ISO
ISO TC 211 Geographic information/Geomatics Committee site

XML schema representations of geographic technology standards

Metadata with Schema Extensions (MEX)

Metadata with Schema Extensions (MEX) Version: 1.3

UML diagram of Metadata EXtension classes in the mex namespace
Figure 1. Classes in the mex namespace
UML diagram of Metadata Extension codelists in the mex namespace
Figure 2. Code list(s) in the mex namespace

Description

MEX 1.3 is an XML Schema implementation derived from ISO 19115-1, Geographic Information - Metadata - Part 1: Fundamentals, Clause 6.5.12. It includes elements describing extensions to metadata standards. The XML schema was encoded using the rules described in ISO/TS 19139:2007.

XML Namespace for mex 1.3

The namespace URI for mex 1.3 is https://schemas.isotc211.org/19115/-1/mex/1.3.

XML Schema for mex 1.3

mex.xsd is the XML Schema document to be referenced by XML documents containing XML elements in the mex 1.3 namespace or by XML Schema documents importing the mex 1.3 namespace. This XML schema includes (indirectly) all the implemented concepts of the mex namespace, but it does not contain the declaration of any types.

metadataExtension.xsd implements the UML conceptual schema defined in ISO 19115-1, Geographic Information - Metadata - Part 1: Fundamentals, Clause 6.5.12. It was created using the encoding rules defined in ISO 19118, ISO 19139ISO 19139.

https://schemas.isotc211.org/19115/-1/mex/1.3.0/metadataExtension.xsd contains the following classes:

  • MD_MetadataExtensionInformation

  • MD_ExtendedElementInformation

https://schemas.isotc211.org/19115/-1/mex/1.3.0/metadataExtension.xsd contains reference to the following codelists:

  • MD_DatatypeCode

  • MD_ObligationCode

The mex 1.3 namespace imports these other namespaces:

Name Standard Prefix Namespace Location Schema Location

Geographic Common Objects

gco

https://schemas.isotc211.org/19103/-/gco/1.2.0

gco.xsd

Metadata Common Classes

mcc

https://schemas.isotc211.org/19115/-1/mcc/1.3.0

mcc.xsd

CITation and Responsibility

cit

https://schemas.isotc211.org/19115/-1/cit/1.3.0

cit.xsd

Schematron Validation Rules for mex 1.3

Schematron rules for validating instance documents required for a complete validation are:

Package name File name Location Constraint tested

Metadata EXtension

mex.sch

https://schemas.isotc211.org/19115/-1/mex/1.3.0/mex.sch

  • MD_ExtendedElementInformation - if dataType notEqual codelist, enumeration, or codelistElement, then obligation, max imumOccurence and domainValue are mandatory

  • MD_ExtendedElementInformation - if obligation = conditional then condition is mandatory

  • MD_ExtendedElementInformation - if dataType = codelistElement, enumeration, or codelist then code is mandatory

  • MD_ExtendedElementInformation - if dataType = codelistElement, enumeration, or codelist then conceptName is mandatory

  • MD_ExtendedElementInformation - if dataType = codelist, enumeration, or codelistElement then name is not used

CITation and responsibility

cit.sch

https://schemas.isotc211.org/19115/-1/cit/1.3.0/cit.sch

  • CI_Individual - count(name + positionName) \> 0

  • CI_organisation - count(name + logo) \> 0

Schematron Validation Rules for mex 1.3

Schematron rules for validating instance documents of the mex 1.3 namespace are in mex.sch. Other schematron rule sets that are

Working Versions

When revisions to these schema become necessary, they will be managed in the ISO TC211 Git Repository.