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Last modified by Artur on 2025/09/13 19:50
From version 3.1
edited by Helena
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To version 1.1
edited by Helena
on 2025/07/01 17:47
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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 -Artefact|Data source|Data structure definition|Dataflow|Dimension|Maintenance agency|Provision agreement|Reference metadata|Release policy - release calendar|Statistical data and metadata exchange
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9 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 10  |(% style="width:154px" %)1.0|(% style="width:249px" %)May 2025|(% style="width:586px" %)Public release for SDMX 3.1
11 11  
12 -= 1. Overview =
13 -
14 -[[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:
15 -
16 -**Information Model**
17 -
18 -* 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]]
19 -* Simplification to Data (% style="color:#e74c3c" %)Constraints
20 -* Addition of Availability (% style="color:#e74c3c" %)Constraints
21 -
22 -**Documentation**
23 -
24 -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.
25 -
26 -**Breaking Changes**
27 -
28 -* Remove (% style="color:#e74c3c" %)version(%%) property on Categorisation
29 -* Removal of Advanced [[Release Calendar>>doc:sdmx:Glossary.Release policy - release calendar.WebHome]]
30 -
31 -**Content of the Document**
32 -
33 -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:
34 -
35 -Section 2 – Information Model
36 -
37 -Section 5 – Registry Specification
38 -
39 -Section 6 – Technical Notes
40 -
41 -[[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] TWG GitHub for the REST API and the XML and JSON formats
42 -
43 -= 2. Summary of Breaking Changes in 3.1 =
44 -
45 -(% style="color:#e74c3c" %)Version(%%) 3.1 introduces breaking changes, in the model in the following areas:
46 -
47 -== 2.1 Removal of Advanced Release Calendar ==
48 -
49 -The Data (% style="color:#e74c3c" %)Constraint(%%) 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.
50 -
51 -//Guidance for Implementors//
52 -[[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]].
53 -
54 -== 2.2 Removal of Version on Categorisation ==
55 -
56 -The Categorisation structural [[artefact>>doc:sdmx:Glossary.Artefact.WebHome]] has no use case for undergoing (% style="color:#e74c3c" %)version(%%) changes, the (% style="color:#e74c3c" %)version(%%) was therefore removed.
57 -
58 -//Guidance for Implementors//
59 -If multiple (% style="color:#e74c3c" %)versions(%%) of a Categorisation exist where the source or target differs, these Categorisations should be given a unique ID.
60 -
61 -= 3. Information Model =
62 -
63 -The changes to the information model support two distinct use cases:
64 -
65 -1. Horizontally complex [[Data Structure Definitions>>doc:sdmx:Glossary.Data structure definition.WebHome]] (DSDs)
66 -1. Additional cohesion to the Data (% style="color:#e74c3c" %)Constraints(%%) model
67 -
68 -These changes are described in below.
69 -
70 -== 3.1 Horizontally Complex Data Structure Definitions ==
71 -
72 -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(%%)’.
73 -
74 -The following changes to the model have been made to satisfy this use case.
75 -
76 -**Data Structure Definition**
77 -
78 -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(%%) number.
79 -
80 -**Dataflow**
81 -
82 -The [[Dataflow>>doc:sdmx:Glossary.Dataflow.WebHome]] has a new [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) 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]].
83 -
84 -The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) 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(%%) number.
85 -
86 -The [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)Constraint(%%) property is only required if the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]] sets the evolving structure property to true.
87 -
88 -== 3.2 Constraint Cohesion ==
89 -
90 -The (% style="color:#e74c3c" %)Constraint(%%) 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(%%) into two distinct structures; the Data (% style="color:#e74c3c" %)Constraint(%%) which describes reporting restrictions, and the Availability (% style="color:#e74c3c" %)Constraint(%%), 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(%%).
91 -
92 -**Data Constraint**
93 -
94 -The Data (% style="color:#e74c3c" %)Constraint(%%) has had the ‘type’ property removed; the Data (% style="color:#e74c3c" %)Constraint(%%) 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.
95 -
96 -The attachment of the Data (% style="color:#e74c3c" %)Constraint(%%) 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.
97 -
98 -**Availability Constraint**
99 -
100 -The Availability (% style="color:#e74c3c" %)Constraint(%%) 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
12 +