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16 16  
17 17  The following are published on the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] website ([[__https:~~/~~/www.sdmx.org__>>https://https:www.sdmx.org]]):
18 18  
19 -**Section 1** **Framework for [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Technical Standards** – this document providing an introduction to the technical standards.
19 +**Section 1** **Framework for SDMX Technical Standards** – this document providing an introduction to the technical standards.
20 20  
21 -**Section 2** **[[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]]** - the [[SDMX information model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]] is a standardised object model for modelling [[statistical domains>>doc:sdmx:Glossary 2\.1.Statistical subject-matter domain.WebHome]] centring on the structure of their data and [[metadata sets>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]], the coding schemes used for [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]], and the rules for controlling the exchange of data and metadata between organisations. This document provides a UML specification with supporting narrative.
21 +**Section 2** **SDMX Information Model** - the [[SDMX information model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]] is a standardised object model for modelling [[statistical domains>>doc:sdmx:Glossary 2\.1.Statistical subject-matter domain.WebHome]] centring on the structure of their data and [[metadata sets>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]], the coding schemes used for [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]], and the rules for controlling the exchange of data and metadata between organisations. This document provides a UML specification with supporting narrative.
22 22  
23 -**Section 5** **[[SDMX Registry>>doc:sdmx:Glossary 2\.1.SDMX Registry.WebHome]] Specification** – an [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] ‘registry’ acts as a repository for [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] and provisioning information, and a registry of data and metadata sources. This document sets out the specification.
23 +**Section 5** **SDMX Registry Specification** – an [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] ‘registry’ acts as a repository for [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] and provisioning information, and a registry of data and metadata sources. This document sets out the specification.
24 24  
25 -**Section 6** **[[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Technical Notes** – detailed technical guidance for implementors of the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] standard.
25 +**Section 6** **SDMX Technical Notes** – detailed technical guidance for implementors of the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] standard.
26 26  
27 -The following are published on the GitHub repository of the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Standards Technical Working Group ([[__https:~~/~~/github.com/sdmx-twg__>>https://https:github.comsdmx-twg]]): [[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-rest – REST API
27 +The following are published on the GitHub repository of the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Standards Technical Working Group ([[__https:~~/~~/github.com/sdmx-twg__>>https://https:github.comsdmx-twg]]): sdmx-twg/sdmx-rest – REST API
28 28  
29 29  Technical specifications for the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] RESTful web services application programming interfaces (API).
30 30  
31 31  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-ml2013SDMX-ML" %)
32 -**[[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx-ml>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] – [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]]**
32 +**sdmx-twg/sdmx-ml – SDMX-ML**
33 33  Technical specifications for the XML transmission format including XSD schemas, documentation and samples for data, structure and [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] messages.
34 34  
35 35  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-json2013SDMX-JSON" %)
36 -**[[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx-json>>doc:sdmx:Glossary 2\.1.SDMX-JSON.WebHome]] – [[SDMX-JSON>>doc:sdmx:Glossary 2\.1.SDMX-JSON.WebHome]]**
36 +**sdmx-twg/sdmx-json – SDMX-JSON**
37 37  Technical specifications for the JSON transmission format including documentation, schemas and samples for data, structure and [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] messages.
38 38  
39 39  (% class="wikigeneratedid" id="Hsdmx-twg2Fsdmx-csv2013SDMX-CSV" %)
40 -**[[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx-csv>>doc:sdmx:Glossary 2\.1.SDMX-CSV.WebHome]] – [[SDMX-CSV>>doc:sdmx:Glossary 2\.1.SDMX-CSV.WebHome]]**
40 +**sdmx-twg/sdmx-csv – SDMX-CSV**
41 41  Technical specifications for the [[SDMX-CSV>>doc:sdmx:Glossary 2\.1.SDMX-CSV.WebHome]] transmission format for ‘comma-separated values’ (CSV) data and [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]].
42 42  
43 43  The following sections are obsolete:
44 44  
45 -Section 3 - [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] - replaced by the [[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx-ml>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] GitHub repository
45 +Section 3 - SDMX-ML - replaced by the sdmx-twg/sdmx-ml GitHub repository
46 46  
47 -Section 4 - [[SDMX-EDI>>doc:sdmx:Glossary 2\.1.SDMX-EDI.WebHome]]
47 +Section 4 - SDMX-EDI
48 48  
49 -Section 7 - API - replaced by the [[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-twg/[[sdmx>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-rest GitHub repository [[VTL>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]]
49 +Section 7 - API - replaced by the sdmx-twg/sdmx-rest GitHub repository [[VTL>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]]
50 50  
51 51  In July 2020 the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] 2.1 specifications were revised to add support for the [[Validation and Transformation Language>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]] ([[VTL>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]]). For 3.0, the [[VTL>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Structural metadata.WebHome]] [[artefacts>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]]. Section 2 (Information Model) sets out details of the ‘Transformation and Expressions’ package for defining and managing [[VTL>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]] 2.0 programs and Section 6 (Technical Notes) provides detailed guidance on implementing and using [[VTL>>doc:sdmx:Glossary 2\.1.Validation and transformation language.WebHome]] with [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]].
52 52  
53 53  = 2 Change History =
54 54  
55 -The 2.0 (% style="color:#e74c3c" %)version(%%) of this standard represented a significant increase in scope, and also provided more complete support in those areas covered in the (% style="color:#e74c3c" %)version(%%) 1.0 specification. (% style="color:#e74c3c" %)Version(%%) 2.0 of this standard is backward-compatible with (% style="color:#e74c3c" %)version(%%) 1.0, so that existing implementations can be easily migrated to conformance with (% style="color:#e74c3c" %)version(%%) 2.0.
55 +The 2.0 version of this standard represented a significant increase in scope, and also provided more complete support in those areas covered in the version 1.0 specification. Version 2.0 of this standard is backward-compatible with version 1.0, so that existing implementations can be easily migrated to conformance with version 2.0.
56 56  
57 -The 2.1 (% style="color:#e74c3c" %)version(%%) of this standard represents a set of changes resulting from several years of implementation experience with the 2.0 standard. The changes do not represent a major increase in scope or functionality, but do correct some bugs, and add functionalities in some cases. Major changes in [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] include a much stronger alignment of the XML Schemas with the Information Model, to emphasize inheritance and object-oriented features, and increased precision and flexibility in the attachment of metadata reports to specific objects in the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]].
57 +The 2.1 version of this standard represents a set of changes resulting from several years of implementation experience with the 2.0 standard. The changes do not represent a major increase in scope or functionality, but do correct some bugs, and add functionalities in some cases. Major changes in [[SDMX-ML>>doc:sdmx:Glossary 2\.1.SDMX-ML.WebHome]] include a much stronger alignment of the XML Schemas with the Information Model, to emphasize inheritance and object-oriented features, and increased precision and flexibility in the attachment of metadata reports to specific objects in the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]].
58 58  
59 -The 3.0 (% style="color:#e74c3c" %)version(%%) incorporates new features, improvements and changes arising from the collective knowledge gained from a decade of operating experience with the 2.1 standard. In pursuit of modernisation and simplification, features considered obsolete have been deprecated – in particular the EDI transmission format, the lesser-used XML data messages and the SOAP web services API. Many areas remain backwardly compatible with 2.1, but there are some breaking changes where the information model has been redesigned to better support practical use case. Structure mapping and [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] are examples. The opportunity has been taken to revise the RESTful web services API which is also not backwardly compatible, but benefits from a rationalisation and better organisations of resources, and a much richer data query URL syntax.
59 +The 3.0 version incorporates new features, improvements and changes arising from the collective knowledge gained from a decade of operating experience with the 2.1 standard. In pursuit of modernisation and simplification, features considered obsolete have been deprecated – in particular the EDI transmission format, the lesser-used XML data messages and the SOAP web services API. Many areas remain backwardly compatible with 2.1, but there are some breaking changes where the information model has been redesigned to better support practical use case. Structure mapping and [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] are examples. The opportunity has been taken to revise the RESTful web services API which is also not backwardly compatible, but benefits from a rationalisation and better organisations of resources, and a much richer data query URL syntax.
60 60  
61 -The 3.1 (% style="color:#e74c3c" %)version(%%) provides supports for data models to increase dimensionality over time without impacting existing data collections. The Data (% style="color:#e74c3c" %)Constraint(%%) model was adjusted to separate concerns of data reporting and data dissemination.
61 +The 3.1 version provides supports for data models to increase dimensionality over time without impacting existing data collections. The Data Constraint model was adjusted to separate concerns of data reporting and data dissemination.
62 62  
63 63  == 2.1 Major Changes from 1.0 to 2.0 ==
64 64  
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