A standard set of identifiers created for the many terminologies, code systems and other namespaces used to represent people, places and things in the digital health ecosystem.

Some important examples are the namespaces associated with:

  • SNOMED CT – the international system of terminology for health and social care
  • New Zealand Medicines Terminology – representing the medicines we use
  • National Health Index (NHI) number – identifying patients and health service users
  • Health Provider Index (HPI) identifiers – identifying health workers, organisations and facilities
  • Ethnic group codes – used when recording ethnicity.


Information technology — Metadata registries (MDR) — Part 5: Naming principles

Provides instructions for naming of the following items, as defined in ISO/IEC 1179-3 concept, data element concept, conceptual domain, data element, and value domain. ISO/IEC 11179-5:2015 describes naming in a metadata registries (MDR); includes principles and rules by which naming conventions can be developed; and provides examples of naming conventions.

Information technology - Metadata registries (MDR) - Part 1: Framework

ISO/IEC 11179-1:2015 provides the means for understanding and associating the individual parts of ISO/IEC 11179 and is the foundation for a conceptual understanding of metadata and metadata registries.

Information technology — Metadata registries (MDR) — Part 3: Registry metamodel and basic attributes

ISO/IEC 11179-3:2013 specifies the structure of a metadata registry in the form of a conceptual data model.

Information technology — Metadata registries (MDR) — Part 4: Formulation of data definitions

ISO/IEC 11179-4:2004 specifies requirements and recommendations for constructing definitions for data and metadata.



Pātiki and Waharua Kōpito patterns

Standards New Zealand

Improving standards for a better New Zealand