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Last modified by Artur on 2025/09/10 11:19
From version 11.2
edited by Elena
on 2025/06/17 16:45
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To version 7.1
edited by Helena
on 2025/05/22 15:00
Change comment: There is no comment for this version

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1 -xwiki:XWiki.elenasemanticproorg
1 +xwiki:XWiki.helena
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1 -Artefact|Attribute|Category|Category scheme|Code|Code list|Comment|Concept scheme|Cross-domain concept|Data consumer|Data provider|Data set|Data source|Data structure definition|Dataflow|Dimension|Hierarchical code list|Hierarchy|Incremental update|Item scheme|Maintenance agency|Measure|Metadata repository|Metadata set|Metadata structure definition|Metadataflow|Notification|Provision agreement|Reference metadata|Release policy - release calendar|Representation|SDMX Information Model|SDMX Registry|SDMX Technical Specification|SDMX-EDI|SDMX-ML|Statistical data and metadata exchange|Statistical subject-matter domain|Structural metadata|Structure set|Subscription|Time period|Timeliness|Validation and transformation language
Content
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12 12  Added the Section 10 –Validation and Transformation Language (VTL(% style="background-color:transparent" %))
13 13  )))
14 14  
15 -= Introduction =
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.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>>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.
18 18  
19 19  There are several sections to the [[SDMX Technical Specification>>doc:sdmx:Glossary.SDMX Technical Specification.WebHome]]:
20 20  
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30 30  
31 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
32 32  
33 -= Changes from Previous Version =
33 += {{id name="_Toc38909"/}}2. Changes from Previous Version =
34 34  
35 -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.
35 +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.
36 36  
37 -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.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.SDMX Information Model.WebHome]].
37 +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.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.SDMX Information Model.WebHome]].
38 38  
39 -Note that the idea of backward-compatibility in the standards is based on the information model. In both releases, some non-backward-compatible changes have been made to the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] formats. The same set of information required to use version 1.0 of the specification will permit the use of the same features in the version 2.0 specifications, however. Thus, a [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] is easily translated from version 1.0 to version 2.0, without requiring any new information regarding structures, etc. There have been no changes to the [[SDMX-EDI>>doc:sdmx:Glossary.SDMX-EDI.WebHome]] format.
39 +Note that the idea of backward-compatibility in the standards is based on the information model. In both releases, some non-backward-compatible changes have been made to the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] formats. The same set of information required to use (% style="color:#e74c3c" %)version(%%) 1.0 of the specification will permit the use of the same features in the (% style="color:#e74c3c" %)version(%%) 2.0 specifications, however. Thus, a [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] is easily translated from (% style="color:#e74c3c" %)version(%%) 1.0 to (% style="color:#e74c3c" %)version(%%) 2.0, without requiring any new information regarding structures, etc. There have been no changes to the [[SDMX-EDI>>doc:sdmx:Glossary.SDMX-EDI.WebHome]] format.
40 40  
41 41  The major changes from 1.0 to 2.0 can be briefly summarized:
42 42  
43 -* **[[Reference Metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]]**: In addition to describing and specifying data structures and formats (along with related [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]]), the version 2.0 specification also provides for the exchange of metadata which is distinct from the [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]] in the 1.0 version. This [[category>>doc:sdmx:Glossary.Category.WebHome]] includes “reference” metadata (regarding data quality, methodology, and similar types – it can be configured by the user to include whatever [[concepts>>doc:sdmx:Glossary.Concept.WebHome]] require reporting); metadata related to data provisioning ([[release calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]] information, description of the data and metadata provided, etc.); and metadata relevant to the exchange of categorization schemes.
44 -* **SDMX Registry**: Provision is made in the 2.0 standard for standard communication with registry services, to support a data-sharing model of statistical exchange. These services include registration of data and metadata, querying of registered data and metadata, and [[subscription>>doc:sdmx:Glossary.Subscription.WebHome]]/notification.
43 +* **[[Reference Metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]]**: In addition to describing and specifying data structures and formats (along with related [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]]), the (% style="color:#e74c3c" %)version(%%) 2.0 specification also provides for the exchange of metadata which is distinct from the [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]] in the 1.0 (% style="color:#e74c3c" %)version(%%). This [[category>>doc:sdmx:Glossary.Category.WebHome]] includes “reference” metadata (regarding data quality, methodology, and similar types – it can be configured by the user to include whatever (% style="color:#e74c3c" %)concepts(%%) require reporting); metadata related to data provisioning ([[release calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]] information, description of the data and metadata provided, etc.); and metadata relevant to the exchange of categorization schemes.
44 +* **[[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] Registry**: Provision is made in the 2.0 standard for standard communication with registry services, to support a data-sharing model of statistical exchange. These services include registration of data and metadata, querying of registered data and metadata, and [[subscription>>doc:sdmx:Glossary.Subscription.WebHome]]/notification.
45 45  * **[[Structural Metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]]**: The support for exchange of statistical data and related [[structural metadata>>doc:sdmx:Glossary.Structural metadata.WebHome]] has been expanded. Some support is provided for qualitative data; data cube structures are described; [[hierarchical code lists>>doc:sdmx:Glossary.Hierarchical code list.WebHome]] are supported; relationships between data structures can be expressed, providing support for extensibility of data structures; and the description of functional dependencies within cubes are supported.
46 46  
47 47  The major changes from 2.0 to 2.1 can be briefly summarized:
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151 151  * //**Process:**// The process class provides a way to model statistical processes as a set of interconnected //process steps.// Although not central to the exchange and dissemination of statistical data and metadata, having a shared description of processing allows for the interoperable exchange and dissemination of [[reference metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] sets which describe processes-related (% style="color:#e74c3c" %)concepts(%%).
152 152  * //**[[Hierarchical Code List>>doc:sdmx:Glossary.Hierarchical code list.WebHome]]:**// This supports the specification of [[code>>doc:sdmx:Glossary.Code.WebHome]] [[hierarchies>>doc:sdmx:Glossary.Hierarchy.WebHome]]. The [[codes>>doc:sdmx:Glossary.Code.WebHome]] themselves are referenced from the [[code lists>>doc:sdmx:Glossary.Code list.WebHome]] in which they are maintained. The [[Hierarchical Code List>>doc:sdmx:Glossary.Hierarchical code list.WebHome]] thus specifies the organisation of the [[codes>>doc:sdmx:Glossary.Code.WebHome]] in one or more [[hierarchies>>doc:sdmx:Glossary.Hierarchy.WebHome]], but does not define the [[codes>>doc:sdmx:Glossary.Code.WebHome]] themselves.
153 153  
154 -(% class="wikigeneratedid" id="HNotesonDataStructuring" %)
155 -**Notes on Data Structuring**
154 +=== Notes on Data Structuring ===
156 156  
157 157  A “cube” is a rich, multi-dimensional construct, which can be viewed along any of its axes (or “[[dimensions>>doc:sdmx:Glossary.Dimension.WebHome]]”). Whilst the full structure of cube data can be described in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]], the actual “data” specification of [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] takes a slightly narrower view of these requirements in its (% style="color:#e74c3c" %)version(%%) 2.0/2.1 specifications for the purposes of formatting the data for transmission. The view of data in many [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] formats is primarily as time series – that is, as a set of observations which are organized around the time [[dimension>>doc:sdmx:Glossary.Dimension.WebHome]], so that each observation occurs progressively through time.
158 158  
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162 162  
163 163  Further, there is support for the expression of functional dependencies between the various [[dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] of a cube, giving support for better processing of “sparse cubes”. This is an aspect of “(% style="color:#e74c3c" %)constraints(%%)”, which allow for the framing of a cube region, or for the provision of a set of valid keys within the total set of keys described by the [[data structure definition>>doc:sdmx:Glossary.Data structure definition.WebHome]].
164 164  
165 -(% class="wikigeneratedid" id="HNotesonReferenceMetadataStructuring" %)
166 -**Notes on Reference Metadata Structuring**
164 +=== Notes on Reference Metadata Structuring ===
167 167  
168 168  Metadata structures are based on the idea that (% style="color:#e74c3c" %)concepts(%%) can be organised into semantic and presentational [[hierarchies>>doc:sdmx:Glossary.Hierarchy.WebHome]], and that these [[hierarchies>>doc:sdmx:Glossary.Hierarchy.WebHome]] can form the basis for the structuring of XML reporting formats. There are three message types in [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] which serve this purpose: the Structure message (providing the [[metadata structure definition>>doc:sdmx:Glossary.Metadata structure definition.WebHome]]), the Generic Metadata message (providing a single format for any [[metadata structure definition>>doc:sdmx:Glossary.Metadata structure definition.WebHome]]), and the Structure-specific Metadata message (providing a [[metadata structure definition>>doc:sdmx:Glossary.Metadata structure definition.WebHome]]-specific format). Typically, this mechanism is suited to supporting [[reference metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] reporting and dissemination.
169 169