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Last modified by Artur on 2025/09/10 11:19
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To version 3.11
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1 -Methodology.WebHome
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15 15  = {{id name="_Toc38908"/}}1. Introduction =
16 16  
17 -The [[Statistical Data and Metadata Exchange>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] ([[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]) initiative (http:~/~/www.[[sdmx>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]].org) sets standards that can facilitate the exchange of statistical data and metadata using modern information technology, with an emphasis on aggregated data.
17 +The Statistical Data and Metadata Exchange (SDMX) initiative (http:~/~/www.sdmx.org) sets standards that can facilitate the exchange of statistical data and metadata using modern information technology, with an emphasis on aggregated data.
18 18  
19 -There are several sections to the [[SDMX Technical Specification>>doc:sdmx:Glossary.SDMX Technical Specification.WebHome]]:
19 +There are several sections to the SDMX Technical Specification:
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21 -1. [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] Framework Document – this document. The purpose of this document is to introduce [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] and its scope. This document will be revised in due course to include the conformance requirements.
22 -1. The [[SDMX Information Model>>doc:sdmx:Glossary.SDMX Information Model.WebHome]] - the information model on which syntaxspecific implementations described in the other sections are based. This is intended for technicians wishing to understand the complete scope of the technical standards in a syntax-neutral form. It includes as an annex a tutorial on UML (Unified Modelling Language). This document is not normative.
23 -1. [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]-EDI - the UN/EDIFACT format for exchange of [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]-structured data and metadata. This document contains normative sections describing the use of the UN/EDIFACT syntax in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] messages. This document has normative sections.
24 -1. [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]-ML - the XML format for the exchange of [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]]-structured data and metadata. This document has normative sections describing the use of the XML syntax in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] messages, and is accompanied by a set of normative XML schemas and non-normative sample XML document instances.
25 -1. The [[SDMX Registry>>doc:sdmx:Glossary.SDMX Registry.WebHome]] Specification provides for a central registry of information about available data and [[reference metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]], and for a repository containing [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]] and provisioning information. This specification defines the basic services offered by the [[SDMX Registry>>doc:sdmx:Glossary.SDMX Registry.WebHome]]: registration of data and metadata; querying for data and metadata; and [[subscription>>doc:sdmx:Glossary.Subscription.WebHome]]/[[notification>>doc:sdmx:Glossary.Notification.WebHome]] regarding updates to the registry. This document has normative sections.
26 -1. The [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] Technical Notes – this is a guide to help those who wish to use the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] specifications. It includes notes on the expressive differences of the various messages and syntaxes; versioning; [[maintenance agencies>>doc:sdmx:Glossary.Maintenance agency.WebHome]]; the [[SDMX Registry>>doc:sdmx:Glossary.SDMX Registry.WebHome]]. This document is not normative.
27 -1. Web Services Guidelines – this is a guide for those who wish to implement [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] using web-services technologies. It places an emphasis on those aspects of web-services technologies (including, but not requiring, an SDMXconformant registry) which will work regardless of the development environment or platform used to create the web services. This document contains normative sections.{{footnote}}SOAP and REST specifications are not maintained any more in this section, see the SDMX website.{{/footnote}}
21 +1. SDMX Framework Document – this document. The purpose of this document is to introduce SDMX and its scope. This document will be revised in due course to include the conformance requirements.
22 +1. The SDMX Information Model - the information model on which syntaxspecific implementations described in the other sections are based. This is intended for technicians wishing to understand the complete scope of the technical standards in a syntax-neutral form. It includes as an annex a tutorial on UML (Unified Modelling Language). This document is not normative.
23 +1. SDMX-EDI - the UN/EDIFACT format for exchange of SDMX-structured data and metadata. This document contains normative sections describing the use of the UN/EDIFACT syntax in SDMX messages. This document has normative sections.
24 +1. SDMX-ML - the XML format for the exchange of SDMX-structured data and metadata. This document has normative sections describing the use of the XML syntax in SDMX messages, and is accompanied by a set of normative XML schemas and non-normative sample XML document instances.
25 +1. The SDMX Registry Specification provides for a central registry of information about available data and reference metadata, and for a repository containing structural metadata and provisioning information. This specification defines the basic services offered by the SDMX Registry: registration of data and metadata; querying for data and metadata; and subscription/notification regarding updates to the registry. This document has normative sections.
26 +1. The SDMX Technical Notes – this is a guide to help those who wish to use the SDMX specifications. It includes notes on the expressive differences of the various messages and syntaxes; versioning; maintenance agencies; the SDMX Registry. This document is not normative.
27 +1. Web Services Guidelines – this is a guide for those who wish to implement SDMX using web-services technologies. It places an emphasis on those aspects of web-services technologies (including, but not requiring, an SDMXconformant registry) which will work regardless of the development environment or platform used to create the web services. This document contains normative sections.{{footnote}}SOAP and REST specifications are not maintained any more in this section, see the SDMX website.{{/footnote}}
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29 -In July 2020 it was released an important improvement of the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 specifications for the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] implementation of the [[Validation and Transformation Language>>doc:sdmx:Glossary.Validation and transformation language.WebHome]] ([[VTL>>doc:sdmx:Glossary.Validation and transformation language.WebHome]]). This implied a revision of some of the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 sections. The relevant changes are not described in the next section but in the section 10 below.
29 +In July 2020 it was released an important improvement of the SDMX 2.1 specifications for the SDMX implementation of the Validation and Transformation Language (VTL). This implied a revision of some of the SDMX 2.1 sections. The relevant changes are not described in the next section but in the section 10 below.
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31 -Please note also that the SOAP and REST specifications are not maintained any more in the section 7 (Web Service Guidelines), the link to these specifications can be found on the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] website
31 +Please note also that the SOAP and REST specifications are not maintained any more in the section 7 (Web Service Guidelines), the link to these specifications can be found on the SDMX website
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33 33  = {{id name="_Toc38909"/}}2. Changes from Previous Version =
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286 286  The new SDMX 2.1 parts relevant to VTL are in Section 2 (Information Model), Section 3A (SDMX-ML: XML formats), Section 3B (SDMX-ML: XML Schema, Samples, WADL and WSDL), Section 5 (Registry Specifications), Section 6 (Technical Notes) and in the REST specifications of the SDMX web services. On the contrary, the VTL is not supported in the UN/EDIFACT SDMX formats (Section 4) and in the SDMX SOAP web service interface.
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288 -As for the Section 2 (Information Model), the change is relevant to the package 13 “Transformations and Expressions”, which previously contained only a blueprint for future elaboration and was not operational. This package is renamed to “Validation and Transformation Language” and is completely reformulated by introducing the actual object classes needed to define and manage VTL 2.0 programs. The other parts of the IM are not impacted.
288 +As for the Section 2 (Information Model), the change is relevant to the package 13
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290 +“Transformations and Expressions”, which previously contained only a blueprint for future elaboration and was not operational. This package is renamed to “Validation and Transformation Language” and is completely reformulated by introducing the actual object classes needed to define and manage VTL 2.0 programs. The other parts of the IM are not impacted.
291 +
290 290  In the Section 3A and 3B, new schemas, samples and documentation aimed at exchanging VTL programs through SDMX structure messages have been introduced. Other parts are not impacted.
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292 292  In the section 5 (Registry Specifications), the VTL artefacts have been added. The other artefacts are not impacted.
SUZ.Methodology.Code.MethodologyClass[0]