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1 -SDMX 3.1 Standards. Section 1. Summary of Major Changes and New Functionality
1 +SDMX 3.1 Standards. Section 1. Summary of major changes and new functionality
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1 -xwiki:XWiki.arturkryazhev
1 +xwiki:XWiki.helena
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2 2  {{toc/}}
3 3  {{/box}}
4 4  
5 -= 1. Overview =
5 +**Revision History**
6 6  
7 -[[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 is a minor revision to the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 Standard which introduces a limited set of changes, which cover the following:
7 +(% style="width:991.835px" %)
8 +|(% style="width:154px" %)**Revision ** |(% style="width:249px" %)**Date ** |(% style="width:586px" %)**Contents **
9 +|(% style="width:154px" %)DRAFT 1.0|(% style="width:249px" %)December 2024|(% style="width:586px" %)Draft release updated for SDMX 3.1 for public consultation
10 +|(% style="width:154px" %)1.0|(% style="width:249px" %)May 2025|(% style="width:586px" %)Public release for SDMX 3.1
8 8  
9 -**Information Model**
10 -
11 -* Support for [[Dataflows>>doc:sdmx:Glossary.Dataflow.WebHome]] to reference a subset of [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] from a [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]
12 -* Simplification to Data (% style="color:#e74c3c" %)[[Constraints>>doc:sdmx:Glossary.Constraint.WebHome]]
13 -* Addition of Availability (% style="color:#e74c3c" %)[[Constraints>>doc:sdmx:Glossary.Constraint.WebHome]]
14 -
15 -**Documentation**
16 -
17 -Registering [[Reference Metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] removed from documentation, to align with XML Registration object which is unable to reference a Metadata Provision, and REST API which is unable to query for registered [[reference metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] sources.
18 -
19 -**Breaking Changes**
20 -
21 -* Remove (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]](%%) property on Categorisation
22 -* Removal of Advanced [[Release Calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]]
23 -
24 -**Content of the Document**
25 -
26 -The remainder of this document contains a summary of the changes. More detailed information can be found in the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 Technical Specifications, in particular:
27 -
28 -Section 2 – Information Model
29 -
30 -Section 5 – Registry Specification
31 -
32 -Section 6 – Technical Notes
33 -
34 -[[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] TWG GitHub for the REST API and the XML and JSON formats
35 -
36 -= 2. Summary of Breaking Changes in 3.1 =
37 -
38 -Version 3.1 introduces breaking changes, in the model in the following areas:
39 -
40 -== 2.1 Removal of Advanced Release Calendar ==
41 -
42 -The Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) was simplified to become a cohesive structural [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]] focussed solely on the restriction of values that can be reported. As part of this remodelling the Advanced [[Release Calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]] was removed as it does not play a restrictive role.
43 -
44 -//Guidance for Implementors//
45 -[[Reference Metadata>>doc:sdmx:Glossary.Reference metadata.WebHome]] reported against a [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] and / or [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] can be used as an alternative to the Advanced [[Release Calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]].
46 -
47 -== 2.2 Removal of Version on Categorisation ==
48 -
49 -The Categorisation structural [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]] has no use case for undergoing (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]](%%) changes, the (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]](%%) was therefore removed.
50 -
51 -//Guidance for Implementors//
52 -If multiple (% style="color:#e74c3c" %)[[versions>>doc:sdmx:Glossary.Version.WebHome]](%%) of a Categorisation exist where the source or target differs, these Categorisations should be given a unique ID.
53 -
54 -= 3. Information Model =
55 -
56 -The changes to the information model support two distinct use cases:
57 -
58 -1. Horizontally complex [[Data Structure Definitions>>doc:sdmx:Glossary.Data structure definition.WebHome]] (DSDs)
59 -1. Additional cohesion to the Data (% style="color:#e74c3c" %)[[Constraints>>doc:sdmx:Glossary.Constraint.WebHome]](%%) model
60 -
61 -These changes are described in below.
62 -
63 -== 3.1 Horizontally Complex Data Structure Definitions ==
64 -
65 -An explanation of this use case, with additional details can be found under Section 6 - Technical Notes, under heading ‘10.3 [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%)’.
66 -
67 -The following changes to the model have been made to satisfy this use case.
68 -
69 -**Data Structure Definition**
70 -
71 -The [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] has a new ‘evolving structure’ property, this is a Boolean property, when set to ‘true’ it indicates to the users of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] that new [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] may be added without the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] undergoing a change to its major (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]](%%) number.
72 -
73 -**Dataflow**
74 -
75 -The [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] has a new [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) property, which is used to reference a subset of [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] which it uses from the referenced [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]].
76 -
77 -The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) fixes the [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] of the [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] enabling the referenced [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] to have new [[Dimensions>>doc:sdmx:Glossary.Dimension.WebHome]] added without the need to change the major (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]](%%) number.
78 -
79 -The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) property is only required if the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] sets the evolving structure property to true.
80 -
81 -== 3.2 Constraint Cohesion ==
82 -
83 -The (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) model in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 has been made more cohesive by separating the Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) into two distinct structures; the Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) which describes reporting restrictions, and the Availability (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%), which describes data content from a [[data source>>doc:sdmx:Glossary.Data source.WebHome]]. In [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 these distinctions were made using the ‘type’ property on a Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%).
84 -
85 -**Data [[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]]**
86 -
87 -The Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) has had the ‘type’ property removed; the Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 is always used to describe restrictions on content for data reporting purposes.
88 -
89 -The attachment of the Data (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 included [[Data Sources>>doc:sdmx:Glossary.Data source.WebHome]], in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.1 these attachments have been removed as these are not relevant for restricting reported data.
90 -
91 -**Availability [[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]]**
92 -
93 -The Availability (% style="color:#e74c3c" %)[[Constraint>>doc:sdmx:Glossary.Constraint.WebHome]](%%) is a new Structure introduced to describe data that exists, it is generated in the response to the Availability REST API. It is not a maintained structure, and as such has no [[maintenance agency>>doc:sdmx:Glossary.Maintenance agency.WebHome]], identity or (% style="color:#e74c3c" %)[[version>>doc:sdmx:Glossary.Version.WebHome]]
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SKMS.Methodology.Code.MethodologyClass[0]
SUZ.Methodology.Code.MethodologyClass[0]