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Last modified by Helena on 2025/09/10 11:19
From version 7.6
edited by Helena
on 2025/05/14 13:37
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To version 5.1
edited by Helena
on 2025/05/14 13:26
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Summary

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1 -{{box title="**Contents**"}}
2 -{{toc/}}
3 -{{/box}}
4 -
5 5  **Revision History**
6 6  
7 -(% style="width:738.039px" %)
8 -|(% style="width:187px" %)Revision|(% style="width:157px" %)Date|(% style="width:390px" %)Contents
9 -|(% style="width:187px" %)DRAFT 1.0|(% style="width:157px" %)May 2021|(% style="width:390px" %)Draft release updated for SDMX 3.0 for public consultation
10 -|(% style="width:187px" %)1.0|(% style="width:157px" %)October 2021|(% style="width:390px" %)Public Release for SDMX 3.0
3 +|Revision|Date|Contents
4 +|DRAFT 1.0|May 2021|Draft release updated for SDMX 3.0 for public consultation
5 +|1.0|October 2021|Public Release for SDMX 3.0
11 11  
12 12  = 1 Overview =
13 13  
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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"]])
23 +• Adoption of the three-number semantic versioning standard for structural metadata artefacts [[(>>url:https://semver.org/]][[__https:~~/~~/semver.org__>>url:https://semver.org/]][[)>>url:https://semver.org/]]
29 29  
30 30  **REST Web Services Application Programming Interface (API)**
31 31  
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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**;**
34 +• The SOAP web services API has been deprecated with version 3.0 standardising on REST** **
40 40  
41 41  **XML, JSON, CSV and EDI Transmission formats**
42 42  
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67 67  
68 68  == //2.1 Web Services API// ==
69 69  
70 -(% style="width:948.039px" %)
71 -|**REST API**|(% style="width:818px" %)(((
65 +|**REST API**|(((
72 72  The REST API is not backwardly compatible due to modifications to the URLs and query parameters resulting in breaking changes in four of the five main resources:
73 73  
74 74  * Structure queries
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84 84  
85 85  Implementors are also recommended to version their API services providing users with an explicit choice of which version to use.
86 86  )))
87 -|**SOAP API**|(% style="width:818px" %)The SOAP API has been deprecated.
81 +|**SOAP API**|The SOAP API has been deprecated.
88 88  
89 89  == //2.2 Transmission Formats// ==
90 90  
91 -:
85 +:
92 92  
93 93  (((
94 -(% style="width:952.039px" %)
95 -|(% style="width:130px" %)**SDMX-ML**|(% style="width:820px" %)(((
88 +|**SDMX-ML**|(((
96 96  The following legacy XML data messages have been deprecated:
97 97  
98 98  SDMX-ML 1.0/2.0 Generic (time-series) data message
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108 108  The SDMX-ML structure message is not backwardly compatible primarily due to:
109 109  
110 110  * Changes to the information model
111 -* Changes to the way the structures are organised into ‘collections’ within the message
104 +* Changes to the way the structures are organised into
105 +
106 +‘collections’ within the message
107 +
112 112  * Deprecation of the Agency, ID, Version option for referencing of structures in messages
113 113  )))
114 -|(% style="width:130px" %)**SDMX-JSON**|(% style="width:820px" %)(((
110 +|**SDMX-JSON**|(((
115 115  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.
116 116  
117 117  The JSON structure message is not backwardly compatible primarily due to:
118 118  
119 119  * Changes to the information model
120 -* Changes to the way the structures are organised into ‘collections’ within the message
116 +* Changes to the way the structures are organised into
117 +
118 +‘collections’ within the message
119 +
121 121  * Deprecation of the Agency, ID, Version option for referencing of structures in messages
122 122  )))
123 -|(% style="width:130px" %)**SDMX-EDI**|(% style="width:820px" %)The EDI format for both structures and data has been deprecated.
124 -|(% 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.**     **
122 +|**SDMX-EDI**|The EDI format for both structures and data has been deprecated.
123 +|**SDMX-CSV**|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.**     **
125 125  )))
126 126  
127 127  == //2.3 Information Model// ==
128 128  
128 +:
129 +
129 129  (((
130 -(% style="width:955.039px" %)
131 -|(% style="width:132px" %)**Data Structure Definition**|(% style="width:819px" %)(((
131 +|**Data Structure Definition**|(((
132 132  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.
133 133  
134 134  //Conversion guidance for implementors//
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137 137  
138 138  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.
139 139  )))
140 -|(% style="width:132px" %)**Structure mapping model**|(% style="width:819px" %)(((
140 +|**Structure mapping model**|(((
141 141  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.
142 142  
143 143  //Conversion guidance for implementors//
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146 146  
147 147  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.
148 148  )))
149 -|(% style="width:132px" %)**Reference metadata model**|(% style="width:819px" %)(((
149 +|**Reference metadata model**|(((
150 150  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.
151 151  
152 152  Version 2.1 reference metadata models are not valid in version 3.0.
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155 155  
156 156  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
157 157  )))
158 -|(% style="width:132px" %) |(% style="width:819px" %)(((
158 +||(((
159 159  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.
160 160  
161 161  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.
162 162  )))
163 -|(% style="width:132px" %)**Constraint model**|(% style="width:819px" %)(((
163 +|**Constraint model**|(((
164 164  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.
165 165  
166 166  //Conversion guidance for implementors//
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169 169  
170 170  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.
171 171  )))
172 -|(% style="width:132px" %)**Hierarchical codelist structures**|(% style="width:819px" %)(((
172 +|**Hierarchical codelist structures**|(((
173 173  The version 2.1 Hierarchical Codelist artefact has been deprecated in version 3.0 and replaced by two new artefacts, Hierarchy and Hierarchy Association.
174 174  
175 175  //Conversion guidance for implementors//
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503 503  
504 504  = 4 Versioning of Structural Metadata Artefacts =
505 505  
506 -Version 3.0 adopts semantic versioning principles for versioning of metadata artefacts following the rules set out at __[[https:~~/~~/semver.org>>https://semver.org]] __However, this is not mandatory, and organisations may continue to use the pre-existing two-digit versioning strategy, or not to version artefacts by omitting the //version// property. The version number no longer defaults to 1.0 if not explicitly set.
506 +Version 3.0 adopts semantic versioning principles for versioning of metadata artefacts following the rules set out at [[__https:~~/~~/semver.org__>>url:https://semver.org/]][[.>>url:https://semver.org/]] However, this is not mandatory, and organisations may continue to use the pre-existing two-digit versioning strategy, or not to version artefacts by omitting the //version// property. The version number no longer defaults to 1.0 if not explicitly set.
507 507  
508 508  Semantic version numbers are three digits:
509 509  
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585 585  
586 586  /data/dataflow/ESTAT/ICP?c[REF_AREA]=DE&c[ICP_ITEM]=sw:01&c[TIME_PERIOD]=ge:2015 Operators include:
587 587  
588 -(% style="width:531.039px" %)
589 -|(% style="width:151px" %)eq|(% style="width:378px" %)Equals
590 -|(% style="width:151px" %)ne|(% style="width:378px" %)Not equal to
591 -|(% style="width:151px" %)le|(% style="width:378px" %)Less than
592 -|(% style="width:151px" %)ge|(% style="width:378px" %)Greater than or equal to
593 -|(% style="width:151px" %)sw|(% style="width:378px" %)Starts with
588 +|eq|Equals
589 +|ne|Not equal to
590 +|le|Less than
591 +|ge|Greater than or equal to
592 +|sw|Starts with
594 594  
595 595  === Support for multiple keys ===
596 596  
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632 632  
633 633  Additionally, the way the individual artefacts are organised into ‘collections’ within the message has been significantly revised with a simpler flat structure adopted as set out in the following table:
634 634  
635 -(% style="width:1102.04px" %)
636 -|(% style="width:321px" %)**Artefact type**|(% style="width:351px" %)**Version 2.1 Collection**|(% style="width:426px" %)**Version 3.0 Collection**
637 -|(% style="width:321px" %)AgencyScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)AgencySchemes
638 -|(% style="width:321px" %)DataConsumerScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataConsumerSchemes
639 -|(% style="width:321px" %)DataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataProviderSchemes
640 -|(% style="width:321px" %)MetadataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)MetadataProviderSchemes
641 -|(% style="width:321px" %)OrganisationUnitScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)OrganisationUnitSchemes
642 -|(% style="width:321px" %)GeographicCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeographicCodelists
643 -|(% style="width:321px" %)GeoGridCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeoGridCodelists
644 -|(% style="width:321px" %)ConceptScheme|(% style="width:351px" %)Concepts|(% style="width:426px" %)ConceptSchemes
645 -|(% style="width:321px" %)ValueList|(% style="width:351px" %)Codelists|(% style="width:426px" %)ValueLists
646 -|(% style="width:321px" %)StructureMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)StructureMaps
647 -|(% style="width:321px" %)RepresentationMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)RepresentationMaps
648 -|(% style="width:321px" %)ConceptSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ConceptSchemeMaps
649 -|(% style="width:321px" %)CategorySchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)CategorySchemeMaps
650 -|(% style="width:321px" %)OrganisationSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)OrganisationSchemeMaps
651 -|(% style="width:321px" %)ReportingTaxonomyMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ReportingTaxonomyMaps
652 -|(% style="width:321px" %)DataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)DataConstraints
653 -|(% style="width:321px" %)MetadataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)MetadataConstraints
654 -|(% style="width:321px" %)MetadataProvisionAgreement|(% style="width:351px" %)ProvisionAgreement|(% style="width:426px" %)MetadataProvisionAgreements
655 -|(% style="width:321px" %)CustomTypeScheme|(% style="width:351px" %)CustomTypes|(% style="width:426px" %)CustomTypeSchemes
656 -|(% style="width:321px" %)VtlMappingScheme|(% style="width:351px" %)VtlMappings|(% style="width:426px" %)VtlMappingSchemes
657 -|(% style="width:321px" %)NamePersonalisationScheme|(% style="width:351px" %)NamePersonalisations|(% style="width:426px" %)NamePersonalisationSchemes
658 -|(% style="width:321px" %)RulesetScheme|(% style="width:351px" %)Rulesets|(% style="width:426px" %)RulesetSchemes
659 -|(% style="width:321px" %)TransformationScheme|(% style="width:351px" %)Transformations|(% style="width:426px" %)TransformationSchemes
660 -|(% style="width:321px" %)UserDefinedOperatorScheme|(% style="width:351px" %)UserDefinedOperators|(% style="width:426px" %)UserDefinedOperatorSchemes
634 +|**Artefact type**|**Version 2.1 Collection**|**Version 3.0 Collection**
635 +|AgencyScheme|OrganisationSchemes|AgencySchemes
636 +|DataConsumerScheme|OrganisationSchemes|DataConsumerSchemes
637 +|DataProviderScheme|OrganisationSchemes|DataProviderSchemes
638 +|MetadataProviderScheme|OrganisationSchemes|MetadataProviderSchemes
639 +|OrganisationUnitScheme|OrganisationSchemes|OrganisationUnitSchemes
640 +|GeographicCodelist|Codelists|GeographicCodelists
641 +|GeoGridCodelist|Codelists|GeoGridCodelists
642 +|ConceptScheme|Concepts|ConceptSchemes
643 +|ValueList|Codelists|ValueLists
644 +|StructureMap|StructureMappings|StructureMaps
645 +|RepresentationMap|StructureMappings|RepresentationMaps
646 +|ConceptSchemeMap|StructureMappings|ConceptSchemeMaps
647 +|CategorySchemeMap|StructureMappings|CategorySchemeMaps
648 +|OrganisationSchemeMap|StructureMappings|OrganisationSchemeMaps
649 +|ReportingTaxonomyMap|StructureMappings|ReportingTaxonomyMaps
650 +|DataConstraint|Constraints|DataConstraints
651 +|MetadataConstraint|Constraints|MetadataConstraints
652 +|MetadataProvisionAgreement|ProvisionAgreement|MetadataProvisionAgreements
653 +|CustomTypeScheme|CustomTypes|CustomTypeSchemes
654 +|VtlMappingScheme|VtlMappings|VtlMappingSchemes
655 +|NamePersonalisationScheme|NamePersonalisations|NamePersonalisationSchemes
656 +|RulesetScheme|Rulesets|RulesetSchemes
657 +|TransformationScheme|Transformations|TransformationSchemes
658 +|UserDefinedOperatorScheme|UserDefinedOperators|UserDefinedOperatorSchemes
661 661  
662 662  No changes have been made to the way the following artefacts are organised in the structure message:
663 663  
664 -(% style="width:1106.04px" %)
665 -|(% style="width:326px" %)**Artefact type**|(% style="width:776px" %)**Collection**
666 -|(% style="width:326px" %)Dataflow|(% style="width:776px" %)Dataflows
667 -|(% style="width:326px" %)Metadataflow|(% style="width:776px" %)Metadataflows
668 -|(% style="width:326px" %)CategoryScheme|(% style="width:776px" %)CategorySchemes
669 -|(% style="width:326px" %)Categorisation|(% style="width:776px" %)Categorisations
670 -|(% style="width:326px" %)Codelist|(% style="width:776px" %)Codelists
671 -|(% style="width:326px" %)Hierarchy|(% style="width:776px" %)Hierarchies
672 -|(% style="width:326px" %)HierarchyAssociation|(% style="width:776px" %)HierarchyAssociations
673 -|(% style="width:326px" %)MetadataStructure|(% style="width:776px" %)MetadataStructures
674 -|(% style="width:326px" %)DataStructure|(% style="width:776px" %)DataStructures
675 -|(% style="width:326px" %)ReportingTaxonomy|(% style="width:776px" %)ReportingTaxonomies
676 -|(% style="width:326px" %)Process|(% style="width:776px" %)Processes
677 -|(% style="width:326px" %)ProvisionAgreement|(% style="width:776px" %)ProvisionAgreements
662 +|**Artefact type**|**Collection**
663 +|Dataflow|Dataflows
664 +|Metadataflow|Metadataflows
665 +|CategoryScheme|CategorySchemes
666 +|Categorisation|Categorisations
667 +|Codelist|Codelists
668 +|Hierarchy|Hierarchies
669 +|HierarchyAssociation|HierarchyAssociations
670 +|MetadataStructure|MetadataStructures
671 +|DataStructure|DataStructures
672 +|ReportingTaxonomy|ReportingTaxonomies
673 +|Process|Processes
674 +|ProvisionAgreement|ProvisionAgreements
678 678  
679 679  From version 3.0, collections can appear in any order within a structure message.
680 680  
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