .34
Annex A (normative) Abstract and Executable test suite .35
Annex B (normative) Geographic metadata XML resources .52
Annex C (normative) Encoding descriptions.54
Annex D (informative) Implementation examples .56
Bibliography .57
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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.
This second edition cancels and replaces the first edition (ISO 19115-3:2016), which has been technically
revised.
The main changes are as follows:
— Update references to external standards:
— especially from ISO 19139:2007 to ISO 19139-1:2019 XML Implementation.
— Reallocating components to the relevant primary standards especially for ISO 19115-1:2014,
ISO 19115-2:2019 and ISO 19103:2015.
— Removal of additional Packages and namespaces that are derived by the aggregation of packages
defined in ISO 191115-1 and ISO 19115-2.
— Consolidation of tables to:
— reduce repetition of information;
— collocate information about requrements, conformance tests and clauses they refer to.
— Reordering of elements in the XML schemas for ISO 19115-1 and ISO 19115-2 has been undertaken to
align with the order of attributes in the associated data dictionaries. Appropriate XML style sheets
(XSLT) have been generated to assist in transformation XML records from records conforming
to previous versions of the schemas. The conceptual models in the HMMG have been augmented
to include the attribute ordering as set out in the data dictionaries in ISO 19115-1:2014 plus
amendments 1 and 2 and ISO 19115-2:2019.
A list of all parts in the ISO 19115 series can be found on the ISO website.
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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.
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Introduction
ISO 19115-1 explains the importance of metadata, specifies a model for describing geographic
information resources by defining metadata entities, elements and terminology, and establishing
an extension procedure for additional metadata content. ISO 19115-1:2014, Annex G describes the
revisions from ISO 19115:2003. The revised content model also incorporates metadata elements
defined in ISO 19119:2005 and ISO 19119:2005/Amd 1:2008 for metadata describing web services.
More detailed metadata for geographic data types and data quality are defined in other ISO geographic
information standards (e.g. ISO 19110 and ISO 19157). Where necessary, interpretations of some other
ISO geographic information standards are incorporated for this implementation.
ISO 19115-2 extends ISO 19115-1 by adding models for acquisition information and extending the models
for metadata (MD_Metadata), data quality (DQ_DataQuality, now in ISO 19157), spatial representation
(MD_SpatialRepresentation), and content information (MD_ContentInformation).
ISO 19115-1 and ISO 19115-2 define conceptual models for metadata content that are independent of
any particular encoding scheme. ISO/TS 19139-1 defines encoding rules for the generation of eXtensible
Markup Language (XML) schemas to encode that content. This document defines XML encodings
for ISO 19115-1 and ISO 19115-2 metadata content. The integratable schemas makes it possible to
use concepts from ISO 19115-1 and ISO 19115-2 together in metadata instance documents enabling
automated validation of ISO 19115-1 and ISO 19115-2 metadata content using standard software tools.
The integrated schemas have been derived from ISO 19115-1 and ISO 19115-2 conceptual models using
the rules defined in ISO/TS 19139-1:2019 applied to an adapted implementation-ready UML version of
the conceptual models as described in Clause 8. The implementation approach enables modularization
and eases reuse of elements of the conceptual models. Abstract classes were added to the ISO geographic
information harmonized model, without altering the semantics, to create an implementation model that
was used for this XML implementation (see Clause 8 for details).
The primary use case envisioned for this XML implementation is the exchange of geographic
metadata in a client-server environment exemplified by the World Wide Web, in which the internal
management and structure of metadata content is independent of the encoding used for exchange
of metadata information. Adoption of this geographic metadata XML schema within an information-
sharing community will garner the benefits of standardization for resource discovery, access, use, and
understanding.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 19115-3:2022(E)
Geographic information — Metadata —
Part 3:
XML schema implementation for fundamental concepts
1 Scope
This document defines an integrated XML implementation of ISO 19115-1 and ISO 19115-2 by defining
the following artefacts:
a) a set of XML schema required to validate metadata instance documents conforming to conceptual
model elements defined in ISO 19115-1 and ISO 19115-2; and
b) a set of ISO/IEC 19757-3 (Schematron) rules that implement validation constraints in the
ISO 19115-1 and ISO 19115-2 UML models that are not validated by the XML schema.
This document describes the procedure used to generate XML schemas from ISO geographic information
conceptual models related to metadata. The XML schemas are generated directly from the conceptual
UML model (Clause 6.2).
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 General title — Part #: Title of part
ISO 20##, General title — Part ##: Title of part
ISO 19103:2015, Geographic information — Conceptual schema language
ISO 19110:2016, Geographic information — Methodology for feature cataloguing
ISO 19115-1:2014, Geographic information — Metadata — Part 1: Fundamentals
ISO 19115-1:2014, Geographic information — Metadata — Part 1: Fundamentals
ISO 19115-1:2014, Geographic information — Metadata — Part 1: Fundamentals
ISO 19115-2:2019, Geographic information — Metadata — Part 2: Extensions for acquisition and processing
ISO 19115-2:2019, Geographic information — Metadata — Part 2: Extensions for acquisition and processing
ISO 19136-1:2020, Geographic information — Geography Markup Language (GML) — Part 1: Fundamentals
ISO 19157:2013, Geographic information — Data quality
ISO/TS 19139-1:2019, Geographic information — XML schema implementation — Part 1: Encoding rules
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
namespace
collection of names, identified by a URI reference, which are used in XML documents as element
names and attribute names
Note 1 to entry: The combination of a namespace URI and element or attribute name are intended to be a globally
unique identifier for that model element.
[SOURCE: W3C XML Namespaces: 1999]
3.2
package
general purpose mechanism for organizing elements into groups
EXAMPLE Identification information package, metadata entity set information package, constraint
information package.
Note 1 to entry: Packages may be nested within other packages. Both model elements and diagrams may appear
in a package.
Note 2 to entry: A package provides a namespace for the grouped elements.
[SOURCE: ISO 19103:2015, 4.27, modified — Examples and notes to entry have been added.]
3.3
polymorphism
characteristic of being able to assign a different meaning or usage to something in different contexts
– specifically, to allow an entity such as a variable, a function, or an object to have more than one form
Note 1 to entry: There are several different kinds of polymorphism.
[SOURCE: ISO/TS 19139-1:2019, 3.3]
3.4
realization
specialized abstraction relationship between two sets of model elements, one representing a
specification (the supplier) and the other representing an implementation of the latter (the client).
Note 1 to entry: Realization indicates inheritance of behaviour without inheritance of structure.
[SOURCE: UML 2 ]
4 Symbols and abbreviated terms
4.1 Acronyms
GML Geography Markup Language
HTML HyperText Markup Language
UML Unified Modeling Language
URI Universal Resource Identifier
URL Universal Resource Locator
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XML Extensible Markup Language
XPath XML Path Language
XSD XML Schema Definition
XSL Extensible Style Language
XSLT Extensible Stylesheet Language Transformation
4.2 Namespaces
XML namespaces defined in this document are identified by URIs that follow the pattern:
— https:// schemas .isotc211 .org/ sn/ -j/ xxx/ N .n, where sn is the ISO standard number, j is the part
number, xxx is a three-alphanumeric-character namespace abbreviation, and N is the edition number
and n is the version number (starting at 1). Dereferencing the namespace URI as a resource locator
will retrieve a description of the namespace, links to description of the content of the namespace,
and links to the base specification the namespace implements and to the normative XML schema
location.
Because the full URI is cumbersome for reading, writing, and in human discussion, this document
will refer to the namespaces using abbreviations. Table 1 lists namespaces from other specifications
imported by this implementation. Table 3 (Clause 5.2) lists abbreviations and other information for
namespaces used for UML packages defined in ISO 19115-1 and ISO 19115-2. Table 4 (Clause 5.3) lists
information for namespaces defined in this document that import multiple XML namespaces to define
interchange document types.
Table 1 — External namespace URIs and namespace abbreviation conventions used in this
document
Data Quality classes
UML Package From ISO 19157
Namespace name Data quality common
Namespace abreviation dqc
Namespace URI https:// schemas .isotc211 .org/ 19157/ -2/ dqc/ 1 .1
Feature Catalogue classes
UML Package From ISO 19110
Namespace name Feature catalogue common
Namespace abreviation fcc
Namespace URI https:// schemas .isotc211 .org/ 19110/ -/ fcc/ 2 .1
General Feature classes
UML Package From ISO 19110
Namespace name Feature catalogue common
Namespace abreviation gfc
Namespace URI https:// schemas .isotc211 .org/ 19110/ -/ gfc/ 2 .1
Geography Markup Language (GML) classes
UML Package From GML
Namespace name Geography markup language
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UML Package From ISO 19157
Namespace abreviation gml
Namespace URI http:// www .opengis .net/ gml/ 3 .2
XML Linking
UML Package From W3C
Namespace name XML linking language
Namespace abreviation xlink
Namespace URI http:// www .w3 .org/ 1999/ xlink
Schema Definition classes
UML Package From W3C
Namespace name W3C XML schema definition schema
Namespace abreviation Xs
Namespace URI http:// www .w3 .org/ 2001/ XMLSchema
Geospatial Common Type classes
UML Package From ISO 19103
Namespace name Geospatial Common Objects
Namespace abreviation gco
Namespace URI https:// schemas .isotc211 .org/ 19103/ -/ gco/ 1 .2
Geospatial Common Extended Type classes
UML Package From ISO 19103
Namespace name Geospatial Common objects eXtended
Namespace abreviation gcx
Namespace URI https:// schemas .isotc211 .org/ 19103/ -/ gcx/ 1 .2
Geography Markup Language Wrapper classes
UML Package From ISO 19136-1
Namespace name GML wrapper
Scope Namespace that implements properties with values specified by GML classes
Namespace abreviation gmw
Namespace URI https:// schemas .isotc211 .org/ 19136/ -1/ gmw/ 1 .1
5 Conformance
5.1 General
This document defines a mechanism by which an XML implementation can demonstrate conformance
1) 2)
to requirements in ISO 19115-1:2014 and ISO 19115-2:2019 . Neither of those standards explicitly
define requirements classes or specification targets. Each describes conformance requirements and
allows for “user-defined metadata” and “profiles”. Implicitly, this gives four requirements “super
1) Including Amendment 1:2018 and Amendment 2:2020
2) Including Amendment 1:2020
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classes” and three specification targets. ISO 19115-1 and ISO 19115-2 do not assign identifiers for these
3)
requirements classes; in this document, these identifiers are used:
Table 2 — ISO 19115-1 and ISO 19115-2 conformance classes without URIs
Conformance class Specification Dependency
target
Identifier
ISO 19115-1 https:// standards .iso .org/ Metadata instance
“base” ~iso19115/ -1/ 1/ clause #6
ISO 19115-1 https:// standards .iso .org/ ~ Metadata instance https:// standards .iso .org/ Re-used by
“user-defined ~iso19115/ -1/ 1/ clause #6 reference in
iso19115/-1/1/clause#C.4
extension” 19115-2
ISO 19115-2 https:// standards .iso .org/ ~ Metadata instance https:// standards .iso .org/
“acquisition ~iso19115/ -1/ 1/ clause #6
iso19115/-2/1/clause#5.1
base”
ISO 19115-1 https:// standards .iso .org/ Metadata https:// standards .iso .org/ Re-used by
“profile” ~iso19115/ -1/ 1/ clause #C .6 specification ~iso19115/ -1/ 1/ clause #6 reference in
(community, or 19115-2
Optionally: https://st andards. iso
other ISO/TC
.org/~ iso19115/-1 /1 /c lause#C .4
211 standard)
or “information
Optionally: https://st andards. iso
exchange” docu-
.org/~ iso19115/-2 /1 /c lause#5 .1
ment
NOTE “profile” includes importing e.g. citation into another ISO/TC 211 standard.
In order to conform to ISO 19115-1 or 19115-2, a metadata instance conforms to https:// standards
.iso .org/ iso19115/ -1/ 1/ clause #2 .1core and may conform to https:// standards .iso .org/ iso19115/ -1/ 1/
clause #2 .1user -defined and / or https:// standards .iso .org/ iso19115/ -2/ 1/ clause #5 .1. This document
describes how an XML encoded metadata instance can be shown to conform to those requirements.
Where a community profile constrains ISO 19115, an XML implementation schema may import some
modules from this document or may test those constraints using additional community-specific
Schematron rules. Where a community extends ISO 19115, it follows the rules in ISO 19115-1 Clause C.6;
the extensions should follow the rules in ISO 19115-1 Clause C.4. An XML implementation schema should
be generated that conforms to ISO 19139-1, in the same way that this document does.
Because of the modular nature of ISO 19115-1 and ISO 19115-2, each requirements “super class”
contains optional packages and elements. The overall requirements is that the metadata be provided as
specified. The actual requirements classes correspond to the clauses in the document and the packages
in the UML model. Following ISO 19139-1, each UML package results in a separate XML namespace.
This document lists 22 requirements classes for “metadata modules”, and seven for “metadata
interchange documents”.
ISO 19115-1 and ISO 19115-2 provide Abstract Test Suites; this document provides XML schema
documents and Schematron rules to facilitate an Executable Test Suite implementing those Abstract
Test Suites in the context of an XML implementation. In order to satisfy the one requirement of this
document, an XML instance need only validate against the XML schema and Schematron rules, as
described in Annex A.
Some of the requirements of ISO 19115-1 and ISO 19115-2 cannot be validated in this way; these are
listed in clause A.2.4.4. Other automatic or manual validation would be required for these requirements
of parts 1 and 2.
Implementers may choose to define other “information exchange” document schemas that import
normative XML schemas in addition to those specified here to identify and use them to validate
interchange documents. The design of these schemas will be contingent on the requirements of the
3) To be adjusted to the pattern HMMG confirm, which may be lodged as a comment to ISO/DIS 19105.
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user community for the particular information exchange. These information exchange schema should
be documented in a technical note.
5.2 Conformance classes for metadata modules
This document defines a set of XML schema and conformance classes for various content modules
defined by ISO 19115-1 and ISO 19115-2 to allow these to be used as components in other interchange
document implementations. Each module is packaged in a separate XML namespace. Tables 3 lists the
module defined in this document.
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Table 3 — Namespace URIs and namespace abbreviation used in this document for packages
defined in ISO 19115-1 and ISO 19115-2 and conformance classes defined for metadata modules
associated with those packages
Metadata Application classes
Source ISO 19115-1:2014 Clause 6.2
UML Package Metadata application information
Namespace name MetaData Application
Scope Includes classes for describing resource collections with hierarchical metadata.
Namespace abreviation mda
Namespace URI https:// schemas .isotc211 .org/ 19115/ -1/ mda/ 1 .3
Conformance class URI https:// standards .iso .org/ iso19115/ -1/ 1/ conf/ metadata -applic
...
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