Changes for page SDMX 3.0 Standards. Summary of Major Changes and New Functionality

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From 16.8 to 16.9 From 19.5 to 19.6

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	1	+Artefact\|Code\|Code list\|Hierarchy\|Reference metadata\|SDMX-EDI\|SDMX-JSON\|SDMX-ML\|Statistical data and metadata exchange\|Structural metadata

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@@ -11,59 +11,59 @@
  = 1 Overview =
--SDMX version 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
++[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] (% style="color:#2ecc71" %)version(%%) 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
  **Information Model**
--* Simplification and improvement of the reference metadata model
++* Simplification and improvement of the [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] model
  * Support for microdata
  * Support for geospatial data
--* Support for code list extension and discriminated union of code lists
++* Support for [[code list>>doc:xwiki:Glossary.Code list.WebHome]] extension and discriminated union of [[code>>doc:xwiki:Glossary.Code.WebHome]] lists
  * Improvements to structure mapping
--* Improvements to code hierarchies for data discovery
++* Improvements to [[code>>doc:xwiki:Glossary.Code.WebHome]] [[hierarchies>>doc:xwiki:Glossary.Hierarchy.WebHome]] for data discovery
  * Improvements to constraints
  **Versioning of Structural Metadata Artefacts**
--* Adoption of the three-number semantic versioning standard for structural metadata artefacts ([[https:~~/~~/semver.org/>>https://semver.org/||rel="noopener noreferrer" target="_blank"]])
++* Adoption of the three-number semantic versioning standard for [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]] ([[https:~~/~~/semver.org/>>https://semver.org/||rel="noopener noreferrer" target="_blank"]])
  **REST Web Services Application Programming Interface (API)**
  * Change to a single ‘structure’ resource for structure queries simplifying the REST API specification by reducing the number of resources to five
  * Improvements to data queries
--* Improvements to reference metadata queries
--* Support for structural metadata maintenance using HTTP PUT, POST and DELETE verbs
++* Improvements to [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] queries
++* Support for [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] maintenance using HTTP PUT, POST and DELETE verbs
  **SOAP Web Services API**
--* The SOAP web services API has been deprecated with version 3.0 standardising on REST**;**
++* The SOAP web services API has been deprecated with (% style="color:#2ecc71" %)version(%%) 3.0 standardising on REST**;**
  **XML, JSON, CSV and EDI Transmission formats**
--* 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
--* 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
--* The SDMX-EDI transmission format for structures and data has been deprecated
--* The organisation of structures into ‘collections’ in SDMX-ML and SDMX-JSON structure messages has been flattened and simplified
--* The option to reference structures in SDMX-ML and SDMX-JSON messages using Agency, ID and Version has been deprecated with URN now exclusively used for all non-local referencing purpose
++* The [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]], [[SDMX-JSON>>doc:xwiki:Glossary.SDMX-JSON.WebHome]] and [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-CSV specifications have been extended and modified where needed to support the new features and changes such as [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] and microdata
++* Obsolete [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 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
++* The [[SDMX-EDI>>doc:xwiki:Glossary.SDMX-EDI.WebHome]] transmission format for structures and data has been deprecated
++* The organisation of structures into ‘collections’ in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:xwiki:Glossary.SDMX-JSON.WebHome]] structure messages has been flattened and simplified
++* The option to reference structures in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:xwiki:Glossary.SDMX-JSON.WebHome]] messages using Agency, ID and (% style="color:#2ecc71" %)Version(%%) has been deprecated with URN now exclusively used for all non-local referencing purpose
  **Breaking Changes**
--Many of the changes made are ‘breaking’ meaning that, while conversion between versions may be possible in certain circumstances, the 3.0 specification is not directly backwardly compatible with earlier versions of the Standard.
++Many of the changes made are ‘breaking’ meaning that, while conversion between (% style="color:#2ecc71" %)versions(%%) may be possible in certain circumstances, the 3.0 specification is not directly backwardly compatible with earlier (% style="color:#2ecc71" %)versions(%%) of the Standard.
  A summary of the main breaking changes is given in chapter 2.
  **Content of the Document**
--The remainder of the document provides a summary of the main changes. More detailed information can be found the SDMX 3.0 Technical Specifications, in particular:
++The remainder of the document provides a summary of the main changes. More detailed information can be found the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 Technical Specifications, in particular:
  * Section 2 – Information Model
  * Section 5 – Registry Specification
  * Section 6 – Technical Notes
--* SDMX-TWG GitHub for the REST API and the XML, JSON and CSV formats
++* [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-TWG GitHub for the REST API and the XML, JSON and CSV formats
  = 2 Summary of Breaking Changes in 3.0 =
--Version 3.0 introduces breaking changes into the web services API, transmission formats and information model. A summary is given in the table below.
++(% style="color:#2ecc71" %)Version(%%) 3.0 introduces breaking changes into the web services API, transmission formats and information model. A summary is given in the table below.
  == 2.1 Web Services API ==
@@ -80,9 +80,9 @@
  //Guidance for implementors//
--REST API implementors may provide partial backward compatibility by using web server URL rewriting rules to translate version 2.1 structure queries to the 3.0 equivalent.
++REST API implementors may provide partial backward compatibility by using web server URL rewriting rules to translate (% style="color:#2ecc71" %)version(%%) 2.1 structure queries to the 3.0 equivalent.
--Implementors are also recommended to version their API services providing users with an explicit choice of which version to use.
++Implementors are also recommended to (% style="color:#2ecc71" %)version(%%) their API services providing users with an explicit choice of which (% style="color:#2ecc71" %)version(%%) to use.
  )))
  |**SOAP API**|(% style="width:818px" %)The SOAP API has been deprecated.
@@ -93,33 +93,30 @@
  |(% style="width:130px" %)**SDMX-ML**|(% style="width:820px" %)(((
  The following legacy XML data messages have been deprecated:
--SDMX-ML 1.0/2.0 Generic (time-series) data message
++[[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Generic (time-series) data message
++[[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Compact (time-series) data message
++[[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Utility (time-series) data message
++[[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Cross-Sectional data message [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] 2.1 Generic data messages (for observations, time-series and cross-sectional data)
--SDMX-ML 1.0/2.0 Compact (time-series) data message
++Structure Specific is the only data message option in (% style="color:#2ecc71" %)version(%%) 3.0 but is not backwardly compatible with (% style="color:#2ecc71" %)version(%%) 2.1 due to several changes including deprecation of the option to reference structures like the [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]], [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]] and [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]] using their Agency, ID and (% style="color:#2ecc71" %)Version(%%). The time series variant of the message has also been deprecated.
--SDMX-ML 1.0/2.0 Utility (time-series) data message
++The [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] structure message is not backwardly compatible primarily due to:
--SDMX-ML 1.0/2.0 Cross-Sectional data message SDMX-ML 2.1 Generic data messages (for observations, time-series and cross-sectional data)
--
--Structure Specific is the only data message option in version 3.0 but is not backwardly compatible with version 2.1 due to several changes including deprecation of the option to reference structures like the DSD, Dataflow and Provision Agreement using their Agency, ID and Version. The time series variant of the message has also been deprecated.
--
--The SDMX-ML structure message is not backwardly compatible primarily due to:
--
  * Changes to the information model
  * Changes to the way the structures are organised into ‘collections’ within the message
--* Deprecation of the Agency, ID, Version option for referencing of structures in messages
++* Deprecation of the Agency, ID, (% style="color:#2ecc71" %)Version(%%) option for referencing of structures in messages
  )))
  |(% style="width:130px" %)**SDMX-JSON**|(% style="width:820px" %)(((
--The JSON data message is not backwardly compatible with version 2.1 primarily due to changes needed to support the improved REST API data queries, in particular the ability to retrieve in one operation data from multiple datasets with potentially different Data Structure Definitions.
++The JSON data message is not backwardly compatible with (% style="color:#2ecc71" %)version(%%) 2.1 primarily due to changes needed to support the improved REST API data queries, in particular the ability to retrieve in one operation data from multiple [[datasets>>doc:xwiki:Glossary.Data set.WebHome]] with potentially different Data Structure Definitions.
  The JSON structure message is not backwardly compatible primarily due to:
  * Changes to the information model
  * Changes to the way the structures are organised into ‘collections’ within the message
--* Deprecation of the Agency, ID, Version option for referencing of structures in messages
++* Deprecation of the Agency, ID, (% style="color:#2ecc71" %)Version(%%) option for referencing of structures in messages
  )))
  |(% style="width:130px" %)**SDMX-EDI**|(% style="width:820px" %)The EDI format for both structures and data has been deprecated.
--|(% style="width:130px" %)**SDMX-CSV**|(% style="width:820px" %)The CSV data and reference metadata messages are not backwardly compatible with those under version 2.1 due to changes to the structure of the messages needed to support new features such as the improved REST API data queries.
++|(% style="width:130px" %)**SDMX-CSV**|(% style="width:820px" %)The CSV data and [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] messages are not backwardly compatible with those under (% style="color:#2ecc71" %)version(%%) 2.1 due to changes to the structure of the messages needed to support new features such as the improved REST API data queries.
  )))
  == 2.3 Information Model ==
@@ -127,51 +127,51 @@
  (((
  (% style="width:955.039px" %)
  |(% style="width:132px" %)**Data Structure Definition**|(% style="width:819px" %)(((
--The version 3.0 Data Structure Definition (DSD) model is not directly backwardly compatible with 2.1 primarily due to the deprecation of the special MeasureDimension.
++The (% style="color:#2ecc71" %)version(%%) 3.0 [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] ([[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]]) model is not directly backwardly compatible with 2.1 primarily due to the deprecation of the special MeasureDimension.
  //Conversion guidance for implementors//
--Version 2.1 DSDs can be converted to the 3.0 model by creating a measure with the “MEASURE” concept role applied as described in paragraph 3.5.
++(% style="color:#2ecc71" %)Version(%%) 2.1 DSDs can be converted to the 3.0 model by creating a [[measure>>doc:xwiki:Glossary.Measure.WebHome]] with the “[[MEASURE>>doc:xwiki:Glossary.Measure.WebHome]]” (% style="color:#2ecc71" %)concept(%%) role applied as described in paragraph 3.5.
--Version 3.0 DSDs cannot be reliably converted to the 2.1 model due to the introduction of new features such as multiple measures and value arrays for measures and attributes.
++(% style="color:#2ecc71" %)Version(%%) 3.0 DSDs cannot be reliably converted to the 2.1 model due to the introduction of new features such as multiple [[measures>>doc:xwiki:Glossary.Measure.WebHome]] and value arrays for [[measures>>doc:xwiki:Glossary.Measure.WebHome]] and [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]].
  )))
  |(% style="width:132px" %)**Structure mapping model**|(% style="width:819px" %)(((
--The structure mapping model has changed significantly in version 3.0 with deprecation of the Structure Set maintainable artefact and introduction of five new ones: Representation Map and four variants of item scheme map.
++The structure mapping model has changed significantly in (% style="color:#2ecc71" %)version(%%) 3.0 with deprecation of the [[Structure Set>>doc:xwiki:Glossary.Structure set.WebHome]] [[maintainable artefact>>doc:xwiki:Glossary.Maintainable artefact.WebHome]] and introduction of five new ones: [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map(%%) and four variants of [[item scheme>>doc:xwiki:Glossary.Item scheme.WebHome]] (% style="color:#2ecc71" %)map(%%).
  //Conversion guidance for implementors//
--Version 2.1 structure sets can be practically converted to the version 3.0 structure mapping model.
++(% style="color:#2ecc71" %)Version(%%) 2.1 [[structure sets>>doc:xwiki:Glossary.Structure set.WebHome]] can be practically converted to the (% style="color:#2ecc71" %)version(%%) 3.0 structure mapping model.
--Conversion from the version 3.0 structure mapping model to 2.1 is generally possible. However, when attempting to convert mapping rules from 2.1 to 3.0 and back to 2.1, the resulting Structure Set will not be precisely the same as the original. In converting to version 3.0, the system must generate IDs for each of the new maintainable artefacts, but details of the original Structure Set artefacts are lost.
++Conversion from the (% style="color:#2ecc71" %)version(%%) 3.0 structure mapping model to 2.1 is generally possible. However, when attempting to convert mapping rules from 2.1 to 3.0 and back to 2.1, the resulting [[Structure Set>>doc:xwiki:Glossary.Structure set.WebHome]] will not be precisely the same as the original. In converting to (% style="color:#2ecc71" %)version(%%) 3.0, the system must generate IDs for each of the new [[maintainable artefacts>>doc:xwiki:Glossary.Maintainable artefact.WebHome]], but details of the original [[Structure Set>>doc:xwiki:Glossary.Structure set.WebHome]] [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]] are lost.
  )))
  |(% style="width:132px" %)**Reference metadata model**|(% style="width:819px" %)(((
--The reference metadata model has changed in version 3.0 with modifications to the role of the Data Structure Definition, Metadata Structure Definition and Metadataflow artefacts. Metadata Provision Agreement and Metadata Provider Scheme have been added. Metadatasets are now identifiable.
++The [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] model has changed in (% style="color:#2ecc71" %)version(%%) 3.0 with modifications to the role of the [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]], [[Metadata Structure Definition>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] and [[Metadataflow>>doc:xwiki:Glossary.Metadataflow.WebHome]] [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]]. Metadata [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]] and Metadata Provider Scheme have been added. Metadatasets are now identifiable.
--Version 2.1 reference metadata models are not valid in version 3.0.
++(% style="color:#2ecc71" %)Version(%%) 2.1 [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] models are not valid in (% style="color:#2ecc71" %)version(%%) 3.0.
  //Conversion guidance for implementors//
--A version 2.1 Metadata Structure Definition can be converted to the version 3.0 model under some circumstances, but target information is either lost or has to be translated into a metadataflow. Further, conversion of a Data Structure Definition for collecting reference metadata against a dataset would need to make changes to the dataset’s Data Structure Definition. As the Data Structure Definition may not actually be specified, judgement would need to be taken, perhaps determining the most likely candidate by examining which already have metadata reported against their datasets. A 2.1 metadata report could be converted to a version 3.0 Metadataset if it is attached to a structure, but requires a Metadata Provision Agreement which would need to be created if not already in existence.
++A (% style="color:#2ecc71" %)version(%%) 2.1 [[Metadata Structure Definition>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] can be converted to the (% style="color:#2ecc71" %)version(%%) 3.0 model under some circumstances, but target information is either lost or has to be translated into a [[metadataflow>>doc:xwiki:Glossary.Metadataflow.WebHome]]. Further, conversion of a [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] for collecting [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] against a [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] would need to make changes to the [[dataset>>doc:xwiki:Glossary.Data set.WebHome]]’s [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]]. As the [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] may not actually be specified, judgement would need to be taken, perhaps determining the most likely candidate by examining which already have metadata reported against their [[datasets>>doc:xwiki:Glossary.Data set.WebHome]]. A 2.1 metadata report could be converted to a (% style="color:#2ecc71" %)version(%%) 3.0 Metadataset if it is attached to a structure, but requires a Metadata [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]] which would need to be created if not already in existence.
--Conversion from the version 3.0 model to version 2.1 cannot be performed reliably. The process would need target information to be derived from analysis of the Metadataflows and Metadata Provision Agreements. Depending on the complexity it may not be possible to express that information in a version 2.1 Data Structure Definition.
++Conversion from the (% style="color:#2ecc71" %)version(%%) 3.0 model to (% style="color:#2ecc71" %)version(%%) 2.1 cannot be performed reliably. The process would need target information to be derived from analysis of the [[Metadataflows>>doc:xwiki:Glossary.Metadataflow.WebHome]] and Metadata [[Provision Agreements>>doc:xwiki:Glossary.Provision agreement.WebHome]]. Depending on the complexity it may not be possible to express that information in a (% style="color:#2ecc71" %)version(%%) 2.1 [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]].
  )))
  |(% style="width:132px" %)**Constraint model**|(% style="width:819px" %)(((
--The version 2.1 Content Constraint artefact has been deprecated in version 3.0 and replaced by the Data Constraint for data, and the Metadata Constraint for reference metadata.
++The (% style="color:#2ecc71" %)version(%%) 2.1 Content (% style="color:#2ecc71" %)Constraint(%%) [[artefact>>doc:xwiki:Glossary.Artefact.WebHome]] has been deprecated in (% style="color:#2ecc71" %)version(%%) 3.0 and replaced by the Data (% style="color:#2ecc71" %)Constraint(%%) for data, and the Metadata (% style="color:#2ecc71" %)Constraint(%%) for reference metadata.
  //Conversion guidance for implementors//
--2.1 Content Constraints can be converted without loss to the equivalent version 3.0 Data Constraint model.
++2.1 Content (% style="color:#2ecc71" %)Constraints(%%) can be converted without loss to the equivalent (% style="color:#2ecc71" %)version(%%) 3.0 Data (% style="color:#2ecc71" %)Constraint(%%) model.
  Conversion from 3.0 to 2.1 presents challenges where wildcards have been used, in those cases requiring expansion of the wildcard into explicit values.
  )))
  |(% style="width:132px" %)**Hierarchical codelist structures**|(% style="width:819px" %)(((
--The version 2.1 Hierarchical Codelist artefact has been deprecated in version 3.0 and replaced by two new artefacts, Hierarchy and Hierarchy Association.
++The (% style="color:#2ecc71" %)version(%%) 2.1 Hierarchical Codelist [[artefact>>doc:xwiki:Glossary.Artefact.WebHome]] has been deprecated in (% style="color:#2ecc71" %)version(%%) 3.0 and replaced by two new [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]], [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] and [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] Association.
  //Conversion guidance for implementors//
--Version 2.1 Hierarchical Codelists can be successfully converted to the version 3.0 hierarchy model. Information on which artefacts to link the hierarchies to on what context would need to be added as a separate procedure.
++(% style="color:#2ecc71" %)Version(%%) 2.1 Hierarchical Codelists can be successfully converted to the (% style="color:#2ecc71" %)version(%%) 3.0 [[hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] model. Information on which [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]] to link the [[hierarchies>>doc:xwiki:Glossary.Hierarchy.WebHome]] to on what context would need to be added as a separate procedure.
--Conversion from the version 3.0 model to version 2.1 is possible, but with loss of the linking information
++Conversion from the (% style="color:#2ecc71" %)version(%%) 3.0 model to (% style="color:#2ecc71" %)version(%%) 2.1 is possible, but with loss of the linking information
  )))
  )))
@@ -183,25 +183,25 @@
  //Figure 1 Version 3.0 simplified Information Model UML class diagram with ‘heat map’ illustrating the areas with most change//
--The schematic above is a simplified UML class diagram of the SDMX 3.0 information model illustrating the major areas of change as a ‘heat map’. Darker colours indicate where new structures have been added in version 3.0 or where structures have been significantly changed.
++The schematic above is a simplified UML class diagram of the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 information model illustrating the major areas of change as a ‘heat (% style="color:#2ecc71" %)map(%%)’. Darker colours indicate where new structures have been added in (% style="color:#2ecc71" %)version(%%) 3.0 or where structures have been significantly changed.
--A number of ancillary structures including organisation schemes, process and reporting taxonomy are unchanged and have not been shown. Similarly, Organisation Scheme Map and Reporting Taxonomy Map have been omitted for simplicity. A schematic of the 2.1 model is given in Appendix A for comparison purposes.
++A number of ancillary structures including organisation schemes, process and [[reporting taxonomy>>doc:xwiki:Glossary.Reporting taxonomy.WebHome]] are unchanged and have not been shown. Similarly, Organisation Scheme (% style="color:#2ecc71" %)Map(%%) and [[Reporting Taxonomy>>doc:xwiki:Glossary.Reporting taxonomy.WebHome]] (% style="color:#2ecc71" %)Map(%%) have been omitted for simplicity. A schematic of the 2.1 model is given in Appendix A for comparison purposes.
  == 3.2 Key Changes from Version 2.1 ==
  New Maintainable Artefacts
--* Structure Map
--* Representation Map
--* Organisation Scheme Map
--* Concept Scheme Map
--* Category Scheme Map
--* Reporting Taxonomy Map
++* Structure (% style="color:#2ecc71" %)Map
++* [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map
++* Organisation Scheme (% style="color:#2ecc71" %)Map
++* (% style="color:#2ecc71" %)Concept(%%) Scheme (% style="color:#2ecc71" %)Map
++* Category Scheme (% style="color:#2ecc71" %)Map
++* Reporting Taxonomy (% style="color:#2ecc71" %)Map
  * Value List
--* Hierarchy
--* Hierarchy Association
--* Metadata Constraint
--* Data Constraint
++* [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]]
++* [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] Association
++* Metadata (% style="color:#2ecc71" %)Constraint
++* Data (% style="color:#2ecc71" %)Constraint
  * Metadata Provision Agreement
  * Metadata Provider Scheme
  * Metadataset
@@ -214,25 +214,25 @@
  Removed Maintainable Artefacts
--* Structure Set – replaced by Structure Map and the four item scheme maps
--* Hierarchical Codelist – replaced by Hierarchy and Hierarchy Association
--* Constraint – replaced by Data Constraint and Metadata Constraint
++* Structure Set – replaced by Structure (% style="color:#2ecc71" %)Map(%%) and the four [[item scheme>>doc:xwiki:Glossary.Item scheme.WebHome]] maps
++* Hierarchical Codelist – replaced by [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] and [[Hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] Association
++* (% style="color:#2ecc71" %)Constraint(%%) – replaced by Data (% style="color:#2ecc71" %)Constraint(%%) and Metadata (% style="color:#2ecc71" %)Constraint
  Changed Maintainable Artefacts
--* Data Structure Definition – support for microdatasets and reference metadata linked to data
--* Metadataflow – simplifies exchange of reference metadata, in particular those linked to structures
--* Metadata Structure Definition – simplified model for reference metadata
++* Data Structure Definition – support for microdatasets and [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] linked to data
++* Metadataflow – simplifies exchange of [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]], in particular those linked to structures
++* Metadata Structure Definition – simplified model for [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]]
  * Codelist – support for codelist extension and geospatial specialised codelists (GeographicCodelist, GeoGridCodelist)
--* VTL Mapping Scheme – VTL Concept Mapping Scheme removed to align the VTL / SDMX interface with the 3.0 model
++* [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] Mapping Scheme – [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] (% style="color:#2ecc71" %)Concept(%%) Mapping Scheme removed to align the [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] / [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] interface with the 3.0 model
--New Component Representation Types
++New [[Component>>doc:xwiki:Glossary.Component.WebHome]] [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] Types
  * GeospatialInformation – a string type where the value is an expression defining a set of geographical features using a purpose-designed syntax
  == 3.3 Areas Unchanged from Version 2.1 ==
--The following areas of the information model are unchanged from version 2.1:
++The following areas of the information model are unchanged from (% style="color:#2ecc71" %)version(%%) 2.1:
  * Categories
  * Concepts
@@ -239,17 +239,17 @@
  * Data providers
  * Agencies
  * Data consumers
--* VTL transformation and expressions – with the exception of VTL mapping scheme as already noted
++* [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] transformation and expressions – with the exception of [[VTL>>doc:xwiki:Glossary.Validation and transformation language.WebHome]] mapping scheme as already noted
  * Reporting taxonomy
  * Process
  == 3.4 Reference Metadata ==
--Reference metadata has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
++[[Reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] has been substantially re-designed for (% style="color:#2ecc71" %)version(%%) 3.0 to simplify the model and better support practical use cases.
  (% class="wikigeneratedid" id="HSimplifyMetadataStructureDefinition" %)
  **Simplify Metadata Structure Definition**
--The Metadata Structure Definition (MSD) has been simplified to remove target information, and the support of multiple report structures. The MSD now only contains Metadata Attributes which are used to define the structure of a report.
++The [[Metadata Structure Definition>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] ([[MSD>>doc:xwiki:Glossary.Metadata structure definition.WebHome]]) has been simplified to remove target information, and the support of multiple report structures. The [[MSD>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] now only contains Metadata [[Attributes>>doc:xwiki:Glossary.Attribute.WebHome]] which are used to define the structure of a report.
  [[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_ad5f5c97.png||height="346" width="494"]]
@@ -261,15 +261,17 @@
  (% class="wikigeneratedid" id="HChangetoreferencemetadatareportedagainstdata" %)
  **Change to reference metadata reported against data**
--Reference metadata associated with datasets, data series or observations are now reported with the data. The dataset’s DSD must reference an MSD to define the structure of its reference metadata. In practice reference metadata for data are transmitted as part of the data message. The metadata attributes are treated in a similar way to the data attributes appearing in the message at the dataset, data series or individual observation level as appropriate. In contrast to simple data attributes, metadata attributes defined by an MSD can be organised into a hierarchical structure as illustrated in Figure 3 above. For this reason, metadata attributes appear in data messages structured in the same way as metadata messages.
--The SDMX-ML example below is an excerpt from a structure specific data message illustrating reporting of reference metadata with a hierarchical structure at the observation level.
++(% class="wikigeneratedid" id="HChangetoreferencemetadatareportedagainstdata" %)
++[[Reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] associated with [[datasets>>doc:xwiki:Glossary.Data set.WebHome]], data series or observations are now reported with the data. The [[dataset>>doc:xwiki:Glossary.Data set.WebHome]]’s [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]] must reference an [[MSD>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] to define the structure of its [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]]. In practice [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] for data are transmitted as part of the data message. The metadata [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] are treated in a similar way to the data [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] appearing in the message at the [[dataset>>doc:xwiki:Glossary.Data set.WebHome]], data series or individual observation (% style="color:#2ecc71" %)level(%%) as appropriate. In contrast to simple data [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]], metadata [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] defined by an [[MSD>>doc:xwiki:Glossary.Metadata structure definition.WebHome]] can be organised into a hierarchical structure as illustrated in Figure 3 above. For this reason, metadata [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] appear in data messages structured in the same way as metadata messages.
++The [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] example below is an excerpt from a structure specific data message illustrating reporting of [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] with a hierarchical structure at the observation (% style="color:#2ecc71" %)level(%%).
++
  For completeness, the excerpt also shows:
--* OBS_STATUS – a simple observation-level data attribute
--* TITLE – a multi-lingual data attribute
--* SOURCE_AGENCY – a multi-value data attribute
++* OBS_STATUS – a simple observation-(% style="color:#2ecc71" %)level(%%) data [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]]
++* TITLE – a multi-lingual data [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]]
++* SOURCE_AGENCY – a multi-value data [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]]
  > <Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
  >     <!—- complex multi-value and multi-lingual data attributes ~-~->
@@ -314,23 +314,24 @@
  (% class="wikigeneratedid" id="HNew-MetadataProvisionAgreement" %)
  **New - Metadata Provision Agreement**
--In version 2.1 a Provision Agreement could be used to report information against a Dataflow or Metadataflow. From version 3.0 this is managed by two separate structures, the Data Provision Agreement and the Metadata Provision Agreement.
++(% class="wikigeneratedid" id="HNew-MetadataProvisionAgreement" %)
++In (% style="color:#2ecc71" %)version(%%) 2.1 a [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]] could be used to report information against a [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]] or [[Metadataflow>>doc:xwiki:Glossary.Metadataflow.WebHome]]. From (% style="color:#2ecc71" %)version(%%) 3.0 this is managed by two separate structures, the Data [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]] and the Metadata [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]].
++
  (% class="wikigeneratedid" id="HMovetargettoMetadataflowandMetadataProvisionAgreement" %)
  **Move target to Metadataflow and Metadata Provision Agreement**
--For reference metadata that is reported against structures, the allowable targets information which is used to specify what structures the reference metadata can be reported against, has moved to the Metadataflow and can be further refined in the Metadata Provision Agreement.
++For [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] that is reported against structures, the allowable targets information which is used to specify what structures the [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] can be reported against, has moved to the [[Metadataflow>>doc:xwiki:Glossary.Metadataflow.WebHome]] and can be further refined in the Metadata [[Provision Agreement>>doc:xwiki:Glossary.Provision agreement.WebHome]].
  (% class="wikigeneratedid" id="HAddmaintainablepropertiestoreferencemetadata" %)
  **Add maintainable properties to reference metadata**
--A Metadataset now has mandatory identification information, (owner id, id, version) enabling metadata providers to uniquely identify their reports for create, update or delete maintenance operations.
++A Metadataset now has mandatory identification information, (owner id, id, (% style="color:#2ecc71" %)version(%%)) enabling metadata providers to uniquely identify their reports for create, update or delete maintenance operations.
  == 3.5 Microdata Exchange ==
--Several changes have been made the Data Structure Definition to support microdata use cases in addition to aggregated time series.
++Several changes have been made the [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] to support microdata use cases in addition to aggregated time series.
  (% class="wikigeneratedid" id="HMultiplemeasures" %)
--**Multiple measures**
--Multiple measures are a common characteristic of microdatasets. To support this use case, the MeasureDimension has been deprecated and replaced with the option to define zero or more measures. Measures now act like any other component in that they use concepts, can have their own local coded or uncoded representation defined within the Data Structure Definition, and can be either mandatory or conditional. Creating a measure with the “MEASURE” concept role applied emulates the version 2.1 MeasureDimension behaviour as illustrated in the SDMX-ML example below:
++**Multiple measures**Multiple [[measures>>doc:xwiki:Glossary.Measure.WebHome]] are a common characteristic of microdatasets. To support this use case, the MeasureDimension has been deprecated and replaced with the option to define zero or more [[measures>>doc:xwiki:Glossary.Measure.WebHome]]. [[Measures>>doc:xwiki:Glossary.Measure.WebHome]] now act like any other [[component>>doc:xwiki:Glossary.Component.WebHome]] in that they use (% style="color:#2ecc71" %)concepts(%%), can have their own local coded or uncoded [[representation>>doc:xwiki:Glossary.Representation.WebHome]] defined within the [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]], and can be either mandatory or conditional. Creating a [[measure>>doc:xwiki:Glossary.Measure.WebHome]] with the “[[MEASURE>>doc:xwiki:Glossary.Measure.WebHome]]” (% style="color:#2ecc71" %)concept(%%) role applied emulates the (% style="color:#2ecc71" %)version(%%) 2.1 MeasureDimension behaviour as illustrated in the [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] example below:
  > <str:MeasureList id=”MeasureDescriptor”>
  >     <str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
@@ -349,30 +349,34 @@
  (% class="wikigeneratedid" id="HMulti-valuemeasuresandattributes" %)
  **Multi-value measures and attributes**
--Both measures and attributes have been extended with the option to take ‘arrays’ of 193 multiple coded or uncoded values. This supports use cases like multiple observation 194 status flags. New //minOccurs// and //maxOccurs// properties define the valid number of 195 values. The //usage// property separately defines whether the measure or attribute is //mandatory// or optional. In the SDMX-ML measure example above, the properties //minOccurs=”1” maxOccurs=”1” usage=”mandatory”// specify that OBS_VALUE must be 198 reported, and can only consist of a single value.
++(% class="wikigeneratedid" id="HMulti-valuemeasuresandattributes" %)
++Both [[measures>>doc:xwiki:Glossary.Measure.WebHome]] and [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] have been extended with the option to take ‘arrays’ of 193 multiple coded or uncoded values. This supports use cases like multiple observation 194 status flags. New //minOccurs// and //maxOccurs// properties define the valid number of 195 values. The //usage// property separately defines whether the [[measure>>doc:xwiki:Glossary.Measure.WebHome]] or [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is //mandatory// or optional. In the [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] [[measure>>doc:xwiki:Glossary.Measure.WebHome]] example above, the properties //minOccurs=”1” maxOccurs=”1” usage=”mandatory”// specify that OBS_VALUE must be 198 reported, and can only consist of a single value.
++
  (% class="wikigeneratedid" id="HAttributesrelationshiptomeasures" %)
  **Attributes relationship to measures**
--In addition to attaching attributes to a specific level within the dataset, their relationship 202 to measures can also be defined.
++In addition to attaching [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] to a specific (% style="color:#2ecc71" %)level(%%) within the [[dataset>>doc:xwiki:Glossary.Data set.WebHome]], their relationship 202 to [[measures>>doc:xwiki:Glossary.Measure.WebHome]] can also be defined.
  (% class="wikigeneratedid" id="HValuelists" %)
  **Value lists**
--Value lists help in modelling microdata by providing an enumeration similar to code lists 206 but allowing any string values without being restricted to the rules of SDMX identifiers. That allows ValueItems (the equivalent to Code) to contain symbols like ‘¥’ and ‘€’, but also means they are not identifiable.
++Value lists help in modelling microdata by providing an enumeration similar to [[code lists>>doc:xwiki:Glossary.Code list.WebHome]] 206 but allowing any string values without being restricted to the rules of [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers. That allows ValueItems (the equivalent to [[Code>>doc:xwiki:Glossary.Code.WebHome]]) to contain symbols like ‘¥’ and ‘€’, but also means they are not identifiable.
  == 3.6 Geospatial Data Exchange ==
--The version 3.0 model has been extended to provide explicit support for geospatial data.
++The (% style="color:#2ecc71" %)version(%%) 3.0 model has been extended to provide explicit support for geospatial data.
  (% class="wikigeneratedid" id="HGeospatialInformationtype" %)
  **GeospatialInformation type**
--A new GeospatialInformation string type has been added which can be used as the 214 representation for any dimension, attribute or measure component. The value which is a 215 string expression conforming to the syntax defined in Section 6 of the technical 216 specifications precisely defines a ‘Geo Feature Set’ – a collection of geographical 217 features like points, lines or polygons. Its use is recommended in conjunction with the “GEO_FEATURE_SET” concept role.
++A new GeospatialInformation string type has been added which can be used as the [[representation>>doc:xwiki:Glossary.Representation.WebHome]] for any [[dimension>>doc:xwiki:Glossary.Dimension.WebHome]], [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] or measure [[component>>doc:xwiki:Glossary.Component.WebHome]]. The value which is a string expression conforming to the syntax defined in Section 6 of the technical specifications precisely defines a ‘Geo Feature Set’ – a collection of geographical features like points, lines or polygons. Its use is recommended in conjunction with the “GEO_FEATURE_SET” (% style="color:#2ecc71" %)concept(%%) role.
  (% class="wikigeneratedid" id="HGeospatialcodelists" %)
  **Geospatial code lists**
--Two new specialised types of code list have been added where the definition of each code includes additional geospatial information in addition to the standard ID, name and description:
++(% class="wikigeneratedid" id="HGeospatialcodelists" %)
++Two new specialised types of [[code list>>doc:xwiki:Glossary.Code list.WebHome]] have been added where the definition of each [[code>>doc:xwiki:Glossary.Code.WebHome]] includes additional geospatial information in addition to the standard ID, name and description:
++
  * GeographicCodelist – each item includes an element to represent a specific Geo Feature Set which is described using the same expression syntax as for GeospatialInformation type.
--* GeoGridCodelist – A code list defining a geographical grid composed of cells representing regular squared portions of the Earth. Each item references a cell within the grid.
++* GeoGridCodelist – A [[code list>>doc:xwiki:Glossary.Code list.WebHome]] defining a geographical grid composed of cells representing regular squared portions of the Earth. Each item references a cell within the grid.
  == 3.7 Structure Mapping ==
@@ -664,8 +664,8 @@
  CSV in SDMX is used transmission of data and reference metadata only.
--=== Data message ===
--
++(% class="wikigeneratedid" id="HDatamessage-1" %)
++**Data message**
  The SDMX-CSV data message has been modified to align with the version 3.0 information model, support the enhanced REST API and ensure that data can be freely converted to and from the XML and JSON formats without loss. These changes include:
  * An additional column identifying the type if the artefact defining the structure of the data: “dataflow”, “datastructure” or “dataprovision”; • A column for the structure artefact’s identification of the form
@@ -674,11 +674,11 @@
  * A column for the dataset action: information, append, replace or delete, which is consistent with both the the SDMX-ML and SDMX-JSON data messages.
--=== Reference metadata message ===
--
++(% class="wikigeneratedid" id="HReferencemetadatamessage-2" %)
++**Reference metadata message**
  The SDMX-CSV metadata message is new for version 3.0 and, like the SDMX-ML and SDMX-JSON equivalents, is used for the transmission reference metadata sets.
--=== 6.4 EDI deprecation ===
++== 6.4 EDI deprecation ==
  The EDI format for transmission of both structures and data has been deprecated. Version 3.0 is therefore not backwardly compatible with legacy EDI messages.