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Summary

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1 -Artefact|Metadata set|Reference metadata|SDMX Information Model|SDMX Technical Specification|SDMX-JSON|SDMX-ML|Statistical data and metadata exchange|Statistical subject-matter domain|Structural metadata|Validation and transformation language
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11 11  
12 12  = 1 Introduction =
13 13  
14 -The [[Statistical Data and Metadata Exchange>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] ([[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]) initiative (https:~/~/www.[[sdmx>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]].org) sets 3 standards that can facilitate the exchange of statistical data and metadata using modern 4 information technology.
14 +The Statistical Data and Metadata Exchange (SDMX) initiative (https:~/~/www.sdmx.org) sets 3 standards that can facilitate the exchange of statistical data and metadata using modern 4 information technology.
15 15  
16 -The [[SDMX Technical Specifications>>doc:xwiki:Glossary.SDMX Technical Specification.WebHome]] are organised into several discrete sections.
16 +The SDMX Technical Specifications are organised into several discrete sections.
17 17  
18 -The following are published on the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] website
18 +The following are published on the SDMX website ([[__https:~~/~~/www.sdmx.org__>>https://https:www.sdmx.org]]).
19 19  
20 -([[__https:~~/~~/www.sdmx.org__>>https://https:www.sdmx.org]]).
21 -
22 22  **Section 1** **Framework for SDMX Technical Standards** – this document providing an introduction to the technical standards.
23 23  
24 -**Section 2** **SDMX Information Model** -
22 +**Section 2** **SDMX Information Model** - the SDMX information model is a standardised object model for modelling statistical domains centring on the structure of their data and metadata sets, the coding schemes used for classification, and the rules for controlling the exchange of data and metadata between organisations. This document provides a UML specification with supporting narrative.
25 25  
26 -the [[SDMX information model>>doc:xwiki:Glossary.SDMX Information Model.WebHome]] is a standardised object model for modelling [[statistical domains>>doc:xwiki:Glossary.Statistical subject-matter domain.WebHome]] centring on the structure of their data and [[metadata sets>>doc:xwiki:Glossary.Metadata set.WebHome]], the coding schemes used for classification, and the rules for controlling the exchange of data and metadata between organisations. This document provides a UML specification with supporting narrative.
24 +**Section 5** **SDMX Registry Specification** – an SDMX ‘registry’ acts as a repository for structural metadata and provisioning information, and a registry of data and metadata sources. This document sets out the specification.
27 27  
28 -**Section 5** **SDMX Registry Specification** – an [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] ‘registry’ acts as a repository for [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] and provisioning information, and a registry of data and metadata sources. This document sets out the specification.
26 +**Section 6** **SDMX Technical Notes** – detailed technical guidance for implementors of the SDMX standard.
29 29  
30 -**Section 6** **SDMX Technical Notes** – detailed technical guidance for implementors of the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] standard.
28 +The following are published on the GitHub repository of the SDMX Standards Technical Working Group (__[[https:~~/~~/github.com/sdmx-twg>>https://github.com/sdmx-twg]]__):
31 31  
32 -The following are published on the GitHub repository of the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] Standards Technical Working Group ([[__https:~~/~~/github.com/sdmx-twg__>>https://https:github.comsdmx-twg]]):
33 -
34 34  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-rest2013RESTAPI" %)
35 35  **sdmx-twg/sdmx-rest – REST API**
36 36  
37 -Technical specifications for the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] RESTful web services application programming interfaces (API).
33 +Technical specifications for the SDMX RESTful web services application programming interfaces (API).
38 38  
39 39  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-ml2013SDMX-ML" %)
40 -**sdmx-twg/sdmx-ml – [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]]**
36 +**sdmx-twg/sdmx-ml – SDMX-ML**
41 41  
42 -Technical specifications for the XML transmission format including XSD schemas, documentation and samples for data, structure and [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] messages.
38 +Technical specifications for the XML transmission format including XSD schemas, documentation and samples for data, structure and reference metadata messages.
43 43  
44 44  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-json2013SDMX-JSON" %)
45 -**sdmx-twg/sdmx-json – [[SDMX-JSON>>doc:xwiki:Glossary.SDMX-JSON.WebHome]]**
41 +**sdmx-twg/sdmx-json – SDMX-JSON**
46 46  
47 -Technical specifications for the JSON transmission format including documentation, schemas and samples for data, structure and [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] messages.
43 +Technical specifications for the JSON transmission format including documentation, schemas and samples for data, structure and reference metadata messages.
48 48  
49 49  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-csv2013SDMX-CSV" %)
50 -**sdmx-twg/sdmx-csv – [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-CSV**
46 +**sdmx-twg/sdmx-csv – SDMX-CSV**
51 51  
52 -Technical specifications for the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-CSV transmission format for ‘comma-separated values’ (CSV) data and [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]].
48 +Technical specifications for the SDMX-CSV transmission format for ‘comma-separated values’ (CSV) data and reference metadata.
53 53  
54 54  The following sections are obsolete:
55 55  
56 -Section 3 - [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] - replaced by the [[sdmx>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx-ml>>doc:xwiki:Glossary.SDMX-ML.WebHome]] GitHub repository
52 +Section 3 - SDMX-ML - replaced by the sdmx-twg/sdmx-ml GitHub repository
57 57  
58 -Section 4 - [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-EDI
54 +Section 4 - SDMX-EDI
59 59  
60 -Section 7 - API - replaced by the [[sdmx>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-rest GitHub repository [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]]
56 +Section 7 - API - replaced by the sdmx-twg/sdmx-rest GitHub repository VTL
61 61  
62 -In July 2020 the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 specifications were revised to add support for the [[Validation and Transformation Language>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] ([[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]]). For 3.0, the [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] specification has been updated to align with changes to the information model and other modifications to the Standard such as the introduction of Semantic Versioning for the versioning of [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]]. Section 2 (Information Model) sets out details of the ‘Transformation and Expressions’ package for defining and managing [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] 2.0 programs and Section 6 (Technical Notes) provides detailed guidance on implementing and using [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] with [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]].
58 +In July 2020 the SDMX 2.1 specifications were revised to add support for the Validation and Transformation Language (VTL). For 3.0, the VTL specification has been updated to align with changes to the information model and other modifications to the Standard such as the introduction of Semantic Versioning for the versioning of structural metadata artefacts. Section 2 (Information Model) sets out details of the ‘Transformation and Expressions’ package for defining and managing VTL 2.0 programs and Section 6 (Technical Notes) provides detailed guidance on implementing and using VTL with SDMX.
63 63  
64 64  = 2 Change History =
65 65  
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93 93  
94 94  SDMX version 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
95 95  
96 -(% class="wikigeneratedid" id="HInformationModel" %)
97 -**Information Model**
92 +=== Information Model ===
98 98  
99 99  * Simplification and improvement of the reference metadata model
100 100  * Support for microdata
... ... @@ -104,13 +104,11 @@
104 104  * Improvements to code hierarchies for data discovery
105 105  * Improvements to constraints
106 106  
107 -(% class="wikigeneratedid" id="HVersioningofStructuralMetadataArtefacts" %)
108 -**Versioning of Structural Metadata Artefacts**
102 +=== Versioning of Structural Metadata Artefacts ===
109 109  
110 110  * Adoption of the three-number semantic versioning standard for structural metadata artefacts (__[[https:~~/~~/semver.org>>url:https://semver.org/]])__
111 111  
112 -(% class="wikigeneratedid" id="HRESTWebServicesApplicationProgrammingInterface28API29" %)
113 -**REST Web Services Application Programming Interface (API)**
106 +=== REST Web Services Application Programming Interface (API) ===
114 114  
115 115  * Change to a single ‘structure’ resource for structure queries simplifying the REST API specification by reducing the number of resources to five
116 116  * Improvements to data queries
... ... @@ -117,13 +117,11 @@
117 117  * Improvements to reference metadata queries
118 118  * Support for structural metadata maintenance using HTTP PUT, POST and DELETE verbs
119 119  
120 -(% class="wikigeneratedid" id="HSOAPWebServicesAPI" %)
121 -**SOAP Web Services API**
113 +=== SOAP Web Services API ===
122 122  
123 123  * The SOAP web services API has been deprecated with version 3.0 standardising on REST
124 124  
125 -(% class="wikigeneratedid" id="HXML2CJSON2CCSVandEDITransmissionformats" %)
126 -**XML, JSON, CSV and EDI Transmission formats**
117 +=== XML, JSON, CSV and EDI Transmission formats ===
127 127  
128 128  * The SDMX-ML, SDMX-JSON and SDMX-CSV specifications have been extended and modified where needed to support the new features and changes such as reference metadata and microdata
129 129  * Obsolete SDMX-ML data message variants including Generic, Compact, Utility and Cross-sectional have been deprecated standardising on Structure Specific Data as the sole XML format for data exchange