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Summary

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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
Content
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11 11  
12 12  = 1 Overview =
13 13  
14 -SDMX version 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
14 +[[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:
15 15  
16 16  **Information Model**
17 17  
18 -* Simplification and improvement of the reference metadata model
18 +* Simplification and improvement of the [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] model
19 19  * Support for microdata
20 20  * Support for geospatial data
21 -* Support for code list extension and discriminated union of code lists
21 +* Support for [[code list>>doc:xwiki:Glossary.Code list.WebHome]] extension and discriminated union of [[code>>doc:xwiki:Glossary.Code.WebHome]] lists
22 22  * Improvements to structure mapping
23 -* Improvements to code hierarchies for data discovery
23 +* Improvements to [[code>>doc:xwiki:Glossary.Code.WebHome]] [[hierarchies>>doc:xwiki:Glossary.Hierarchy.WebHome]] for data discovery
24 24  * Improvements to constraints
25 25  
26 26  **Versioning of Structural Metadata Artefacts**
27 27  
28 -* Adoption of the three-number semantic versioning standard for structural metadata artefacts ([[https:~~/~~/semver.org/>>https://semver.org/||rel="noopener noreferrer" target="_blank"]])
28 +* 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"]])
29 29  
30 30  **REST Web Services Application Programming Interface (API)**
31 31  
32 32  * Change to a single ‘structure’ resource for structure queries simplifying the REST API specification by reducing the number of resources to five
33 33  * Improvements to data queries
34 -* Improvements to reference metadata queries
35 -* Support for structural metadata maintenance using HTTP PUT, POST and DELETE verbs
34 +* Improvements to [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] queries
35 +* Support for [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] maintenance using HTTP PUT, POST and DELETE verbs
36 36  
37 37  **SOAP Web Services API**
38 38  
39 -* The SOAP web services API has been deprecated with version 3.0 standardising on REST**;**
39 +* The SOAP web services API has been deprecated with (% style="color:#2ecc71" %)version(%%) 3.0 standardising on REST**;**
40 40  
41 41  **XML, JSON, CSV and EDI Transmission formats**
42 42  
43 -* 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
44 -* 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
45 -* The SDMX-EDI transmission format for structures and data has been deprecated
46 -* The organisation of structures into ‘collections’ in SDMX-ML and SDMX-JSON structure messages has been flattened and simplified
47 -* 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
43 +* 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
44 +* 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
45 +* The [[SDMX-EDI>>doc:xwiki:Glossary.SDMX-EDI.WebHome]] transmission format for structures and data has been deprecated
46 +* 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
47 +* 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
48 48  
49 49  **Breaking Changes**
50 50  
51 -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.
51 +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.
52 52  
53 53  A summary of the main breaking changes is given in chapter 2.
54 54  
55 55  **Content of the Document**
56 56  
57 -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:
57 +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:
58 58  
59 59  * Section 2 – Information Model
60 60  * Section 5 – Registry Specification
61 61  * Section 6 – Technical Notes
62 -* SDMX-TWG GitHub for the REST API and the XML, JSON and CSV formats
62 +* [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]-TWG GitHub for the REST API and the XML, JSON and CSV formats
63 63  
64 64  = 2 Summary of Breaking Changes in 3.0 =
65 65  
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94 94  The following legacy XML data messages have been deprecated:
95 95  
96 96  SDMX-ML 1.0/2.0 Generic (time-series) data message
97 -
98 98  SDMX-ML 1.0/2.0 Compact (time-series) data message
99 -
100 100  SDMX-ML 1.0/2.0 Utility (time-series) data message
99 +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)
101 101  
102 -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)
103 -
104 104  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.
105 105  
106 106  The SDMX-ML structure message is not backwardly compatible primarily due to:
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644 644  
645 645  Like SDMX-ML, the SDMX-JSON messages have been significantly modified and updated for version 3.0. They are not backwardly compatible with version 2.1.
646 646  
647 -=== Structure message ===
648 -
644 +(% class="wikigeneratedid" id="HStructuremessage-1" %)
645 +**Structure message**
649 649  The SDMX-JSON structure message closely replicates the SDMX-ML equivalent. Like that of SDMX-ML it has been updated to align it with the version 3.0 information model with addition, deletion and modification of artefacts as required. The organisation of the structure collections has also been revised as detailed in paragraph 6.1.
650 650  
651 -=== Data message ===
652 -
648 +(% class="wikigeneratedid" id="HDatamessage" %)
649 +**Data message**
653 653  The SDMX-JSON data message has similarly be updated. Additional changes have been made to allow a single message to carry data from multiple datasets with potentially different Data Structure Definitions to support REST data queries of the form “retrieve all data about a country”. For this reason, the version 3.0 SDMX-JSON is not backwardly compatible with version 2.1 data messages. Support has been added for the transmission of microdata and reporting of reference metadata on data as an integral part of the dataset.
654 654  
655 -=== Reference metadata message ===
656 -
652 +(% class="wikigeneratedid" id="HReferencemetadatamessage-1" %)
653 +**Reference metadata message**
657 657  The SDMX-JSON metadata message has also been updated to support the version 3.0 reference metadata and Metadataset specifications.
658 658  
659 -=== Structure referencing ===
660 -
656 +(% class="wikigeneratedid" id="HStructurereferencing-1" %)
657 +**Structure referencing**
661 661  As for SDMX-ML, the option to reference structures using Agency, ID and Version has been removed with URN used for all non-local referencing purposes.
662 662  
663 663  == 6.3 SDMX-CSV ==
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664 664  
665 665  CSV in SDMX is used transmission of data and reference metadata only.
666 666  
667 -=== Data message ===
668 -
664 +(% class="wikigeneratedid" id="HDatamessage-1" %)
665 +**Data message**
669 669  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:
670 670  
671 671  * 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
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674 674  
675 675  * 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.
676 676  
677 -=== Reference metadata message ===
678 -
674 +(% class="wikigeneratedid" id="HReferencemetadatamessage-2" %)
675 +**Reference metadata message**
679 679  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.
680 680  
681 -=== 6.4 EDI deprecation ===
678 +== 6.4 EDI deprecation ==
682 682  
683 683  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.
684 684