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 STANDARDS

Parent

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	1	+Methodology.WebHome

Content

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1		-{{box title="**Contents**"}}{{toc/}}{{/box}}
	1	+{{box title="**Contents**"}}
	2	+{{toc/}}
	3	+{{/box}}
	4	+
2	2	**Revision History**
3	3
4		-|Revision|Date|Contents
5		-|DRAFT 1.0|May 2021|Draft release updated for SDMX 3.0 for public consultation
6		-|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
7	7
8	8	= 1 Overview =
9	9
...	...	@@ -21,7 +21,7 @@
21	21
22	22	**Versioning of Structural Metadata Artefacts**
23	23
24		-• 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 artefacts ([[https:~~/~~/semver.org/>>https://semver.org/||rel="noopener noreferrer" target="_blank"]])
25	25
26	26	**REST Web Services Application Programming Interface (API)**
27	27
...	...	@@ -32,7 +32,7 @@
32	32
33	33	**SOAP Web Services API**
34	34
35		-• 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**;**
36	36
37	37	**XML, JSON, CSV and EDI Transmission formats**
38	38
...	...	@@ -61,9 +61,10 @@
61	61
62	62	Version 3.0 introduces breaking changes into the web services API, transmission formats and information model. A summary is given in the table below.
63	63
64		-== //2.1 Web Services API// ==
	68	+== 2.1 Web Services API ==
65	65
66		-|**REST API**|(((
	70	+(% style="width:948.039px" %)
	71	+|**REST API**|(% style="width:818px" %)(((
67	67	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:
68	68
69	69	* Structure queries
...	...	@@ -79,14 +79,13 @@
79	79
80	80	Implementors are also recommended to version their API services providing users with an explicit choice of which version to use.
81	81	)))
82		-|**SOAP API**|The SOAP API has been deprecated.
	87	+|**SOAP API**|(% style="width:818px" %)The SOAP API has been deprecated.
83	83
84		-== //2.2 Transmission Formats// ==
	89	+== 2.2 Transmission Formats ==
85	85
86		-:
87		-
88	88	(((
89		-|**SDMX-ML**|(((
	92	+(% style="width:952.039px" %)
	93	+|(% style="width:130px" %)**SDMX-ML**|(% style="width:820px" %)(((
90	90	The following legacy XML data messages have been deprecated:
91	91
92	92	SDMX-ML 1.0/2.0 Generic (time-series) data message
...	...	@@ -102,34 +102,27 @@
102	102	The SDMX-ML structure message is not backwardly compatible primarily due to:
103	103
104	104	* Changes to the information model
105		-* Changes to the way the structures are organised into
106		-
107		-‘collections’ within the message
108		-
	109	+* Changes to the way the structures are organised into ‘collections’ within the message
109	109	* Deprecation of the Agency, ID, Version option for referencing of structures in messages
110	110	)))
111		-|**SDMX-JSON**|(((
	112	+|(% style="width:130px" %)**SDMX-JSON**|(% style="width:820px" %)(((
112	112	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.
113	113
114	114	The JSON structure message is not backwardly compatible primarily due to:
115	115
116	116	* Changes to the information model
117		-* Changes to the way the structures are organised into
118		-
119		-‘collections’ within the message
120		-
	118	+* Changes to the way the structures are organised into ‘collections’ within the message
121	121	* Deprecation of the Agency, ID, Version option for referencing of structures in messages
122	122	)))
123		-|**SDMX-EDI**|The EDI format for both structures and data has been deprecated.
124		-|**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.**     **
	121	+|(% style="width:130px" %)**SDMX-EDI**|(% style="width:820px" %)The EDI format for both structures and data has been deprecated.
	122	+|(% style="width:130px" %)**SDMX-CSV**|(% style="width:820px" %)The CSV data and reference metadata messages are not backwardly compatible with those under version 2.1 due to changes to the structure of the messages needed to support new features such as the improved REST API data queries.
125	125	)))
126	126
127		-== //2.3 Information Model// ==
	125	+== 2.3 Information Model ==
128	128
129		-:
130		-
131	131	(((
132		-|**Data Structure Definition**|(((
	128	+(% style="width:955.039px" %)
	129	+|(% style="width:132px" %)**Data Structure Definition**|(% style="width:819px" %)(((
133	133	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.
134	134
135	135	//Conversion guidance for implementors//
...	...	@@ -138,7 +138,7 @@
138	138
139	139	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.
140	140	)))
141		-|**Structure mapping model**|(((
	138	+|(% style="width:132px" %)**Structure mapping model**|(% style="width:819px" %)(((
142	142	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.
143	143
144	144	//Conversion guidance for implementors//
...	...	@@ -147,7 +147,7 @@
147	147
148	148	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.
149	149	)))
150		-|**Reference metadata model**|(((
	147	+|(% style="width:132px" %)**Reference metadata model**|(% style="width:819px" %)(((
151	151	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.
152	152
153	153	Version 2.1 reference metadata models are not valid in version 3.0.
...	...	@@ -154,14 +154,11 @@
154	154
155	155	//Conversion guidance for implementors//
156	156
157		-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
158		-)))
159		-| |(((
160		-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.
	154	+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 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.
161	161
162	162	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.
163	163	)))
164		-|**Constraint model**|(((
	158	+|(% style="width:132px" %)**Constraint model**|(% style="width:819px" %)(((
165	165	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.
166	166
167	167	//Conversion guidance for implementors//
...	...	@@ -170,7 +170,7 @@
170	170
171	171	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.
172	172	)))
173		-|**Hierarchical codelist structures**|(((
	167	+|(% style="width:132px" %)**Hierarchical codelist structures**|(% style="width:819px" %)(((
174	174	The version 2.1 Hierarchical Codelist artefact has been deprecated in version 3.0 and replaced by two new artefacts, Hierarchy and Hierarchy Association.
175	175
176	176	//Conversion guidance for implementors//
...	...	@@ -183,7 +183,7 @@
183	183
184	184	= 3 Information Model =
185	185
186		-== //3.1 Version 3.0 Information Model// ==
	180	+== 3.1 Version 3.0 Information Model ==
187	187
188	188	[[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_6fc573fe.png||height="404" width="718"]]
189	189
...	...	@@ -193,7 +193,7 @@
193	193
194	194	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.
195	195
196		-== //3.2 Key Changes from Version 2.1// ==
	190	+== 3.2 Key Changes from Version 2.1 ==
197	197
198	198	New Maintainable Artefacts
199	199
...	...	@@ -221,7 +221,8 @@
221	221	Removed Maintainable Artefacts
222	222
223	223	* Structure Set – replaced by Structure Map and the four item scheme maps
224		-* Hierarchical Codelist – replaced by Hierarchy and Hierarchy Association • Constraint – replaced by Data Constraint and Metadata Constraint
	218	+* Hierarchical Codelist – replaced by Hierarchy and Hierarchy Association
	219	+* Constraint – replaced by Data Constraint and Metadata Constraint
225	225
226	226	Changed Maintainable Artefacts
227	227
...	...	@@ -235,7 +235,7 @@
235	235
236	236	* GeospatialInformation – a string type where the value is an expression defining a set of geographical features using a purpose-designed syntax
237	237
238		-== //3.3 Areas Unchanged from Version 2.1// ==
	233	+== 3.3 Areas Unchanged from Version 2.1 ==
239	239
240	240	The following areas of the information model are unchanged from version 2.1:
241	241
...	...	@@ -248,7 +248,7 @@
248	248	* Reporting taxonomy
249	249	* Process
250	250
251		-== //3.4 Reference Metadata// ==
	246	+== 3.4 Reference Metadata ==
252	252
253	253	Reference metadata has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
254	254
...	...	@@ -276,86 +276,47 @@
276	276	* TITLE – a multi-lingual data attribute
277	277	* SOURCE_AGENCY – a multi-value data attribute
278	278
279		-<Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
	274	+> <Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
	275	+> <!—- complex multi-value and multi-lingual data attributes ~-~->
	276	+> <Comp id="TITLE" xsi:type="ns1:TITLE_ATTRIBUTE">
	277	+> <Value>
	278	+> <common:Text xml:lang="en">Some English Text</common:Text>
	279	+> <common:Text xml:lang="fr">Quelques textes en anglais</common:Text>
	280	+> </Value>
	281	+> </Comp>
	282	+> <Comp id="SOURCE_AGENCY" xsi:type="ns1:SOURCE_AGENCY_ATTRIBUTE">
	283	+> <Value>4F0</Value>
	284	+> <Value>4D0</Value>
	285	+> <Value>CZ2</Value>
	286	+> </Comp>
	287	+> <!—- metadata attributes are reported like in metadata messages ~-~->
	288	+> <Metadata>
	289	+> <Attribute id="COLLECTION">
	290	+> <Attribute id="METHOD">
	291	+> <Text lang="en">AAA</Text>
	292	+> </Attribute>
	293	+> </Attribute>
	294	+> <Attribute id="CONTACT">
	295	+> <Value>CONTACT 1</Value>
	296	+> <Attribute id="NAME">
	297	+> <Value>Contact 1 Name 1</Value>
	298	+> </Attribute>
	299	+> <Attribute id="NAME">
	300	+> <Value>Contact 1 Name 2</Value>
	301	+> </Attribute>
	302	+> </Attribute>
	303	+> <Attribute id="CONTACT">
	304	+> <Value>CONTACT 2</Value>
	305	+> <Attribute id="NAME">
	306	+> <Value>Contact 2 Name 1</Value>
	307	+> </Attribute>
	308	+> <Attribute id="NAME">
	309	+> <Value>Contact 2 Name 2</Value>
	310	+> </Attribute>
	311	+> </Attribute>
	312	+> </Metadata>
	313	+> </Obs>
280	280
281		-<!—- complex multi-value and multi-lingual data attributes ~-~->
282		-
283		-<Comp id="TITLE" xsi:type="ns1:TITLE_ATTRIBUTE">
284		-
285		-<Value>
286		-
287		-<common:Text xml:lang="en">Some English Text</common:Text>
288		-
289		-<common:Text xml:lang="fr">Quelques textes en anglais</common:Text>
290		-
291		-</Value>
292		-
293		-</Comp>
294		-
295		-<Comp id="SOURCE_AGENCY" xsi:type="ns1:SOURCE_AGENCY_ATTRIBUTE">
296		-
297		-<Value>4F0</Value>
298		-
299		-<Value>4D0</Value>
300		-
301		-<Value>CZ2</Value>
302		-
303		-</Comp>
304		-
305		-<!—- metadata attributes are reported like in metadata messages ~-~->
306		-
307		-<Metadata>
308		-
309		-<Attribute id="COLLECTION">
310		-
311		-<Attribute id="METHOD">
312		-
313		-<Text lang="en">AAA</Text>
314		-
315		-</Attribute>
316		-
317		-</Attribute>
318		-
319		-<Attribute id="CONTACT">
320		-
321		-<Value>CONTACT 1</Value>
322		-
323		-<Attribute id="NAME">
324		-
325		-<Value>Contact 1 Name 1</Value>
326		-
327		-</Attribute>
328		-
329		-<Attribute id="NAME">
330		-
331		-<Value>Contact 1 Name 2</Value>
332		-
333		-</Attribute>
334		-
335		-</Attribute>
336		-
337		-<Attribute id="CONTACT">
338		-
339		-<Value>CONTACT 2</Value>
340		-
341		-<Attribute id="NAME">
342		-
343		-<Value>Contact 2 Name 1</Value>
344		-
345		-</Attribute>
346		-
347		-<Attribute id="NAME">
348		-
349		-<Value>Contact 2 Name 2</Value>
350		-
351		-</Attribute>
352		-
353		-</Attribute>
354		-
355		-</Metadata>
356		-
357		-</Obs>
358		-
359	359	=== New - Metadata Provision Agreement ===
360	360
361	361	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.
...	...	@@ -368,66 +368,43 @@
368	368
369	369	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.
370	370
371		-== //3.5 Microdata Exchange// ==
	327	+== 3.5 Microdata Exchange ==
372	372
373	373	Several changes have been made the Data Structure Definition to support microdata use cases in addition to aggregated time series.
374	374
375		-=== Multiple measures ===
	331	+(% class="wikigeneratedid" id="HMultiplemeasures" %)
	332	+**Multiple measures**
	333	+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 Data Structure Definition, and can be either mandatory or conditional. Creating a measure with the “MEASURE” concept role applied emulates the version 2.1 MeasureDimension behaviour as illustrated in the SDMX-ML example below:
376	376
377		-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
	335	+> <str:MeasureList id=”MeasureDescriptor”>
	336	+> <str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
	337	+> <Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
	338	+> </str:ConceptIdentity>
	339	+> <str:LocalRepresentation>
	340	+> <str:TextFormat textType=”String” isMultiLingual=”true” />
	341	+> </str:LocalRepresentation>
	342	+> <str:ConceptRole>
	343	+> <Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
	344	+> </str:ConceptRole>
	345	+> </str:Measure>
	346	+> ...
	347	+> <str:Measure>
	348	+> </str:MeasureList>
378	378
379		-Data Structure Definition, and can be either mandatory or conditional. Creating a measure with the “MEASURE” concept role applied emulates the version 2.1
	350	+(% class="wikigeneratedid" id="HMulti-valuemeasuresandattributes" %)
	351	+**Multi-value measures and attributes**
	352	+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 //mandatory// or optional. In the SDMX-ML measure 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.
380	380
381		-MeasureDimension behaviour as illustrated in the SDMX-ML example below:
382		-
383		-<str:MeasureList id=”MeasureDescriptor”>
384		-
385		-<str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
386		-
387		-<Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
388		-
389		-</str:ConceptIdentity>
390		-
391		-<str:LocalRepresentation>
392		-
393		-<str:TextFormat textType=”String” isMultiLingual=”true” />
394		-
395		-</str:LocalRepresentation>
396		-
397		-<str:ConceptRole>
398		-
399		-<Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
400		-
401		-</str:ConceptRole>
402		-
403		-</str:Measure>
404		-
405		-...
406		-
407		-<str:Measure>
408		-
409		-</str:MeasureList>
410		-
411		-=== Multi-value measures and attributes ===
412		-
413		-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
414		-
415		-//mandatory// or optional. In the SDMX-ML measure example above, the properties
416		-
417		-//minOccurs=”1” maxOccurs=”1” usage=”mandatory”// specify that OBS_VALUE must be 198 reported, and can only consist of a single value.
418		-
419		-=== Attributes relationship to measures ===
420		-
	354	+(% class="wikigeneratedid" id="HAttributesrelationshiptomeasures" %)
	355	+**Attributes relationship to measures**
421	421	In addition to attaching attributes to a specific level within the dataset, their relationship 202 to measures can also be defined.
422	422
423		-=== Value lists ===
	358	+(% class="wikigeneratedid" id="HValuelists" %)
	359	+**Value lists**
	360	+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. That allows ValueItems (the equivalent to Code) to contain symbols like ‘¥’ and ‘€’, but also means they are not identifiable.
424	424
425		-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.
	362	+== 3.6 Geospatial Data Exchange ==
426	426
427		-That allows ValueItems (the equivalent to Code) to contain symbols like ‘¥’ and ‘€’, but 208 also means they are not identifiable.
428		-
429		-== //3.6 Geospatial Data Exchange// ==
430		-
431	431	The version 3.0 model has been extended to provide explicit support for geospatial data.
432	432
433	433	=== GeospatialInformation type ===
...	...	@@ -441,14 +441,14 @@
441	441	* 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.
442	442	* 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.
443	443
444		-=== //3.7 Structure Mapping// ===
	377	+== 3.7 Structure Mapping ==
445	445
446	446	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.
447	447
448	448	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.
449	449
450		-==== Many-to-many source and target components ====
451		-
	383	+(% class="wikigeneratedid" id="HMany-to-manysourceandtargetcomponents" %)
	384	+**Many-to-many source and target components**
452	452	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:
453	453
454	454	Set the output component INDICATOR=”DE_A” if the input components are FREQ=”A” and REF_AREA=”DE”.
...	...	@@ -458,22 +458,21 @@
458	458	Set the output components FREQ=”A”, REF_AREA=”DE” if the input component INDICATOR=”DE_A”.
459	459
460	460	**Fixed source and target**
461		-
462	462	The Structure Map may now define input or output components which have a fixed value.
463	463
464		-==== Time representations mapping ====
465		-
	396	+(% class="wikigeneratedid" id="HTimerepresentationsmapping" %)
	397	+**Time representations mapping**
466	466	Non SDMX time representations may now be described in a Structure Map, allowing them to be mapped into SDMX time formats.
467	467
468		-==== Regular expression and substring mappings ====
469		-
	400	+(% class="wikigeneratedid" id="HRegularexpressionandsubstringmappings" %)
	401	+**Regular expression and substring mappings**
470	470	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.
471	471
472		-==== Item maps validity period ====
473		-
	404	+(% class="wikigeneratedid" id="HItemmapsvalidityperiod" %)
	405	+**Item maps validity period**
474	474	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.
475	475
476		-=== //3.8 Constraints// ===
	408	+== 3.8 Constraints ==
477	477
478	478	Constraints in version 3.0 are modelled using two separate artefacts which replace the version 2.1 content constraint:
479	479
...	...	@@ -488,23 +488,23 @@
488	488
489	489	Attachment constraints have been deprecated due to a lack of use cases.
490	490
491		-=== //3.9 Code List Extension// ===
	423	+== 3.9 Code List Extension ==
492	492
493	493	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.
494	494
495	495	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.
496	496
497		-=== //3.10 Discriminated Union of Code Lists// ===
	429	+== 3.10 Discriminated Union of Code Lists ==
498	498
499	499	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.
500	500
501		-=== //3.11 Code Hierarchies// ===
	433	+== 3.11 Code Hierarchies ==
502	502
503	503	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).
504	504
505	505	= 4 Versioning of Structural Metadata Artefacts =
506	506
507		-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.
	439	+Version 3.0 adopts semantic versioning principles for versioning of metadata artefacts following the rules set out at __[[https:~~/~~/semver.org>>https://semver.org]] __However, this is not mandatory, and organisations may continue to use the pre-existing two-digit versioning strategy, or not to version artefacts by omitting the //version// property. The version number no longer defaults to 1.0 if not explicitly set.
508	508
509	509	Semantic version numbers are three digits:
510	510
...	...	@@ -546,7 +546,7 @@
546	546
547	547	= 5 REST Web Services API =
548	548
549		-== //5.1 Simplified list of resources// ==
	481	+== 5.1 Simplified list of resources ==
550	550
551	551	The version 3.0 REST API has just five main resources:
552	552
...	...	@@ -560,7 +560,7 @@
560	560
561	561	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.
562	562
563		-== //5.2 Improved data queries// ==
	495	+== 5.2 Improved data queries ==
564	564
565	565	Data queries have been changed to provide more granular selections from contexts wider than just a Dataflow.
566	566
...	...	@@ -586,11 +586,12 @@
586	586
587	587	/data/dataflow/ESTAT/ICP?c[REF_AREA]=DE&c[ICP_ITEM]=sw:01&c[TIME_PERIOD]=ge:2015 Operators include:
588	588
589		-|eq|Equals
590		-|ne|Not equal to
591		-|le|Less than
592		-|ge|Greater than or equal to
593		-|sw|Starts with
	521	+(% style="width:531.039px" %)
	522	+|(% style="width:151px" %)eq|(% style="width:378px" %)Equals
	523	+|(% style="width:151px" %)ne|(% style="width:378px" %)Not equal to
	524	+|(% style="width:151px" %)le|(% style="width:378px" %)Less than
	525	+|(% style="width:151px" %)ge|(% style="width:378px" %)Greater than or equal to
	526	+|(% style="width:151px" %)sw|(% style="width:378px" %)Starts with
594	594
595	595	=== Support for multiple keys ===
596	596
...	...	@@ -598,7 +598,7 @@
598	598
599	599	/data/dataflow/ESTAT/ICP/1.0.0/M…A.ANR,M…A.INX,M…B.CTG
600	600
601		-== //5.3 Improved reference metadata queries// ==
	534	+== 5.3 Improved reference metadata queries ==
602	602
603	603	Reference metadata queries have been improved with a number of new options to retrieve metadata reports.
604	604
...	...	@@ -614,7 +614,7 @@
614	614
615	615	/metadata/structure/datastructure/BIS/BIS_CBS/1.0
616	616
617		-== //5.4 Structural metadata maintenance// ==
	550	+== 5.4 Structural metadata maintenance ==
618	618
619	619	Support has been added for maintenance of structural metadata.
620	620
...	...	@@ -622,7 +622,7 @@
622	622
623	623	= 6 XML, JSON, CSV and EDI Transmission formats =
624	624
625		-== //6.1 SDMX-ML// ==
	558	+== 6.1 SDMX-ML ==
626	626
627	627	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.
628	628
...	...	@@ -632,47 +632,49 @@
632	632
633	633	Additionally, the way the individual artefacts are organised into ‘collections’ within the message has been significantly revised with a simpler flat structure adopted as set out in the following table:
634	634
635		-|**Artefact type**|**Version 2.1 Collection**|**Version 3.0 Collection**
636		-|AgencyScheme|OrganisationSchemes|AgencySchemes
637		-|DataConsumerScheme|OrganisationSchemes|DataConsumerSchemes
638		-|DataProviderScheme|OrganisationSchemes|DataProviderSchemes
639		-|MetadataProviderScheme|OrganisationSchemes|MetadataProviderSchemes
640		-|OrganisationUnitScheme|OrganisationSchemes|OrganisationUnitSchemes
641		-|GeographicCodelist|Codelists|GeographicCodelists
642		-|GeoGridCodelist|Codelists|GeoGridCodelists
643		-|ConceptScheme|Concepts|ConceptSchemes
644		-|ValueList|Codelists|ValueLists
645		-|StructureMap|StructureMappings|StructureMaps
646		-|RepresentationMap|StructureMappings|RepresentationMaps
647		-|ConceptSchemeMap|StructureMappings|ConceptSchemeMaps
648		-|CategorySchemeMap|StructureMappings|CategorySchemeMaps
649		-|OrganisationSchemeMap|StructureMappings|OrganisationSchemeMaps
650		-|ReportingTaxonomyMap|StructureMappings|ReportingTaxonomyMaps
651		-|DataConstraint|Constraints|DataConstraints
652		-|MetadataConstraint|Constraints|MetadataConstraints
653		-|MetadataProvisionAgreement|ProvisionAgreement|MetadataProvisionAgreements
654		-|CustomTypeScheme|CustomTypes|CustomTypeSchemes
655		-|VtlMappingScheme|VtlMappings|VtlMappingSchemes
656		-|NamePersonalisationScheme|NamePersonalisations|NamePersonalisationSchemes
657		-|RulesetScheme|Rulesets|RulesetSchemes
658		-|TransformationScheme|Transformations|TransformationSchemes
659		-|UserDefinedOperatorScheme|UserDefinedOperators|UserDefinedOperatorSchemes
	568	+(% style="width:1102.04px" %)
	569	+|(% style="width:321px" %)**Artefact type**|(% style="width:351px" %)**Version 2.1 Collection**|(% style="width:426px" %)**Version 3.0 Collection**
	570	+|(% style="width:321px" %)AgencyScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)AgencySchemes
	571	+|(% style="width:321px" %)DataConsumerScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataConsumerSchemes
	572	+|(% style="width:321px" %)DataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)DataProviderSchemes
	573	+|(% style="width:321px" %)MetadataProviderScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)MetadataProviderSchemes
	574	+|(% style="width:321px" %)OrganisationUnitScheme|(% style="width:351px" %)OrganisationSchemes|(% style="width:426px" %)OrganisationUnitSchemes
	575	+|(% style="width:321px" %)GeographicCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeographicCodelists
	576	+|(% style="width:321px" %)GeoGridCodelist|(% style="width:351px" %)Codelists|(% style="width:426px" %)GeoGridCodelists
	577	+|(% style="width:321px" %)ConceptScheme|(% style="width:351px" %)Concepts|(% style="width:426px" %)ConceptSchemes
	578	+|(% style="width:321px" %)ValueList|(% style="width:351px" %)Codelists|(% style="width:426px" %)ValueLists
	579	+|(% style="width:321px" %)StructureMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)StructureMaps
	580	+|(% style="width:321px" %)RepresentationMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)RepresentationMaps
	581	+|(% style="width:321px" %)ConceptSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ConceptSchemeMaps
	582	+|(% style="width:321px" %)CategorySchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)CategorySchemeMaps
	583	+|(% style="width:321px" %)OrganisationSchemeMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)OrganisationSchemeMaps
	584	+|(% style="width:321px" %)ReportingTaxonomyMap|(% style="width:351px" %)StructureMappings|(% style="width:426px" %)ReportingTaxonomyMaps
	585	+|(% style="width:321px" %)DataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)DataConstraints
	586	+|(% style="width:321px" %)MetadataConstraint|(% style="width:351px" %)Constraints|(% style="width:426px" %)MetadataConstraints
	587	+|(% style="width:321px" %)MetadataProvisionAgreement|(% style="width:351px" %)ProvisionAgreement|(% style="width:426px" %)MetadataProvisionAgreements
	588	+|(% style="width:321px" %)CustomTypeScheme|(% style="width:351px" %)CustomTypes|(% style="width:426px" %)CustomTypeSchemes
	589	+|(% style="width:321px" %)VtlMappingScheme|(% style="width:351px" %)VtlMappings|(% style="width:426px" %)VtlMappingSchemes
	590	+|(% style="width:321px" %)NamePersonalisationScheme|(% style="width:351px" %)NamePersonalisations|(% style="width:426px" %)NamePersonalisationSchemes
	591	+|(% style="width:321px" %)RulesetScheme|(% style="width:351px" %)Rulesets|(% style="width:426px" %)RulesetSchemes
	592	+|(% style="width:321px" %)TransformationScheme|(% style="width:351px" %)Transformations|(% style="width:426px" %)TransformationSchemes
	593	+|(% style="width:321px" %)UserDefinedOperatorScheme|(% style="width:351px" %)UserDefinedOperators|(% style="width:426px" %)UserDefinedOperatorSchemes
660	660
661	661	No changes have been made to the way the following artefacts are organised in the structure message:
662	662
663		-|**Artefact type**|**Collection**
664		-|Dataflow|Dataflows
665		-|Metadataflow|Metadataflows
666		-|CategoryScheme|CategorySchemes
667		-|Categorisation|Categorisations
668		-|Codelist|Codelists
669		-|Hierarchy|Hierarchies
670		-|HierarchyAssociation|HierarchyAssociations
671		-|MetadataStructure|MetadataStructures
672		-|DataStructure|DataStructures
673		-|ReportingTaxonomy|ReportingTaxonomies
674		-|Process|Processes
675		-|ProvisionAgreement|ProvisionAgreements
	597	+(% style="width:1106.04px" %)
	598	+|(% style="width:326px" %)**Artefact type**|(% style="width:776px" %)**Collection**
	599	+|(% style="width:326px" %)Dataflow|(% style="width:776px" %)Dataflows
	600	+|(% style="width:326px" %)Metadataflow|(% style="width:776px" %)Metadataflows
	601	+|(% style="width:326px" %)CategoryScheme|(% style="width:776px" %)CategorySchemes
	602	+|(% style="width:326px" %)Categorisation|(% style="width:776px" %)Categorisations
	603	+|(% style="width:326px" %)Codelist|(% style="width:776px" %)Codelists
	604	+|(% style="width:326px" %)Hierarchy|(% style="width:776px" %)Hierarchies
	605	+|(% style="width:326px" %)HierarchyAssociation|(% style="width:776px" %)HierarchyAssociations
	606	+|(% style="width:326px" %)MetadataStructure|(% style="width:776px" %)MetadataStructures
	607	+|(% style="width:326px" %)DataStructure|(% style="width:776px" %)DataStructures
	608	+|(% style="width:326px" %)ReportingTaxonomy|(% style="width:776px" %)ReportingTaxonomies
	609	+|(% style="width:326px" %)Process|(% style="width:776px" %)Processes
	610	+|(% style="width:326px" %)ProvisionAgreement|(% style="width:776px" %)ProvisionAgreements
676	676
677	677	From version 3.0, collections can appear in any order within a structure message.
678	678
...	...	@@ -706,7 +706,7 @@
706	706
707	707	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.
708	708
709		-== //6.2 SDMX-JSON// ==
	644	+== 6.2 SDMX-JSON ==
710	710
711	711	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.
712	712
...	...	@@ -726,7 +726,7 @@
726	726
727	727	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.
728	728
729		-== //6.3 SDMX-CSV// ==
	664	+== 6.3 SDMX-CSV ==
730	730
731	731	CSV in SDMX is used transmission of data and reference metadata only.
732	732
...	...	@@ -744,7 +744,7 @@
744	744
745	745	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.
746	746
747		-=== //6.4 EDI deprecation// ===
	682	+=== 6.4 EDI deprecation ===
748	748
749	749	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.
750	750

SUZ.Methodology.Code.MethodologyClass[0]