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

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Title

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1		-1 Overview
	1	+SDMX 3.0 Standards. Summary of Major Changes and New Functionality

Parent

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	1	+Methodology.WebHome

Author

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1		-xwiki:XWiki.helena
	1	+xwiki:XWiki.arturkryazhev

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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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	1	+{{box title="**Contents**"}}
	2	+{{toc/}}
	3	+{{/box}}
	4	+
1	1	**Revision History**
2	2
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
	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
6	6
7	7	= 1 Overview =
8	8
9		-SDMX version 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
	14	+[[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] version 3.0 introduces new features, improvements and changes to the Standard in the following key areas:
10	10
11	11	**Information Model**
12	12
13		-* Simplification and improvement of the reference metadata model
	18	+* Simplification and improvement of the [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] model
14	14	* Support for microdata
15	15	* Support for geospatial data
16		-* Support for code list extension and discriminated union of code lists
	21	+* Support for [[code list>>doc:Glossary.Code list.WebHome]] extension and discriminated union of [[code>>doc:Glossary.Code.WebHome]] lists
17	17	* Improvements to structure mapping
18		-* Improvements to code hierarchies for data discovery
	23	+* Improvements to [[code>>doc:Glossary.Code.WebHome]] [[hierarchies>>doc:Glossary.Hierarchy.WebHome]] for data discovery
19	19	* Improvements to constraints
20	20
21	21	**Versioning of Structural Metadata Artefacts**
22	22
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/]]
	28	+* Adoption of the three-number semantic versioning standard for [[structural metadata>>doc:Glossary.Structural metadata.WebHome]] [[artefacts>>doc:Glossary.Artefact.WebHome]] ([[https:~~/~~/semver.org/>>https://semver.org/||rel="noopener noreferrer" target="_blank"]])
24	24
25	25	**REST Web Services Application Programming Interface (API)**
26	26
27	27	* Change to a single ‘structure’ resource for structure queries simplifying the REST API specification by reducing the number of resources to five
28	28	* Improvements to data queries
29		-* Improvements to reference metadata queries
30		-* Support for structural metadata maintenance using HTTP PUT, POST and DELETE verbs
	34	+* Improvements to [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] queries
	35	+* Support for [[structural metadata>>doc:Glossary.Structural metadata.WebHome]] maintenance using HTTP PUT, POST and DELETE verbs
31	31
32	32	**SOAP Web Services API**
33	33
34		-• 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 version 3.0 standardising on REST**;**
35	35
36	36	**XML, JSON, CSV and EDI Transmission formats**
37	37
38		-* 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
39		-* 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
40		-* The SDMX-EDI transmission format for structures and data has been deprecated
41		-* The organisation of structures into ‘collections’ in SDMX-ML and SDMX-JSON structure messages has been flattened and simplified
42		-* 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:Glossary.SDMX-ML.WebHome]], [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] and [[SDMX>>doc: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:Glossary.Reference metadata.WebHome]] and microdata
	44	+* Obsolete [[SDMX-ML>>doc: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:Glossary.SDMX-EDI.WebHome]] transmission format for structures and data has been deprecated
	46	+* The organisation of structures into ‘collections’ in [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] structure messages has been flattened and simplified
	47	+* The option to reference structures in [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] messages using Agency, ID and [[Version>>doc:Glossary.Version.WebHome]] has been deprecated with URN now exclusively used for all non-local referencing purpose
43	43
44	44	**Breaking Changes**
45	45
...	...	@@ -49,20 +49,21 @@
49	49
50	50	**Content of the Document**
51	51
52		-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:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 Technical Specifications, in particular:
53	53
54	54	* Section 2 – Information Model
55	55	* Section 5 – Registry Specification
56	56	* Section 6 – Technical Notes
57		-* SDMX-TWG GitHub for the REST API and the XML, JSON and CSV formats
	62	+* [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]]-TWG GitHub for the REST API and the XML, JSON and CSV formats
58	58
59	59	= 2 Summary of Breaking Changes in 3.0 =
60	60
61	61	Version 3.0 introduces breaking changes into the web services API, transmission formats and information model. A summary is given in the table below.
62	62
63		-== //2.1 Web Services API// ==
	68	+== 2.1 Web Services API ==
64	64
65		-|**REST API**|(((
	70	+(% style="width:948.039px" %)
	71	+|**REST API**|(% style="width:818px" %)(((
66	66	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:
67	67
68	68	* Structure queries
...	...	@@ -71,111 +71,87 @@
71	71	* Availability queries
72	72
73	73	Schema queries are backwardly compatible.
74		-
75	75	//Guidance for implementors//
76	76
77	77	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.
78		-
79	79	Implementors are also recommended to version their API services providing users with an explicit choice of which version to use.
80	80	)))
81		-|**SOAP API**|The SOAP API has been deprecated.
	85	+|**SOAP API**|(% style="width:818px" %)The SOAP API has been deprecated.
82	82
83		-== //2.2 Transmission Formats// ==
	87	+== 2.2 Transmission Formats ==
84	84
85		-:
86		-
87	87	(((
88		-|**SDMX-ML**|(((
	90	+(% style="width:952.039px" %)
	91	+|(% style="width:130px" %)**SDMX-ML**|(% style="width:820px" %)(((
89	89	The following legacy XML data messages have been deprecated:
90	90
91		-SDMX-ML 1.0/2.0 Generic (time-series) data message
	94	+[[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Generic (time-series) data message
	95	+[[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Compact (time-series) data message
	96	+[[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Utility (time-series) data message
	97	+[[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Cross-Sectional data message [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 2.1 Generic data messages (for observations, time-series and cross-sectional data)
	98	+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>>doc:Glossary.Data structure definition.WebHome]], [[Dataflow>>doc:Glossary.Dataflow.WebHome]] and [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] using their Agency, ID and [[Version>>doc:Glossary.Version.WebHome]]. The time series variant of the message has also been deprecated.
	99	+The [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] structure message is not backwardly compatible primarily due to:
92	92
93		-SDMX-ML 1.0/2.0 Compact (time-series) data message
94		-
95		-SDMX-ML 1.0/2.0 Utility (time-series) data message
96		-
97		-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)
98		-
99		-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.
100		-
101		-The SDMX-ML structure message is not backwardly compatible primarily due to:
102		-
103	103	* Changes to the information model
104		-* Changes to the way the structures are organised into
105		-
106		-‘collections’ within the message
107		-
108		-* Deprecation of the Agency, ID, Version option for referencing of structures in messages
	102	+* Changes to the way the structures are organised into ‘collections’ within the message
	103	+* Deprecation of the Agency, ID, [[Version>>doc:Glossary.Version.WebHome]] option for referencing of structures in messages
109	109	)))
110		-|**SDMX-JSON**|(((
111		-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.
112		-
	105	+|(% style="width:130px" %)**SDMX-JSON**|(% style="width:820px" %)(((
	106	+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>>doc:Glossary.Data set.WebHome]] with potentially different Data Structure Definitions.
113	113	The JSON structure message is not backwardly compatible primarily due to:
114	114
115	115	* Changes to the information model
116		-* Changes to the way the structures are organised into
117		-
118		-‘collections’ within the message
119		-
120		-* Deprecation of the Agency, ID, Version option for referencing of structures in messages
	110	+* Changes to the way the structures are organised into ‘collections’ within the message
	111	+* Deprecation of the Agency, ID, [[Version>>doc:Glossary.Version.WebHome]] option for referencing of structures in messages
121	121	)))
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.**     **
	113	+|(% style="width:130px" %)**SDMX-EDI**|(% style="width:820px" %)The EDI format for both structures and data has been deprecated.
	114	+|(% style="width:130px" %)**SDMX-CSV**|(% style="width:820px" %)The CSV data and [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] messages are not backwardly compatible with those under (% style="color:#e74c3c" %)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.
124	124	)))
125	125
126		-== //2.3 Information Model// ==
	117	+== 2.3 Information Model ==
127	127
128		-:
129		-
130	130	(((
131		-|**Data Structure Definition**|(((
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.
	120	+(% style="width:955.039px" %)
	121	+|(% style="width:132px" %)**Data Structure Definition**|(% style="width:819px" %)(((
	122	+The version 3.0 [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] ([[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]]) 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//
135	135
136		-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.
137		-
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.
	126	+Version 2.1 DSDs can be converted to the 3.0 model by creating a [[measure>>doc:sdmx:Glossary.Measure.WebHome]] with the “[[MEASURE>>doc:sdmx:Glossary.Measure.WebHome]]” [[concept>>doc:sdmx:Glossary.Concept.WebHome]] role applied as described in paragraph 3.5.
	127	+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:sdmx:Glossary.Measure.WebHome]] and value arrays for [[measures>>doc:sdmx:Glossary.Measure.WebHome]] and [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]].
139	139	)))
140		-|**Structure mapping model**|(((
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.
	129	+|(% style="width:132px" %)**Structure mapping model**|(% style="width:819px" %)(((
	130	+The structure mapping model has changed significantly in version 3.0 with deprecation of the [[Structure Set>>doc:Glossary.Structure set.WebHome]] [[maintainable artefact>>doc:Glossary.Maintainable artefact.WebHome]] and introduction of five new ones: [[Representation>>doc:Glossary.Representation.WebHome]] Map and four variants of [[item scheme>>doc:Glossary.Item scheme.WebHome]] map.
142	142
143	143	//Conversion guidance for implementors//
144	144
145		-Version 2.1 structure sets can be practically converted to the version 3.0 structure mapping model.
146		-
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.
	134	+Version 2.1 [[structure sets>>doc:Glossary.Structure set.WebHome]] can be practically converted to the version 3.0 structure mapping model.
	135	+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>>doc:Glossary.Structure set.WebHome]] 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>>doc:Glossary.Maintainable artefact.WebHome]], but details of the original [[Structure Set>>doc:Glossary.Structure set.WebHome]] [[artefacts>>doc:Glossary.Artefact.WebHome]] are lost.
148	148	)))
149		-|**Reference metadata model**|(((
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.
	137	+|(% style="width:132px" %)**Reference metadata model**|(% style="width:819px" %)(((
	138	+The [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] model has changed in version 3.0 with modifications to the role of the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]], [[Metadata Structure Definition>>doc:Glossary.Metadata structure definition.WebHome]] and [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] [[artefacts>>doc:Glossary.Artefact.WebHome]]. Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] and Metadata Provider Scheme have been added. Metadatasets are now identifiable.
151	151
152		-Version 2.1 reference metadata models are not valid in version 3.0.
	140	+Version 2.1 [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] models are not valid in version 3.0.
153	153
154	154	//Conversion guidance for implementors//
155	155
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
	144	+A version 2.1 [[Metadata Structure Definition>>doc:Glossary.Metadata structure definition.WebHome]] 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>>doc:Glossary.Metadataflow.WebHome]]. Further, conversion of a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]] for collecting [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] against a [[dataset>>doc:Glossary.Data set.WebHome]] would need to make changes to the [[dataset>>doc:Glossary.Data set.WebHome]]’s [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]]. As the [[Data Structure Definition>>doc: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:Glossary.Data set.WebHome]]. 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>>doc:Glossary.Provision agreement.WebHome]] which would need to be created if not already in existence.
	145	+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>>doc:Glossary.Metadataflow.WebHome]] and Metadata [[Provision Agreements>>doc:Glossary.Provision agreement.WebHome]]. Depending on the complexity it may not be possible to express that information in a version 2.1 [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
157	157	)))
158		-||(((
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.
	147	+|(% style="width:132px" %)**Constraint model**|(% style="width:819px" %)(((
	148	+The version 2.1 Content [[Constraint>>doc:Glossary.Constraint.WebHome]] [[artefact>>doc:Glossary.Artefact.WebHome]] has been deprecated in version 3.0 and replaced by the Data Constraint for data, and the Metadata [[Constraint>>doc:Glossary.Constraint.WebHome]] for reference metadata.
160	160
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		-)))
163		-|**Constraint model**|(((
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		-
166	166	//Conversion guidance for implementors//
167	167
168		-2.1 Content Constraints can be converted without loss to the equivalent version 3.0 Data Constraint model.
169		-
	152	+2.1 Content [[Constraint>>doc:Glossary.Constraint.WebHome]] can be converted without loss to the equivalent version 3.0 Data Constraint model.
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		-|**Hierarchical codelist structures**|(((
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.
	155	+|(% style="width:132px" %)**Hierarchical codelist structures**|(% style="width:819px" %)(((
	156	+The version 2.1 Hierarchical Codelist [[artefact>>doc:Glossary.Artefact.WebHome]] has been deprecated in version 3.0 and replaced by two new [[artefacts>>doc:Glossary.Artefact.WebHome]], [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] and [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] Association.
174	174
175	175	//Conversion guidance for implementors//
176	176
177		-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.
178		-
	160	+Version 2.1 Hierarchical Codelists can be successfully converted to the version 3.0 [[hierarchy>>doc:Glossary.Hierarchy.WebHome]] model. Information on which [[artefacts>>doc:Glossary.Artefact.WebHome]] to link the [[hierarchies>>doc:Glossary.Hierarchy.WebHome]] to on what context would need to be added as a separate procedure.
179	179	Conversion from the version 3.0 model to version 2.1 is possible, but with loss of the linking information
180	180	)))
181	181	)))
...	...	@@ -182,17 +182,17 @@
182	182
183	183	= 3 Information Model =
184	184
185		-== //3.1 Version 3.0 Information Model// ==
	167	+== 3.1 Version 3.0 Information Model ==
186	186
187	187	[[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_6fc573fe.png||height="404" width="718"]]
188	188
189	189	//Figure 1 Version 3.0 simplified Information Model UML class diagram with ‘heat map’ illustrating the areas with most change//
190	190
191		-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.
	173	+The schematic above is a simplified UML class diagram of the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 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.
192	192
193		-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.
	175	+A number of ancillary structures including organisation schemes, process and [[reporting taxonomy>>doc:Glossary.Reporting taxonomy.WebHome]] are unchanged and have not been shown. Similarly, Organisation Scheme Map and [[Reporting Taxonomy>>doc:Glossary.Reporting taxonomy.WebHome]] Map have been omitted for simplicity. A schematic of the 2.1 model is given in Appendix A for comparison purposes.
194	194
195		-== //3.2 Key Changes from Version 2.1// ==
	177	+== 3.2 Key Changes from Version 2.1 ==
196	196
197	197	New Maintainable Artefacts
198	198
...	...	@@ -199,15 +199,15 @@
199	199	* Structure Map
200	200	* Representation Map
201	201	* Organisation Scheme Map
202		-* Concept Scheme Map
	184	+* [[Concept>>doc:sdmx:Glossary.Concept.WebHome]] Scheme Map
203	203	* Category Scheme Map
204	204	* Reporting Taxonomy Map
205	205	* Value List
206		-* Hierarchy
207		-* Hierarchy Association
208		-* Metadata Constraint
209		-* Data Constraint
210		-* Metadata Provision Agreement
	188	+* [[Hierarchy>>doc:sdmx:Glossary.Hierarchy.WebHome]]
	189	+* [[Hierarchy>>doc:sdmx:Glossary.Hierarchy.WebHome]] Association
	190	+* Metadata [[Constraint>>doc:Glossary.Constraint.WebHome]]
	191	+* Data [[Constraint>>doc:Glossary.Constraint.WebHome]]
	192	+* Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]]
211	211	* Metadata Provider Scheme
212	212	* Metadataset
213	213
...	...	@@ -219,42 +219,43 @@
219	219
220	220	Removed Maintainable Artefacts
221	221
222		-* Structure Set – replaced by Structure Map and the four item scheme maps
223		-* Hierarchical Codelist – replaced by Hierarchy and Hierarchy Association • Constraint – replaced by Data Constraint and Metadata Constraint
	204	+* Structure Set – replaced by Structure Map and the four [[item scheme>>doc:Glossary.Item scheme.WebHome]] maps
	205	+* Hierarchical Codelist – replaced by [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] and [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] Association
	206	+* [[Constraint>>doc:Glossary.Constraint.WebHome]] – replaced by Data [[Constraint>>doc:Glossary.Constraint.WebHome]] and Metadata [[Constraint>>doc:Glossary.Constraint.WebHome]]
224	224
225	225	Changed Maintainable Artefacts
226	226
227		-* Data Structure Definition – support for microdatasets and reference metadata linked to data
228		-* Metadataflow – simplifies exchange of reference metadata, in particular those linked to structures
229		-* Metadata Structure Definition – simplified model for reference metadata
	210	+* Data Structure Definition – support for microdatasets and [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] linked to data
	211	+* Metadataflow – simplifies exchange of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]], in particular those linked to structures
	212	+* Metadata Structure Definition – simplified model for [[reference metadata>>doc:Glossary.Reference metadata.WebHome]]
230	230	* Codelist – support for codelist extension and geospatial specialised codelists (GeographicCodelist, GeoGridCodelist)
231		-* VTL Mapping Scheme – VTL Concept Mapping Scheme removed to align the VTL / SDMX interface with the 3.0 model
	214	+* [[VTL>>doc:Glossary.Validation and transformation language.WebHome]] Mapping Scheme – [[VTL>>doc:Glossary.Validation and transformation language.WebHome]] Concept Mapping Scheme removed to align the [[VTL>>doc:Glossary.Validation and transformation language.WebHome]] / [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] interface with the 3.0 model
232	232
233		-New Component Representation Types
	216	+New [[Component>>doc:Glossary.Component.WebHome]] [[Representation>>doc:Glossary.Representation.WebHome]] Types
234	234
235	235	* GeospatialInformation – a string type where the value is an expression defining a set of geographical features using a purpose-designed syntax
236	236
237		-== //3.3 Areas Unchanged from Version 2.1// ==
	220	+== 3.3 Areas Unchanged from Version 2.1 ==
238	238
239	239	The following areas of the information model are unchanged from version 2.1:
240	240
241	241	* Categories
242		-* Concepts
243		-* Data providers
	225	+* [[Concepts>>doc:sdmx:Glossary.Concept.WebHome]]
	226	+* [[Data providers>>doc:sdmx:Glossary.Data provider.WebHome]]
244	244	* Agencies
245	245	* Data consumers
246		-* VTL transformation and expressions – with the exception of VTL mapping scheme as already noted
	229	+* [[VTL>>doc:Glossary.Validation and transformation language.WebHome]] transformation and expressions – with the exception of [[VTL>>doc:Glossary.Validation and transformation language.WebHome]] mapping scheme as already noted
247	247	* Reporting taxonomy
248	248	* Process
249	249
250		-== //3.4 Reference Metadata// ==
	233	+== 3.4 Reference Metadata ==
251	251
252		-Reference metadata has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
	235	+[[Reference metadata>>doc:Glossary.Reference metadata.WebHome]] has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
253	253
254		-=== Simplify Metadata Structure Definition ===
	237	+(% class="wikigeneratedid" id="HSimplifyMetadataStructureDefinition" %)
	238	+**Simplify Metadata Structure Definition**
	239	+The [[Metadata Structure Definition>>doc:Glossary.Metadata structure definition.WebHome]] ([[MSD>>doc:Glossary.Metadata structure definition.WebHome]]) has been simplified to remove target information, and the support of multiple report structures. The [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] now only contains Metadata [[Attributes>>doc:Glossary.Attribute.WebHome]] which are used to define the structure of a report.
255	255
256		-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.
257		-
258	258	[[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_ad5f5c97.png||height="346" width="494"]]
259	259
260	260	//Figure 2 version 2.1 Metadata Structure Definition (MSD)//
...	...	@@ -263,247 +263,189 @@
263	263
264	264	//Figure 3 the simplified version 3.0 MSD//
265	265
266		-=== Change to reference metadata reported against data ===
	249	+(% class="wikigeneratedid" id="HChangetoreferencemetadatareportedagainstdata" %)
	250	+**Change to reference metadata reported against data**
267	267
268		-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.
	252	+(% class="wikigeneratedid" id="HChangetoreferencemetadatareportedagainstdata" %)
	253	+[[Reference metadata>>doc:Glossary.Reference metadata.WebHome]] associated with [[datasets>>doc:Glossary.Data set.WebHome]], data series or observations are now reported with the data. The [[dataset>>doc:Glossary.Data set.WebHome]]’s [[DSD>>doc:Glossary.Data structure definition.WebHome]] must reference an [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] to define the structure of its [[reference metadata>>doc:Glossary.Reference metadata.WebHome]]. In practice [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] for data are transmitted as part of the data message. The metadata [[attributes>>doc:Glossary.Attribute.WebHome]] are treated in a similar way to the data [[attributes>>doc:Glossary.Attribute.WebHome]] appearing in the message at the [[dataset>>doc:Glossary.Data set.WebHome]], data series or individual observation level as appropriate. In contrast to simple data [[attributes>>doc:Glossary.Attribute.WebHome]], metadata [[attributes>>doc:Glossary.Attribute.WebHome]] defined by an [[MSD>>doc:Glossary.Metadata structure definition.WebHome]] can be organised into a hierarchical structure as illustrated in Figure 3 above. For this reason, metadata [[attributes>>doc:Glossary.Attribute.WebHome]] appear in data messages structured in the same way as metadata messages.
269	269
270		-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.
	255	+The [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] example below is an excerpt from a structure specific data message illustrating reporting of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] with a hierarchical structure at the observation level.
271	271
272	272	For completeness, the excerpt also shows:
273	273
274		-* OBS_STATUS – a simple observation-level data attribute
275		-* TITLE – a multi-lingual data attribute
276		-* SOURCE_AGENCY – a multi-value data attribute
	259	+* OBS_STATUS – a simple observation-level data [[attribute>>doc:Glossary.Attribute.WebHome]]
	260	+* TITLE – a multi-lingual data [[attribute>>doc:Glossary.Attribute.WebHome]]
	261	+* SOURCE_AGENCY – a multi-value data [[attribute>>doc:Glossary.Attribute.WebHome]]
277	277
278		-<Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
	263	+> <Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
	264	+> <!—- complex multi-value and multi-lingual data attributes ~-~->
	265	+> <Comp id="TITLE" xsi:type="ns1:TITLE_ATTRIBUTE">
	266	+> <Value>
	267	+> <common:Text xml:lang="en">Some English Text</common:Text>
	268	+> <common:Text xml:lang="fr">Quelques textes en anglais</common:Text>
	269	+> </Value>
	270	+> </Comp>
	271	+> <Comp id="SOURCE_AGENCY" xsi:type="ns1:SOURCE_AGENCY_ATTRIBUTE">
	272	+> <Value>4F0</Value>
	273	+> <Value>4D0</Value>
	274	+> <Value>CZ2</Value>
	275	+> </Comp>
	276	+> <!—- metadata attributes are reported like in metadata messages ~-~->
	277	+> <Metadata>
	278	+> <Attribute id="COLLECTION">
	279	+> <Attribute id="METHOD">
	280	+> <Text lang="en">AAA</Text>
	281	+> </Attribute>
	282	+> </Attribute>
	283	+> <Attribute id="CONTACT">
	284	+> <Value>CONTACT 1</Value>
	285	+> <Attribute id="NAME">
	286	+> <Value>Contact 1 Name 1</Value>
	287	+> </Attribute>
	288	+> <Attribute id="NAME">
	289	+> <Value>Contact 1 Name 2</Value>
	290	+> </Attribute>
	291	+> </Attribute>
	292	+> <Attribute id="CONTACT">
	293	+> <Value>CONTACT 2</Value>
	294	+> <Attribute id="NAME">
	295	+> <Value>Contact 2 Name 1</Value>
	296	+> </Attribute>
	297	+> <Attribute id="NAME">
	298	+> <Value>Contact 2 Name 2</Value>
	299	+> </Attribute>
	300	+> </Attribute>
	301	+> </Metadata>
	302	+> </Obs>
279	279
280		-<!—- complex multi-value and multi-lingual data attributes ~-~->
	304	+(% class="wikigeneratedid" id="HNew-MetadataProvisionAgreement" %)
	305	+**New - Metadata Provision Agreement**
281	281
282		-<Comp id="TITLE" xsi:type="ns1:TITLE_ATTRIBUTE">
	307	+(% class="wikigeneratedid" id="HNew-MetadataProvisionAgreement" %)
	308	+In version 2.1 a [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] could be used to report information against a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] or [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]. From version 3.0 this is managed by two separate structures, the Data [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]] and the Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]].
283	283
284		-<Value>
	310	+(% class="wikigeneratedid" id="HMovetargettoMetadataflowandMetadataProvisionAgreement" %)
	311	+**Move target to Metadataflow and Metadata Provision Agreement**
	312	+For [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] that is reported against structures, the allowable targets information which is used to specify what structures the [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] can be reported against, has moved to the [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and can be further refined in the Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]].
285	285
286		-<common:Text xml:lang="en">Some English Text</common:Text>
	314	+(% class="wikigeneratedid" id="HAddmaintainablepropertiestoreferencemetadata" %)
	315	+**Add maintainable properties to reference metadata**
	316	+A Metadataset now has mandatory identification information, (owner id, id, [[version>>doc:Glossary.Version.WebHome]]) enabling metadata providers to uniquely identify their reports for create, update or delete maintenance operations.
287	287
288		-<common:Text xml:lang="fr">Quelques textes en anglais</common:Text>
	318	+== 3.5 Microdata Exchange ==
289	289
290		-</Value>
	320	+Several changes have been made the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]] to support microdata use cases in addition to aggregated time series.
291	291
292		-</Comp>
	322	+(% class="wikigeneratedid" id="HMultiplemeasures" %)
	323	+**Multiple [[measures>>doc:sdmx:Glossary.Measure.WebHome]]** [[measures>>doc:sdmx: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:sdmx:Glossary.Measure.WebHome]]. [[Measures>>doc:sdmx:Glossary.Measure.WebHome]] now act like any other [[component>>doc:sdmx:Glossary.Component.WebHome]] in that they use (% style="color:#e74c3c" %)[[concepts>>doc:sdmx:Glossary.Concept.WebHome]](%%), can have their own local coded or uncoded [[representation>>doc:sdmx:Glossary.Representation.WebHome]] defined within the [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]], and can be either mandatory or conditional. Creating a [[measure>>doc:sdmx:Glossary.Measure.WebHome]] with the “[[MEASURE>>doc:sdmx:Glossary.Measure.WebHome]]” (% style="color:#e74c3c" %)[[concept>>doc:sdmx:Glossary.Concept.WebHome]](%%) role applied emulates the (% style="color: rgb(231, 76, 60); color: rgb(231, 76, 60)" %)version(%%) 2.1 MeasureDimension behaviour as illustrated in the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] example below:
293	293
294		-<Comp id="SOURCE_AGENCY" xsi:type="ns1:SOURCE_AGENCY_ATTRIBUTE">
	325	+> <str:MeasureList id=”MeasureDescriptor”>
	326	+> <str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
	327	+> <Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
	328	+> </str:ConceptIdentity>
	329	+> <str:LocalRepresentation>
	330	+> <str:TextFormat textType=”String” isMultiLingual=”true” />
	331	+> </str:LocalRepresentation>
	332	+> <str:ConceptRole>
	333	+> <Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
	334	+> </str:ConceptRole>
	335	+> </str:Measure>
	336	+> ...
	337	+> <str:Measure>
	338	+> </str:MeasureList>
295	295
296		-<Value>4F0</Value>
	340	+(% class="wikigeneratedid" id="HMulti-valuemeasuresandattributes" %)
	341	+**Multi-value measures and attributes**
	342	+Both [[measures>>doc:Glossary.Measure.WebHome]] and [[attributes>>doc: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:Glossary.Measure.WebHome]] or [[attribute>>doc:Glossary.Attribute.WebHome]] is //mandatory// or optional. In the [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] [[measure>>doc: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.
297	297
298		-<Value>4D0</Value>
	344	+(% class="wikigeneratedid" id="HAttributesrelationshiptomeasures" %)
	345	+**Attributes relationship to measures**
	346	+In addition to attaching [[attributes>>doc:Glossary.Attribute.WebHome]] to a specific level within the [[dataset>>doc:Glossary.Data set.WebHome]], their relationship 202 to [[measures>>doc:Glossary.Measure.WebHome]] can also be defined.
299	299
300		-<Value>CZ2</Value>
	348	+(% class="wikigeneratedid" id="HValuelists" %)
	349	+**Value lists**
	350	+Value lists help in modelling microdata by providing an enumeration similar to [[code lists>>doc:Glossary.Code list.WebHome]] 206 but allowing any string values without being restricted to the rules of [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] identifiers. That allows ValueItems (the equivalent to [[Code>>doc:Glossary.Code.WebHome]]) to contain symbols like ‘¥’ and ‘€’, but also means they are not identifiable.
301	301
302		-</Comp>
	352	+== 3.6 Geospatial Data Exchange ==
303	303
304		-<!—- metadata attributes are reported like in metadata messages ~-~->
305		-
306		-<Metadata>
307		-
308		-<Attribute id="COLLECTION">
309		-
310		-<Attribute id="METHOD">
311		-
312		-<Text lang="en">AAA</Text>
313		-
314		-</Attribute>
315		-
316		-</Attribute>
317		-
318		-<Attribute id="CONTACT">
319		-
320		-<Value>CONTACT 1</Value>
321		-
322		-<Attribute id="NAME">
323		-
324		-<Value>Contact 1 Name 1</Value>
325		-
326		-</Attribute>
327		-
328		-<Attribute id="NAME">
329		-
330		-<Value>Contact 1 Name 2</Value>
331		-
332		-</Attribute>
333		-
334		-</Attribute>
335		-
336		-<Attribute id="CONTACT">
337		-
338		-<Value>CONTACT 2</Value>
339		-
340		-<Attribute id="NAME">
341		-
342		-<Value>Contact 2 Name 1</Value>
343		-
344		-</Attribute>
345		-
346		-<Attribute id="NAME">
347		-
348		-<Value>Contact 2 Name 2</Value>
349		-
350		-</Attribute>
351		-
352		-</Attribute>
353		-
354		-</Metadata>
355		-
356		-</Obs>
357		-
358		-=== New - Metadata Provision Agreement ===
359		-
360		-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.
361		-
362		-=== Move target to Metadataflow and Metadata Provision Agreement ===
363		-
364		-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.
365		-
366		-=== Add maintainable properties to reference metadata ===
367		-
368		-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.
369		-
370		-== //3.5 Microdata Exchange// ==
371		-
372		-Several changes have been made the Data Structure Definition to support microdata use cases in addition to aggregated time series.
373		-
374		-=== Multiple measures ===
375		-
376		-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
377		-
378		-Data Structure Definition, and can be either mandatory or conditional. Creating a measure with the “MEASURE” concept role applied emulates the version 2.1
379		-
380		-MeasureDimension behaviour as illustrated in the SDMX-ML example below:
381		-
382		-<str:MeasureList id=”MeasureDescriptor”>
383		-
384		-<str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
385		-
386		-<Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
387		-
388		-</str:ConceptIdentity>
389		-
390		-<str:LocalRepresentation>
391		-
392		-<str:TextFormat textType=”String” isMultiLingual=”true” />
393		-
394		-</str:LocalRepresentation>
395		-
396		-<str:ConceptRole>
397		-
398		-<Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
399		-
400		-</str:ConceptRole>
401		-
402		-</str:Measure>
403		-
404		-...
405		-
406		-<str:Measure>
407		-
408		-</str:MeasureList>
409		-
410		-=== Multi-value measures and attributes ===
411		-
412		-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
413		-
414		-//mandatory// or optional. In the SDMX-ML measure example above, the properties
415		-
416		-//minOccurs=”1” maxOccurs=”1” usage=”mandatory”// specify that OBS_VALUE must be 198 reported, and can only consist of a single value.
417		-
418		-=== Attributes relationship to measures ===
419		-
420		-In addition to attaching attributes to a specific level within the dataset, their relationship 202 to measures can also be defined.
421		-
422		-=== Value lists ===
423		-
424		-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.
425		-
426		-That allows ValueItems (the equivalent to Code) to contain symbols like ‘¥’ and ‘€’, but 208 also means they are not identifiable.
427		-
428		-== //3.6 Geospatial Data Exchange// ==
429		-
430	430	The version 3.0 model has been extended to provide explicit support for geospatial data.
431	431
432		-=== GeospatialInformation type ===
	356	+(% class="wikigeneratedid" id="HGeospatialInformationtype" %)
	357	+**GeospatialInformation type**
	358	+A new GeospatialInformation string type has been added which can be used as the [[representation>>doc:Glossary.Representation.WebHome]] for any [[dimension>>doc:Glossary.Dimension.WebHome]], [[attribute>>doc:Glossary.Attribute.WebHome]] or measure [[component>>doc: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” concept role.
433	433
434		-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.
	360	+(% class="wikigeneratedid" id="HGeospatialcodelists" %)
	361	+**Geospatial code lists**
435	435
436		-=== Geospatial code lists ===
	363	+(% class="wikigeneratedid" id="HGeospatialcodelists" %)
	364	+Two new specialised types of [[code list>>doc:Glossary.Code list.WebHome]] have been added where the definition of each [[code>>doc:Glossary.Code.WebHome]] includes additional geospatial information in addition to the standard ID, name and description:
437	437
438		-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:
439		-
440	440	* 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.
441		-* 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.
	367	+* GeoGridCodelist – A [[code list>>doc: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.
442	442
443		-=== //3.7 Structure Mapping// ===
	369	+== 3.7 Structure Mapping ==
444	444
445		-The Structure Set in version 2.1 is a container for many mapping structures including Data Structure Map, Codelist Map and Concept Map. For version 3.0 the Structure Set artefact has been deprecated and replaced with a number of new maintainables giving better flexibility and reusability, specifically: Structure Map, Concept Scheme Map, Representation Map, Reporting Taxonomy Map, Category Scheme Map and Organisation Scheme Map.
	371	+The [[Structure Set>>doc:Glossary.Structure set.WebHome]] in version 2.1 is a container for many mapping structures including Data Structure Map, Codelist Map and Concept Map. For version 3.0 the [[Structure Set>>doc:Glossary.Structure set.WebHome]] [[artefact>>doc:Glossary.Artefact.WebHome]] has been deprecated and replaced with a number of new maintainables giving better flexibility and reusability, specifically: Structure Map, [[Concept Scheme>>doc:Glossary.Concept scheme.WebHome]] Map, [[Representation>>doc:Glossary.Representation.WebHome]] Map, [[Reporting Taxonomy>>doc:Glossary.Reporting taxonomy.WebHome]] Map, [[Category Scheme>>doc:Glossary.Category scheme.WebHome]] Map and Organisation Scheme Map.
446	446
447		-The version 2.1 Codelist Map been replaced with Representation Map which allows mappings to be defined between any combination of Code Lists, Value Lists and noncoded representations such as text strings and numbers.
	373	+The version 2.1 Codelist Map been replaced with [[Representation>>doc:Glossary.Representation.WebHome]] Map which allows mappings to be defined between any combination of [[Code Lists>>doc:Glossary.Code list.WebHome]], Value Lists and noncoded [[representations>>doc:Glossary.Representation.WebHome]] such as text strings and numbers.
448	448
449		-==== Many-to-many source and target components ====
	375	+(% class="wikigeneratedid" id="HMany-to-manysourceandtargetcomponents" %)
	376	+**Many-to-many source and target components**
	377	+Structure mapping rules may be defined with both multiple source [[components>>doc:Glossary.Component.WebHome]] and multiple target [[components>>doc:Glossary.Component.WebHome]] in contrast to version 2.1 where only one source and target was allowed. That supports many-to-many (n-n) mapping use cases where the output of a mapping rule may be dependent on the combination of a number of input [[components>>doc:Glossary.Component.WebHome]]. For instance:
450	450
451		-Structure mapping rules may be defined with both multiple source components and multiple target components in contrast to version 2.1 where only one source and target was allowed. That supports many-to-many (n-n) mapping use cases where the output of a mapping rule may be dependent on the combination of a number of input components. For instance:
	379	+Set the output [[component>>doc:Glossary.Component.WebHome]] INDICATOR=”DE_A” if the input [[components>>doc:Glossary.Component.WebHome]] are FREQ=”A” and REF_AREA=”DE”.
452	452
453		-Set the output component INDICATOR=”DE_A” if the input components are FREQ=”A” and REF_AREA=”DE”.
	381	+Similarly, an n-n rule may also set the values of any number of output [[components>>doc:Glossary.Component.WebHome]]:
454	454
455		-Similarly, an n-n rule may also set the values of any number of output components:
	383	+Set the output [[components>>doc:Glossary.Component.WebHome]] FREQ=”A”, REF_AREA=”DE” if the input [[component>>doc:Glossary.Component.WebHome]] INDICATOR=”DE_A”.
456	456
457		-Set the output components FREQ=”A”, REF_AREA=”DE” if the input component INDICATOR=”DE_A”.
458		-
459	459	**Fixed source and target**
	386	+The Structure Map may now define input or output [[components>>doc:Glossary.Component.WebHome]] which have a fixed value.
460	460
461		-The Structure Map may now define input or output components which have a fixed value.
	388	+(% class="wikigeneratedid" id="HTimerepresentationsmapping" %)
	389	+**Time representations mapping**
	390	+Non [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] time [[representations>>doc:Glossary.Representation.WebHome]] may now be described in a Structure Map, allowing them to be mapped into [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] [[time formats>>doc:Glossary.Time format.WebHome]].
462	462
463		-==== Time representations mapping ====
	392	+(% class="wikigeneratedid" id="HRegularexpressionandsubstringmappings" %)
	393	+**Regular expression and substring mappings**
	394	+All item maps allow the use of regular expressions and substrings to match source values, specifically: [[Concept Scheme>>doc:Glossary.Concept scheme.WebHome]] Map, [[Reporting Taxonomy>>doc:Glossary.Reporting taxonomy.WebHome]] Map, [[Category Scheme>>doc:Glossary.Category scheme.WebHome]] Map and Organisation Scheme Map.
464	464
465		-Non SDMX time representations may now be described in a Structure Map, allowing them to be mapped into SDMX time formats.
466		-
467		-==== Regular expression and substring mappings ====
468		-
469		-All item maps allow the use of regular expressions and substrings to match source values, specifically: Concept Scheme Map, Reporting Taxonomy Map, Category Scheme Map and Organisation Scheme Map.
470		-
471		-==== Item maps validity period ====
472		-
	396	+(% class="wikigeneratedid" id="HItemmapsvalidityperiod" %)
	397	+**Item maps validity period**
473	473	Item maps may further define the period for which the mapping is valid, meaning the mapping rule will only be applied if the row of information being mapped is within the period.
474	474
475		-=== //3.8 Constraints// ===
	400	+== 3.8 Constraints ==
476	476
477		-Constraints in version 3.0 are modelled using two separate artefacts which replace the version 2.1 content constraint:
	402	+[[Constraints>>doc:Glossary.Constraint.WebHome]] in version 3.0 are modelled using two separate [[artefacts>>doc:Glossary.Artefact.WebHome]] which replace the version 2.1 content [[сonstraint>>doc:Glossary.Constraint.WebHome]]:
478	478
479		-* data constraint for data; and
480		-* metadata constraint for reference metadata.
	404	+* data [[сonstraint>>doc:Glossary.Constraint.WebHome]] for data; and
	405	+* metadata [[сonstraint>>doc:Glossary.Constraint.WebHome]] for [[reference metadata>>doc:Glossary.Reference metadata.WebHome]].
481	481
482		-Metadata constraint differs from its data counterpart in having a simplified cube region model better suited to reference metadata reporting use cases and not carrying details of the constrained targets – that information instead being defined directly within the metadataflow and Metadata Provision Agreement. Thus, metadata related constraints only specify constraints to the values of metadata attributes.
	407	+Metadata [[сonstraint>>doc:Glossary.Constraint.WebHome]] differs from its data counterpart in having a simplified cube region model better suited to [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] reporting use cases and not carrying details of the constrained targets – that information instead being defined directly within the [[metadataflow>>doc:Glossary.Metadataflow.WebHome]] and Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]]. Thus, metadata related (% style="color:#e74c3c" %)constraints(%%) only specify [[сonstraints>>doc:Glossary.Constraint.WebHome]] to the values of metadata attributes.
483	483
484		-The ‘%’ wildcard character can now be used when defining cube region constraints to match multiple codes with a single expression, for instance for economic activity, ISIC4_% matches all codes beginning with ‘ISIC4_’ avoiding the need to maintain an explicit list.
	409	+The ‘%’ wildcard character can now be used when defining cube region [[сonstraints>>doc:Glossary.Constraint.WebHome]] to match multiple [[codes>>doc:Glossary.Code.WebHome]] with a single expression, for instance for [[economic activity>>doc:Glossary.Economic activity.WebHome]], ISIC4_% matches all [[codes>>doc:Glossary.Code.WebHome]] beginning with ‘ISIC4_’ avoiding the need to maintain an explicit list.
485	485
486		-The validity period definition has been moved from the constraint to the individual constraining terms, specifically CubeRegion, DataKeySet and MetadataTargetRegion providing more granular control.
	411	+The validity period definition has been moved from the [[сonstraint>>doc:Glossary.Constraint.WebHome]] to the individual constraining terms, specifically CubeRegion, DataKeySet and MetadataTargetRegion providing more granular control.
487	487
488		-Attachment constraints have been deprecated due to a lack of use cases.
	413	+Attachment [[сonstraints>>doc:Glossary.Constraint.WebHome]] have been deprecated due to a lack of use cases.
489	489
490		-=== //3.9 Code List Extension// ===
	415	+== 3.9 Code List Extension ==
491	491
492		-In addition to the two new specialised geospatial forms, the option has been added to define a code list as an extension of, or by inheriting codes from, other lists. An optional prefix can be added to inherited codes to disambiguate duplicates.
	417	+In addition to the two new specialised geospatial forms, the option has been added to define a [[code list>>doc:Glossary.Code list.WebHome]] as an extension of, or by inheriting [[codes>>doc:Glossary.Code.WebHome]] from, other lists. An optional prefix can be added to inherited [[codes>>doc:Glossary.Code.WebHome]] to disambiguate duplicates.
493	493
494		-This feature allows new code lists to be easily derived from existing lists without the need to make and manually maintain copies. When querying for extended code list structures using the REST API, the option has been added to retrieve either the definition or the materialised list. Traditional literal lists of codes continue to be supported.
	419	+This feature allows new [[code lists>>doc:Glossary.Code list.WebHome]] to be easily derived from existing lists without the need to make and manually maintain copies. When querying for extended [[code list>>doc:Glossary.Code list.WebHome]] structures using the REST API, the option has been added to retrieve either the definition or the materialised list. Traditional literal lists of [[codes>>doc:Glossary.Code.WebHome]] continue to be supported.
495	495
496		-=== //3.10 Discriminated Union of Code Lists// ===
	421	+== 3.10 Discriminated Union of Code Lists ==
497	497
498		-Combining code list extension with wildcarded constraints solves the discriminated union of code lists problem where a classification or breakdown has multiple “variants” which are all valid but mutually exclusive. A common example is economic activity where several alternative classification schemes are in use including ISIC revisions 1 to 4 and NACE as used in the European Community.
	423	+Combining [[code list>>doc:Glossary.Code list.WebHome]] extension with wildcarded [[сonstraints>>doc:Glossary.Constraint.WebHome]] solves the discriminated union of [[code lists>>doc:Glossary.Code list.WebHome]] problem where a classification or breakdown has multiple “variants” which are all valid but mutually exclusive. A common example is [[economic activity>>doc:Glossary.Economic activity.WebHome]] where several alternative classification schemes are in use including ISIC revisions 1 to 4 and NACE as used in the European Community.
499	499
500		-=== //3.11 Code Hierarchies// ===
	425	+== 3.11 Code Hierarchies ==
501	501
502		-Code hierarchies allow the definition of complex hierarchies of codes from potentially multiple lists for data discovery purposes. Hierarchical Codelist has been deprecated and replaced by two new artefacts: Hierarchy – the actual hierarchy of codes, and Hierarchy Association links hierarchies directly to any other identifiable object, a capability missing 312 from the version 2.1 model. Further, the linkage can be within a particular context, for instance linking a hierarchy to a dimension within the context of a specific Dataflow (dimension REF_AREA in the context of the ECB:EXR Dataflow).
	427	+[[Code>>doc:Glossary.Code.WebHome]] [[hierarchies>>doc:Glossary.Hierarchy.WebHome]] allow the definition of complex [[hierarchies>>doc:Glossary.Hierarchy.WebHome]] of [[codes>>doc:Glossary.Code.WebHome]] from potentially multiple lists for data discovery purposes. Hierarchical Codelist has been deprecated and replaced by two new [[artefacts>>doc:Glossary.Artefact.WebHome]]: [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] – the actual [[hierarchy>>doc:Glossary.Hierarchy.WebHome]] of [[codes>>doc:Glossary.Code.WebHome]], and [[Hierarchy>>doc:Glossary.Hierarchy.WebHome]] Association links [[hierarchies>>doc:Glossary.Hierarchy.WebHome]] directly to any other identifiable object, a capability missing from the version 2.1 model. Further, the linkage can be within a particular context, for instance linking a [[hierarchy>>doc:Glossary.Hierarchy.WebHome]] to a [[dimension>>doc:Glossary.Dimension.WebHome]] within the context of a specific [[Dataflow>>doc:Glossary.Dataflow.WebHome]] ([[dimension>>doc:Glossary.Dimension.WebHome]] REF_AREA in the context of the ECB:EXR [[Dataflow>>doc:Glossary.Dataflow.WebHome]]).
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__>>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.
	431	+Version 3.0 adopts semantic versioning principles for versioning of metadata [[artefacts>>doc:Glossary.Artefact.WebHome]] 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>>doc:Glossary.Artefact.WebHome]] 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
...	...	@@ -518,34 +518,32 @@
518	518	Examples:
519	519
520	520	SDMX:CL_AREA(1.0.0)
521		-
522	522	SDMX:CL_AREA(2.3.2)
523	523
524		-== Dependency management ==
	448	+(% class="wikigeneratedid" id="HDependencymanagement" %)
	449	+**Dependency management**
525	525
526	526	Additional constructs are possible for dependency management when referencing structures. For instance:
527	527
528		-2.3+.1 Means the currently latest available version >= “2.3.1” and < “3.0.0” (all backwards compatible versions >= “2.3.1”).
	453	+2.3+.1  Means the currently latest available version >= “2.3.1” and < “3.0.0” (all backwards compatible versions >= “2.3.1”).
	454	+2+.3.1  Means the currently latest available version >= “2.3.1” (even if not backwards compatible).
529	529
530		-2+.3.1 Means the currently latest available version >= “2.3.1” (even if not backwards compatible).
	456	+(% class="wikigeneratedid" id="HDraftstructures" %)
	457	+**Draft structures**
531	531
532		-== Draft structures ==
533		-
534	534	A key principle is that semantically versioned structures are immutable and must not be changed without a corresponding change to the version number, except where explicitly marked as draft using extensions to the version number.
535	535
536	536	MAJOR.MINOR.PATCH-EXTENSION
537	537
538		-1.10.0-draft Means that version 1.10.0 is still being modified and may change – equivalent to setting isFinal=false in SDMX 2.1.
	463	+1.10.0-draft  Means that version 1.10.0 is still being modified and may change – equivalent to setting isFinal=false in [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 2.1.
	464	+1.10.0-unstable  Alternative to -draft.
	465	+1.10.0-notfinal  Alternative to -draft.
539	539
540		-1.10.0-unstable Alternative to -draft.
	467	+The [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 isFinal property is deprecated in 3.0.
541	541
542		-1.10.0-notfinal Alternative to -draft.
543		-
544		-The SDMX 2.1 isFinal property is deprecated in 3.0.
545		-
546	546	= 5 REST Web Services API =
547	547
548		-== //5.1 Simplified list of resources// ==
	471	+== 5.1 Simplified list of resources ==
549	549
550	550	The version 3.0 REST API has just five main resources:
551	551
...	...	@@ -559,47 +559,51 @@
559	559
560	560	This and changes in the URLs and query parameters on the data, availability and metadata resources means that, with the exception of schema queries, the version 3.0 API is not backwardly compatible.
561	561
562		-== //5.2 Improved data queries// ==
	485	+== 5.2 Improved data queries ==
563	563
564		-Data queries have been changed to provide more granular selections from contexts wider than just a Dataflow.
	487	+Data queries have been changed to provide more granular selections from contexts wider than just a [[Dataflow>>doc:Glossary.Dataflow.WebHome]].
565	565
566		-=== Extend the context of data retrieval ===
	489	+(% class="wikigeneratedid" id="HExtendthecontextofdataretrieval" %)
	490	+**Extend the context of data retrieval**
	491	+Version 2.1 data queries always retrieved data from a single specific [[Dataflow>>doc:Glossary.Dataflow.WebHome]]. In version 3.0, the query context may be specified as:
567	567
568		-Version 2.1 data queries always retrieved data from a single specific Dataflow. In version 3.0, the query context may be specified as:
	493	+* [[Dataflow>>doc:Glossary.Dataflow.WebHome]];
	494	+* Data Structure Definition – i.e., all [[Dataflows>>doc:Glossary.Dataflow.WebHome]] that use it; or
	495	+* Provision Agreement – i.e., all [[Dataflows>>doc:Glossary.Dataflow.WebHome]] associated with it.
569	569
570		-* Dataflow;
571		-* Data Structure Definition – i.e., all Dataflows that use it; or
572		-* Provision Agreement – i.e., all Dataflows associated with it.
	497	+Data queries may also search across [[datasets>>doc:Glossary.Data set.WebHome]], for instance “retrieve all data about a country”.
573	573
574		-Data queries may also search across datasets, for instance “retrieve all data about a country”.
	499	+(% class="wikigeneratedid" id="HComponent-basedfilters" %)
	500	+**Component-based filters**
	501	+Expressions filtering on individual [[components>>doc:Glossary.Component.WebHome]] can now be included as part of the data query URL.
575	575
576		-=== Component-based filters ===
577		-
578		-Expressions filtering on individual components can now be included as part of the data query URL.
579		-
580	580	/data/dataflow/ESTAT/ICP?c[REF_AREA]=CH&c[CONF_STATUS]=F
581	581
582		-=== Support for operators ===
583		-
	505	+(% class="wikigeneratedid" id="HSupportforoperators" %)
	506	+**Support for operators**
584	584	Filter expressions can also include operators.
585	585
586		-/data/dataflow/ESTAT/ICP?c[REF_AREA]=DE&c[ICP_ITEM]=sw:01&c[TIME_PERIOD]=ge:2015 Operators include:
	509	+/data/dataflow/ESTAT/ICP?c[REF_AREA]=DE&c[ICP_ITEM]=sw:01&c[TIME_PERIOD]=ge:2015
587	587
588		-|eq|Equals
589		-|ne|Not equal to
590		-|le|Less than
591		-|ge|Greater than or equal to
592		-|sw|Starts with
	511	+Operators include:
593	593
594		-=== Support for multiple keys ===
	513	+(% style="width:531.039px" %)
	514	+|(% style="width:151px" %)eq|(% style="width:378px" %)Equals
	515	+|(% style="width:151px" %)ne|(% style="width:378px" %)Not equal to
	516	+|(% style="width:151px" %)le|(% style="width:378px" %)Less than
	517	+|(% style="width:151px" %)ge|(% style="width:378px" %)Greater than or equal to
	518	+|(% style="width:151px" %)sw|(% style="width:378px" %)Starts with
595	595
596		-Queries can now specify multiple series keys.
	520	+(% class="wikigeneratedid" id="HSupportformultiplekeys" %)
	521	+**Support for multiple keys**
	522	+Queries can now specify multiple [[series keys>>doc:Glossary.Series key.WebHome]].
597	597
	524	+(% class="wikigeneratedid" %)
598	598	/data/dataflow/ESTAT/ICP/1.0.0/M…A.ANR,M…A.INX,M…B.CTG
599	599
600		-== //5.3 Improved reference metadata queries// ==
	527	+== 5.3 Improved reference metadata queries ==
601	601
602		-Reference metadata queries have been improved with a number of new options to retrieve metadata reports.
	529	+[[Reference metadata>>doc:Glossary.Reference metadata.WebHome]] queries have been improved with a number of new options to retrieve metadata reports.
603	603
604	604	**Get metadata reports by ID**
605	605
...	...	@@ -613,138 +613,143 @@
613	613
614	614	/metadata/structure/datastructure/BIS/BIS_CBS/1.0
615	615
616		-== //5.4 Structural metadata maintenance// ==
	543	+== 5.4 Structural metadata maintenance ==
617	617
618		-Support has been added for maintenance of structural metadata.
	545	+Support has been added for maintenance of [[structural metadata>>doc:Glossary.Structural metadata.WebHome]].
619	619
620		-HTTP verbs PUT, POST and DELETE may be used to submit SDMX-ML or SDMX-JSON structure messages to an SDMX registry for the purposes of adding, updating or deleting structural metadata artefacts.
	547	+HTTP verbs PUT, POST and DELETE may be used to submit [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] or [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] structure messages to an [[SDMX registry>>doc:Glossary.SDMX Registry.WebHome]] for the purposes of adding, updating or deleting [[structural metadata>>doc:Glossary.Structural metadata.WebHome]] [[artefacts>>doc:Glossary.Artefact.WebHome]].
621	621
622	622	= 6 XML, JSON, CSV and EDI Transmission formats =
623	623
624		-== //6.1 SDMX-ML// ==
	551	+== 6.1 SDMX-ML ==
625	625
626		-The SDMX-ML XML messages have been modified and updated for version 3.0. While they broadly follow the same principles, there have been significant changes which break backward compatibility.
	553	+The [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] XML messages have been modified and updated for version 3.0. While they broadly follow the same principles, there have been significant changes which break backward compatibility.
627	627
628		-=== Structure message ===
	555	+(% class="wikigeneratedid" id="HStructuremessage" %)
	556	+**Structure message**
	557	+The [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] structure message is used for transmission of [[structural metadata>>doc:Glossary.Structural metadata.WebHome]]. It closely reflects the [[SDMX information model>>doc:Glossary.SDMX Information Model.WebHome]] and has therefore been significantly updated for version 3.0 with the addition of new structures, modifications where structures have changed, and removal of deprecated structures like Structure Set.
629	629
630		-The SDMX-ML structure message is used for transmission of structural metadata. It closely reflects the SDMX information model and has therefore been significantly updated for version 3.0 with the addition of new structures, modifications where structures have changed, and removal of deprecated structures like Structure Set.
	559	+Additionally, the way the individual [[artefacts>>doc:Glossary.Artefact.WebHome]] are organised into ‘collections’ within the message has been significantly revised with a simpler flat structure adopted as set out in the following table:
631	631
632		-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:
	561	+(% style="width:1102.04px" %)
	562	+|(% style="width:321px" %)**Artefact type**|(% style="width:351px" %)**Version 2.1 Collection**|(% style="width:426px" %)**Version 3.0 Collection**
	563	+|(% style="width:321px" %)AgencyScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)AgencySchemes
	564	+|(% style="width:321px" %)DataConsumerScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataConsumerSchemes
	565	+|(% style="width:321px" %)DataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataProviderSchemes
	566	+|(% style="width:321px" %)MetadataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)MetadataProviderSchemes
	567	+|(% style="width:321px" %)OrganisationUnitScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)OrganisationUnitSchemes
	568	+|(% style="width:321px" %)GeographicCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeographicCodelists
	569	+|(% style="width:321px" %)GeoGridCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeoGridCodelists
	570	+|(% style="width:321px" %)ConceptScheme|(% style="width:351px" %)Concepts|(% style="width:426px" %)ConceptSchemes
	571	+|(% style="width:321px" %)ValueList|(% style="width:351px" %)Codelists|(% style="width:426px" %)ValueLists
	572	+|(% style="width:321px" %)StructureMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)StructureMaps
	573	+|(% style="width:321px" %)RepresentationMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)RepresentationMaps
	574	+|(% style="width:321px" %)ConceptSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ConceptSchemeMaps
	575	+|(% style="width:321px" %)CategorySchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)CategorySchemeMaps
	576	+|(% style="width:321px" %)OrganisationSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)OrganisationSchemeMaps
	577	+|(% style="width:321px" %)ReportingTaxonomyMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ReportingTaxonomyMaps
	578	+|(% style="width:321px" %)DataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)DataConstraints
	579	+|(% style="width:321px" %)MetadataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)MetadataConstraints
	580	+|(% style="width:321px" %)MetadataProvisionAgreement|(% style="width:351px" %)ProvisionAgreement|(% style="width:426px" %)MetadataProvisionAgreements
	581	+|(% style="width:321px" %)CustomTypeScheme|(% style="width:351px" %)CustomTypes|(% style="width:426px" %)CustomTypeSchemes
	582	+|(% style="width:321px" %)VtlMappingScheme|(% style="width:351px" %)VtlMappings|(% style="width:426px" %)VtlMappingSchemes
	583	+|(% style="width:321px" %)NamePersonalisationScheme|(% style="width:351px" %)NamePersonalisations|(% style="width:426px" %)NamePersonalisationSchemes
	584	+|(% style="width:321px" %)RulesetScheme|(% style="width:351px" %)Rulesets|(% style="width:426px" %)RulesetSchemes
	585	+|(% style="width:321px" %)TransformationScheme|(% style="width:351px" %)Transformations|(% style="width:426px" %)TransformationSchemes
	586	+|(% style="width:321px" %)UserDefinedOperatorScheme|(% style="width:351px" %)UserDefinedOperators|(% style="width:426px" %)UserDefinedOperatorSchemes
633	633
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
	588	+No changes have been made to the way the following [[artefacts>>doc:Glossary.Artefact.WebHome]] are organised in the structure message:
659	659
660		-No changes have been made to the way the following artefacts are organised in the structure message:
	590	+(% style="width:1106.04px" %)
	591	+|(% style="width:326px" %)**Artefact type**|(% style="width:776px" %)**Collection**
	592	+|(% style="width:326px" %)Dataflow|(% style="width:776px" %)Dataflows
	593	+|(% style="width:326px" %)Metadataflow|(% style="width:776px" %)Metadataflows
	594	+|(% style="width:326px" %)CategoryScheme|(% style="width:776px" %)CategorySchemes
	595	+|(% style="width:326px" %)Categorisation|(% style="width:776px" %)Categorisations
	596	+|(% style="width:326px" %)Codelist|(% style="width:776px" %)Codelists
	597	+|(% style="width:326px" %)Hierarchy|(% style="width:776px" %)Hierarchies
	598	+|(% style="width:326px" %)HierarchyAssociation|(% style="width:776px" %)HierarchyAssociations
	599	+|(% style="width:326px" %)MetadataStructure|(% style="width:776px" %)MetadataStructures
	600	+|(% style="width:326px" %)DataStructure|(% style="width:776px" %)DataStructures
	601	+|(% style="width:326px" %)ReportingTaxonomy|(% style="width:776px" %)ReportingTaxonomies
	602	+|(% style="width:326px" %)Process|(% style="width:776px" %)Processes
	603	+|(% style="width:326px" %)ProvisionAgreement|(% style="width:776px" %)ProvisionAgreements
661	661
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
675		-
676	676	From version 3.0, collections can appear in any order within a structure message.
677	677
678		-=== Data messages ===
	607	+(% class="wikigeneratedid" id="HDatamessages" %)
	608	+**Data messages**
679	679
680		-All legacy SDMX-ML data messages have been deprecated with the exception of Structure Specific Data which becomes the sole standard format for transmission of SDMX data in XML in version 3.0.
	610	+(% class="wikigeneratedid" id="HDatamessages" %)
	611	+All legacy [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] data messages have been deprecated with the exception of Structure Specific Data which becomes the sole standard format for transmission of [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] data in XML in version 3.0.
681	681
682	682	Specifically, the following data messages are not supported in version 3.0:
683	683
684		-* SDMX-ML 1.0/2.0 Generic (time-series) data message
685		-* SDMX-ML 1.0/2.0 Compact (time-series) data message
686		-* SDMX-ML 1.0/2.0 Utility (time-series) data message
687		-* SDMX-ML 1.0/2.0 Cross-Sectional data message
688		-* SDMX-ML 2.1 Generic data messages (for observations, time-series and crosssectional data)
	615	+* [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Generic (time-series) data message
	616	+* [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Compact (time-series) data message
	617	+* [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Utility (time-series) data message
	618	+* [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 1.0/2.0 Cross-Sectional data message
	619	+* [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] 2.1 Generic data messages (for observations, time-series and crosssectional data)
689	689
690		-The Structure Specific Data message has been extended to support the transmission of microdata sets, in particular those with multiple measures and array values for measures and attributes.
	621	+The Structure Specific Data message has been extended to support the transmission of microdata sets, in particular those with multiple [[measures>>doc:Glossary.Measure.WebHome]] and array values for [[measures>>doc:Glossary.Measure.WebHome]] and [[attributes>>doc:Glossary.Attribute.WebHome]].
691	691
692		-As detailed in paragraph 3.4, the message now additionally allows data’s reference metadata to be reported as an integral part of the dataset. Like data attributes, these metadata attributes are included in the data message at the dataset, series or observation level as appropriate.
	623	+As detailed in paragraph 3.4, the message now additionally allows data’s [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] to be reported as an integral part of the [[dataset>>doc:Glossary.Data set.WebHome]]. Like data [[attributes>>doc:Glossary.Attribute.WebHome]], these metadata [[attributes>>doc:Glossary.Attribute.WebHome]] are included in the data message at the [[dataset>>doc:Glossary.Data set.WebHome]], series or observation level as appropriate.
693	693
694	694	The time series variant of the Structure Specific Data message is no longer used.
695	695
696		-=== Reference metadata message ===
	627	+(% class="wikigeneratedid" id="HReferencemetadatamessage" %)
	628	+**Reference metadata message**
	629	+The Generic Metadata message remains the standard format for transmission of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] sets in XML but has been modified to support the revised version 3.0 [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] model.
697	697
698		-The Generic Metadata message remains the standard format for transmission of reference metadata sets in XML but has been modified to support the revised version 3.0 reference metadata model.
	631	+(% class="wikigeneratedid" id="HRegistrystructuralmetadata2018query2019messages" %)
	632	+**Registry structural metadata ‘query’ messages**
	633	+As a consequence of the deprecation of the SOAP API and standardisation on REST, the [[structural metadata>>doc:Glossary.Structural metadata.WebHome]] ‘query’ messages have all been removed. In version 3.0, querying an [[SDMX Registry>>doc:Glossary.SDMX Registry.WebHome]] for [[structural metadata>>doc:Glossary.Structural metadata.WebHome]] is performed solely using REST GET.
699	699
700		-=== Registry structural metadata ‘query’ messages ===
	635	+(% class="wikigeneratedid" id="HStructurereferencing" %)
	636	+**Structure referencing**
	637	+The option to reference structures using Agency, ID and Version has been removed. From [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] version 3.0 URN is used for all referencing purposes with the exception of local references such as where groups reference [[dimensions>>doc:Glossary.Dimension.WebHome]] within a [[DSD>>doc:Glossary.Data structure definition.WebHome]].
701	701
702		-As a consequence of the deprecation of the SOAP API and standardisation on REST, the structural metadata ‘query’ messages have all been removed. In version 3.0, querying an SDMX Registry for structural metadata is performed solely using REST GET.
	639	+== 6.2 SDMX-JSON ==
703	703
704		-=== Structure referencing ===
	641	+Like [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]], the [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] messages have been significantly modified and updated for version 3.0. They are not backwardly compatible with version 2.1.
705	705
706		-The option to reference structures using Agency, ID and Version has been removed. From SDMX version 3.0 URN is used for all referencing purposes with the exception of local references such as where groups reference dimensions within a DSD.
	643	+(% class="wikigeneratedid" id="HStructuremessage-1" %)
	644	+**Structure message**
	645	+The [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] structure message closely replicates the [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] equivalent. Like that of [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] it has been updated to align it with the version 3.0 information model with addition, deletion and modification of [[artefacts>>doc:Glossary.Artefact.WebHome]] as required. The organisation of the structure collections has also been revised as detailed in paragraph 6.1.
707	707
708		-== //6.2 SDMX-JSON// ==
	647	+(% class="wikigeneratedid" id="HDatamessage" %)
	648	+**Data message**
	649	+The [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] data message has similarly be updated. Additional changes have been made to allow a single message to carry data from multiple [[datasets>>doc:Glossary.Data set.WebHome]] with potentially different [[Data Structure Definitions>>doc:Glossary.Data structure definition.WebHome]] to support REST data queries of the form “retrieve all data about a country”. For this reason, the version 3.0 [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] is not backwardly compatible with version 2.1 data messages. Support has been added for the transmission of microdata and reporting of [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] on data as an integral part of the dataset.
709	709
710		-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.
	651	+(% class="wikigeneratedid" id="HReferencemetadatamessage-1" %)
	652	+**Reference metadata message**
	653	+The [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] metadata message has also been updated to support the version 3.0 [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] and Metadataset specifications.
711	711
712		-=== Structure message ===
	655	+(% class="wikigeneratedid" id="HStructurereferencing-1" %)
	656	+**Structure referencing**
	657	+As for [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]], the option to reference structures using Agency, ID and Version has been removed with URN used for all non-local referencing purposes.
713	713
714		-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.
	659	+== 6.3 SDMX-CSV ==
715	715
716		-=== Data message ===
	661	+CSV in [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] is used transmission of data and [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] only.
717	717
718		-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.
	663	+(% class="wikigeneratedid" id="HDatamessage-1" %)
	664	+**Data message**
	665	+The [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]]-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:
719	719
720		-=== Reference metadata message ===
	667	+* An additional column identifying the type if the [[artefact>>doc:Glossary.Artefact.WebHome]] defining the structure of the data: “[[dataflow>>doc:Glossary.Dataflow.WebHome]]”, “datastructure” or “dataprovision”;
	668	+* A column for the structure [[artefact>>doc:Glossary.Artefact.WebHome]]’s identification of the form
721	721
722		-The SDMX-JSON metadata message has also been updated to support the version 3.0 reference metadata and Metadataset specifications.
	670	+ESTAT:NA_MAIN(1.6.0) which replaces the [[dataflow>>doc:Glossary.Dataflow.WebHome]] identifier in version 2.1; and
723	723
724		-=== Structure referencing ===
	672	+* A column for the [[dataset>>doc:Glossary.Data set.WebHome]] action: information, append, replace or delete, which is consistent with both the the [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] data messages.
725	725
726		-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.
	674	+(% class="wikigeneratedid" id="HReferencemetadatamessage-2" %)
	675	+**Reference metadata message**
	676	+The [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]]-CSV metadata message is new for version 3.0 and, like the [[SDMX-ML>>doc:Glossary.SDMX-ML.WebHome]] and [[SDMX-JSON>>doc:Glossary.SDMX-JSON.WebHome]] equivalents, is used for the transmission [[reference metadata>>doc:Glossary.Reference metadata.WebHome]] sets.
727	727
728		-== //6.3 SDMX-CSV// ==
	678	+== 6.4 EDI deprecation ==
729	729
730		-CSV in SDMX is used transmission of data and reference metadata only.
731		-
732		-=== Data message ===
733		-
734		-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:
735		-
736		-* 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
737		-
738		-ESTAT:NA_MAIN(1.6.0) which replaces the dataflow identifier in version 2.1; and
739		-
740		-* 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.
741		-
742		-=== Reference metadata message ===
743		-
744		-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.
745		-
746		-=== //6.4 EDI deprecation// ===
747		-
748	748	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.
749	749
750	750	= Appendix A – Version 2.1 Information Model =

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