Hierarchy

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Revision as of 02:48, 1 September 2022 by Vmurrell (talk | contribs) (Structure Properties)
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Overview

Hierarchys are a separate structure used for describing complex hierarchies of codes, potentially including codes from multiple different codelists. Software tools designed for users to explore and search a catalogue of data sets typically use a Hierarchical Codelists to display a tree structure much like Windows File Explorer.

In SDMX 2.1, Hierarchy Codelists do not explicitly link to any other structures like Dataflows. As such, the result of a user choosing a code is left entirely to the designers of the tools.

The principal features of the Hierarchy Codelists' are:

  • A child code can have more than one parent.
  • There can be more than one code that has no parent (known as Root codes in the Registry).
  • There may be many hierarchies (or “views”) defined, in terms of the associations between the codes. Each hierarchy serves a particular purpose in the reporting, analysis, or dissemination of data.
  • The levels in a hierarchy can be explicitly defined or they can be implicit: (i.e., they exist only as parent/child relationships in the coding structure).

Structure Properties

Structure Type Standard SDMX Structural Metadata Artefact
Maintainable Yes
Identifiable Yes
Item Scheme Yes
SDMX Information Model Versions 3.0
URN - Codelist namespace urn:sdmx:org.sdmx.infomodel.codelist.Hierarchy

Context within the SDMX 3.0 Information Model

Heirarchy

Usage

Conventions