Data Quality Measures (DQM) is an XML Schema implementation of abstract classes for ISO 19157, Geographic Information - Data Quality. It includes elements for defining geometry and functions for coverages. The XML schema was encoded using the encoding rules defined in ISO 19118, ISO 19139.

The namespace URI for Data Quality [abstract classes] (DQM) Version 1.2.0 is https://schemas.isotc211.org/19157/-/dqm/1.2.

dqm.xsd is the XML Schema document to be referenced by XML documents containing XML elements in the dqm namespace or by XML Schema documents importing the dqm 1.2 namespace. This XML schema includes (indirectly) all the implemented concepts of the dqm namespace, but it does not contain the declaration of any types.

https://schemas.isotc211.org/19157/-/dqm/1.2.0/qualityMeasures.xsd implements the UML conceptual schema defined in ISO 19157, Geographic Information - Data Quality. It was created using the encoding rules defined in ISO 19118, ISO 19139.

https://schemas.isotc211.org/19157/-/dqm/1.2.0/qualityMeasures.xsd contains the following classes:

The DQM 1.2.0 imports these other namespaces:

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