Difference between revisions of "Data Structure Definition"
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<p>The schematic illustrates the core artefacts of the SDMX 2.1 Information Model, and how Codelists and Codes fit in.</p> | <p>The schematic illustrates the core artefacts of the SDMX 2.1 Information Model, and how Codelists and Codes fit in.</p> | ||
Revision as of 05:43, 19 December 2019
Contents
Overview
An SDMX Data Structure Definition (DSD) describes the structure of a dataset in terms of its dimensions, attributes and measures.
Structure Properties
| Structure Type | Standard SDMX Structural Metadata Artefact |
|---|---|
| Maintainable | Yes |
| Identifiable | Yes |
| Item Scheme | No |
| SDMX Information Model Versions | 1.0, 2.0, 2.1 |
| Concept ID | DSD |
Context within the SDMX 2.1 Information Model
The schematic illustrates the core artefacts of the SDMX 2.1 Information Model, and how Codelists and Codes fit in.
Codelists can be referenced directly by Data Structure Definitions (DSD), or indirectly through Concepts to explictly define the set of legal values for enumerated Dimensions or Attributes.
Usage
SDMX Codelists are lists of classification codes used principally for defining the set of allowed values for enumerated Components in Data Structure Definitions (DSDs) or Metadata Structure Definitions which describe Reference Metadata.
Each code is a separate Item so must have an ID and a Name, but can also have an optional Description. While Code IDs must be unique within a Codelist, the same Code ID may be safely used in other Codelists. For instance: The code 'A' may be used in a Frequency Codelist to represent 'Annual', but also appear in an Industry Codelist to represent 'Agriculture'.
