Changes for page SDMX 3.1 Standards. Section 5. Registry Specification: Logical Interfaces

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Title

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	1	+1 Introduction

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1		-{{box title="**Contents**"}}
2		-{{toc/}}
3		-{{/box}}
4		-
5	5	**Revision History**
6	6
7		-(% style="width:824.835px" %)
8		-|(% style="width:184px" %)**Revision**|(% style="width:195px" %)**Date**|(% style="width:442px" %)**Contents**
9		-|(% style="width:184px" %)DRAFT 1.0|(% style="width:195px" %)December 2024|(% style="width:442px" %)Draft release updated for SDMX 3.1 for public consultation
10		-|(% style="width:184px" %)1.0|(% style="width:195px" %)May 2025|(% style="width:442px" %)Public release for SDMX 3.1
	3	+:
11	11
12		-= 1 Introduction =
	5	+(((
	6	+|**Revision**|**Date**|**Contents**
	7	+|DRAFT 1.0|December 2024|Draft release updated for SDMX 3.1 for public consultation
	8	+|1.0|May 2025|Public release for SDMX 3.1
	9	+)))
13	13
	11	+= {{id name="_Toc90780"/}}1 Introduction =
	12	+
14	14	The business vision for SDMX envisages the promotion of a “data sharing” model to facilitate low-cost, high-quality statistical data and metadata exchange. Data sharing reduces the reporting burden of organisations by allowing them to publish data once and let their counterparties “pull” data and related metadata as required. The scenario is based on:
15	15
16	16	* the availability of an abstract information model capable of supporting time series and cross-sectional data, structural metadata, and reference metadata (SDMX-IM)
...	...	@@ -31,13 +31,15 @@
31	31
32	32	These architectural standards address the ‘how’, rather than the ‘what’, and are aimed at enabling existing SDMX standards to achieve their mission. The architectural standards address registry services, which initially comprise:
33	33
34		-* structural metadata repository
35		-* data and metadata registration
36		-* query
	33	+• structural metadata repository
37	37
	35	+• data and metadata registration
	36	+
	37	+• query
	38	+
38	38	The registry services outlined in this specification are designed to help the SDMX community manage the proliferation of SDMX assets and to support data sharing for reporting and dissemination.
39	39
40		-= 2 Scope and Normative Status =
	41	+= {{id name="_Toc90781"/}}2 Scope and Normative Status =
41	41
42	42	The scope of this document is to specify the logical interfaces for the SDMX registry in terms of the functions required and the data that may be present in the function call, and the behaviour expected of the registry.
43	43
...	...	@@ -54,9 +54,9 @@
54	54
55	55	Note that although the term “authorised user” is used in this document, the SDMX standards do not define an access control mechanism. Such a mechanism, if required, must be chosen and implemented by the registry software provider.
56	56
57		-= 3 Scope of the SDMX Registry/Repository =
	58	+= {{id name="_Toc90782"/}}3 Scope of the SDMX Registry/Repository =
58	58
59		-== 3.1 Objective ==
	60	+=== {{id name="_Toc90783"/}}3.1 Objective ===
60	60
61	61	The objective of the SDMX registry/repository is, in broad terms, to allow organisations to publish statistical data and reference metadata in known formats such that interested third parties can discover these data and interpret them accurately and correctly. The mechanism for doing this is twofold:
62	62
...	...	@@ -63,7 +63,7 @@
63	63	1. To maintain and publish structural metadata that describes the structure and valid content of data and reference metadata sources such as databases, metadata repositories, data sets, metadata sets. This structural metadata enables software applications to understand and to interpret the data and reference metadata in these sources.
64	64	1. To enable applications, organisations, and individuals to share and to discover data and reference metadata. This facilitates data and reference metadata dissemination by implementing the data sharing vision of SDMX.
65	65
66		-== 3.2 Structural Metadata ==
	67	+=== {{id name="_Toc90784"/}}3.2 Structural Metadata ===
67	67
68	68	Setting up structural metadata and the exchange context (referred to as “data provisioning”) involves the following steps for maintenance agencies:
69	69
...	...	@@ -89,7 +89,7 @@
89	89
90	90	In that context, the term “Metadata” refers to reference metadata.
91	91
92		-== 3.3 Registration ==
	93	+=== {{id name="_Toc90785"/}}3.3 Registration ===
93	93
94	94	Publishing the data and reference metadata involves the following steps for a Data/Metadata Provider:
95	95
...	...	@@ -100,13 +100,13 @@
100	100
101	101	**Figure 2: Schematic of Registered Data and Metadata Sources in the SDMX-IM**
102	102
103		-== 3.4 Notification ==
	104	+=== {{id name="_Toc90786"/}}3.4 Notification ===
104	104
105	105	Notifying interested parties of newly published or re-published data, reference metadata or changes in structural metadata involves:
106	106
107	107	• registry support of a subscription-based notification service which sends an email or notifies an HTTP address announcing all published data that meets the criteria contained in the subscription request.
108	108
109		-== 3.5 Discovery ==
	110	+=== {{id name="_Toc90787"/}}3.5 Discovery ===
110	110
111	111	Discovering published data and reference metadata involves interaction with the registry to fulfil the following logical steps that would be carried out by a user interacting with a service that itself interacts with the registry and an SDMX-enabled data or reference metadata resource:
112	112
...	...	@@ -118,9 +118,9 @@
118	118
119	119	**Figure 3: Schematic of Data and Metadata Discovery and Query in the SDMX-IM**
120	120
121		-= 4 SDMX Registry/Repository Architecture =
	122	+= {{id name="_Toc90788"/}}4 SDMX Registry/Repository Architecture =
122	122
123		-== 4.1 Architectural Schematic ==
	124	+=== {{id name="_Toc90789"/}}4.1 Architectural Schematic ===
124	124
125	125	The architecture of the SDMX registry/repository is derived from the objectives stated above. It is a layered architecture that is founded by a structural metadata repository which supports a provisioning metadata repository which supports the registry services. These are all supported by the SDMX-ML schemas. Applications can be built on top of these services which support the reporting, storage, retrieval, and dissemination aspects of the statistical lifecycle as well as the maintenance of the structural metadata required to drive these applications.
126	126
...	...	@@ -128,7 +128,7 @@
128	128
129	129	**Figure 4: Schematic of the Registry Content and Services**
130	130
131		-== 4.2 Structural Metadata Repository ==
	132	+=== {{id name="_Toc90790"/}}4.2 Structural Metadata Repository ===
132	132
133	133	The basic layer is that of a structural metadata service which supports the lifecycle of SDMX structural metadata artefacts such as Maintenance Agencies, Data Structure Definitions, Metadata Structure Definitions, Provision Agreements, Processes etc. This layer is supported by the Structure Submission and Query Service.
134	134
...	...	@@ -139,15 +139,15 @@
139	139
140	140	As of the initial version of SDMX 3.0 no messages are defined to support these artefacts; hence, users may need to use SDMX 2.1 Registry Interface messages, instead.
141	141
142		-== 4.3 Provisioning Metadata Repository ==
	143	+=== {{id name="_Toc90791"/}}4.3 Provisioning Metadata Repository ===
143	143
144	144	The function of this repository is to support the definition of the structural metadata that describes the various types of data-store which model SDMX-conformant databases or files, and to link to these data sources. These links can be specified for a data/metadata provider, for a specific data or metadata flow. In the SDMX model this is called the Provision or Metadata Provision Agreement.
145	145
146	146	This layer is supported by the Data and Metadata Registration Service.
147	147
148		-= 5 Registry Interfaces and Services =
	149	+= {{id name="_Toc90792"/}}5 Registry Interfaces and Services =
149	149
150		-== 5.1 Registry Interfaces ==
	151	+=== {{id name="_Toc90793"/}}5.1 Registry Interfaces ===
151	151
152	152	The Registry Interfaces are:
153	153
...	...	@@ -173,17 +173,17 @@
173	173
174	174	It should be noted that all interactions are assumed to be synchronous, with the exception of Notify Registry Event. This document is sent by the SDMX-RR to all subscribers whenever an even occurs to which any users have subscribed. Thus, it does not conform to the requestresponse pattern, because it is inherently asynchronous.
175	175
176		-== 5.2 Registry Services ==
	177	+=== {{id name="_Toc90794"/}}5.2 Registry Services ===
177	177
178		-=== 5.2.1 Introduction ===
	179	+===== {{id name="_Toc90795"/}}5.2.1 Introduction =====
179	179
180	180	The services described in this section do not imply that each is implemented as a discrete web service.
181	181
182		-=== 5.2.2 Structure Submission Service ===
	183	+===== {{id name="_Toc90796"/}}5.2.2 Structure Submission Service =====
183	183
184	184	The registry must support a mechanism for submitting structural metadata. This mechanism can be the SDMX REST interface for structural metadata (this is defined in the corresponding GitHub project, dedicated to the SDMX REST API: __[[https:~~/~~/github.com/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest]][[->>url:https://github.com/sdmx-twg/sdmx-rest]][[twg/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest]][[->>url:https://github.com/sdmx-twg/sdmx-rest]][[rest>>url:https://github.com/sdmx-twg/sdmx-rest]]__[[)>>url:https://github.com/sdmx-twg/sdmx-rest]]. In order for the architecture to be scalable, the finest-grained piece of structural metadata that can be processed by the SDMX-RR is a MaintainableArtefact, with the exception of Item Schemes, where changes at an Item level is also possible (see next section on the SDMX Information Model).
185	185
186		-=== 5.2.3 Structure Query Service ===
	187	+===== {{id name="_Toc90797"/}}5.2.3 Structure Query Service =====
187	187
188	188	The registry must support a mechanism for querying for structural metadata. This mechanism can be the SDMX REST interface for structural metadata (this is defined in the corresponding GitHub project, dedicated to the SDMX REST API: __[[https:~~/~~/github.com/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest]][[->>url:https://github.com/sdmx-twg/sdmx-rest]][[twg/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest]][[->>url:https://github.com/sdmx-twg/sdmx-rest]][[rest>>url:https://github.com/sdmx-twg/sdmx-rest]]__[[)>>url:https://github.com/sdmx-twg/sdmx-rest]]. The registry response to this query mechanism is the SDMX Structure message, which has as its root node:
189	189
...	...	@@ -191,7 +191,7 @@
191	191
192	192	The SDMX structural artefacts that may be queried are defined in the SDMX structure web service specification which is compatible with this release of the standard __[[https:~~/~~/github.com/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]][[->>url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]][[twg/sdmx>>url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]][[->>url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]][[rest/blob/master/doc/structures.md>>url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]]__[[url:https://github.com/sdmx-twg/sdmx-rest/blob/master/doc/structures.md]]
193	193
194		-=== 5.2.4 Data and Reference Metadata Registration Service ===
	195	+===== {{id name="_Toc90798"/}}5.2.4 Data and Reference Metadata Registration Service =====
195	195
196	196	This service must implement the following Registry Interfaces:
197	197
...	...	@@ -214,24 +214,23 @@
214	214
215	215	The Registration has an action attribute which takes one of the following values:
216	216
217		-(% style="width:893.835px" %)
218		-|(% style="width:241px" %)**Action Attribute Value**|(% style="width:650px" %)**Behaviour**
219		-|(% style="width:241px" %)Append|(% style="width:650px" %)Add this registration to the registry
220		-|(% style="width:241px" %)Replace|(% style="width:650px" %)Replace the existing Registration with this Registration identified by the id in the Registration of the Submit Registration Request
221		-|(% style="width:241px" %)Delete|(% style="width:650px" %)Delete the existing Registration identified by the id in the Registration of the Submit Registration Request
	218	+|**Action Attribute Value**|**Behaviour**
	219	+|Append|Add this registration to the registry
	220	+|Replace|Replace the existing Registration with this Registration identified by the id in the Registration of the Submit Registration Request
	221	+|Delete|Delete the existing Registration identified by the id in the Registration of the Submit Registration Request
222	222
223	223	The Registration has three Boolean attributes which may be present to determine how an SDMX compliant dataset or metadataset indexing application must index the datasets or metadatasets upon registration. The indexing application behaviour is as follows:
224	224
225		-(% style="width:896.835px" %)
226		-|**Boolean Attribute**|(% style="width:712px" %)**Behaviour if Value is “true”**
227		-|indexTimeSeries|(% style="width:712px" %)A compliant indexing application must index all the time series keys
228		-|indexDataSet|(% style="width:712px" %)(((
	225	+|**Boolean Attribute**|**Behaviour if Value is “true”**
	226	+|indexTimeSeries|A compliant indexing application must index all the time series keys
	227	+|indexDataSet|(((
229	229	A compliant indexing application must index the range of actual (present) values for each dimension of the Dataset.
	229	+
230	230	Note that for data this requires much less storage than full key indexing, but this method cannot guarantee that a specific combination of Dimension values (the Key) is actually present in the Dataset
231	231	)))
232		-|indexReportingPeriod|(% style="width:712px" %)A compliant indexing application must index the time period range(s) for which data are present in the Dataset.
	232	+|indexReportingPeriod|A compliant indexing application must index the time period range(s) for which data are present in the Dataset.
233	233
234		-=== 5.2.5 Data Discovery ===
	234	+===== {{id name="_Toc90799"/}}5.2.5 Data Discovery =====
235	235
236	236	The Data Discovery Service implements the following Registry Interfaces:
237	237
...	...	@@ -238,7 +238,7 @@
238	238	* QueryRegistrationRequest
239	239	* QueryRegistrationResponse
240	240
241		-=== 5.2.6 Subscription and Notification ===
	241	+===== {{id name="_Toc90800"/}}5.2.6 Subscription and Notification =====
242	242
243	243	The Subscription and Notification Service implements the following Registry Interfaces:
244	244
...	...	@@ -257,7 +257,7 @@
257	257
258	258	Notification requires that the structural metadata repository and the provisioning metadata repository monitor any event which is of interest to a user (the object of a subscription request query), and to issue an SDMX notification document to the endpoints specified in the relevant subscriptions.
259	259
260		-=== 5.2.7 Registry Behaviour ===
	260	+===== {{id name="_Toc90801"/}}5.2.7 Registry Behaviour =====
261	261
262	262	The following table defines the behaviour of the SDMX Registry for the various Registry Interface messages. It should be noted, though, that as of SDMX 3.0, an extended versioning scheme newly including semantic versioning is foreseen for all Maintainable Artefacts. Moreover, while the old versioning scheme is allowed, given there is no more a "final" flag, there is no way guaranteeing the consistency across version of a Maintainable, unless semantic versioning is used.
263	263
...	...	@@ -271,7 +271,7 @@
271	271
272	272	1. Be a draft version.
273	273
274		-b) Not be explicitly^^[[(% class="wikiinternallink wikiinternallink" %)^^1^^>>path:#sdfootnote1sym||name="sdfootnote1anc"]](%%)^^ referenced from any other object in the Registry.
	274	+b) Not be explicitly^^[[^^1^^>>path:#sdfootnote1sym||name="sdfootnote1anc"]]^^ referenced from any other object in the Registry.
275	275
276	276	4) The semantic versioning rules in the SDMX documentation MUST be obeyed.
277	277	)))
...	...	@@ -309,47 +309,47 @@
309	309
310	310	• //Maintainable//
311	311
312		-| |(% colspan="2" %)**Object Type**|(% colspan="2" %)**Data Attributes**|(% colspan="2" %)**Status**|(% colspan="2" %)**Data type**|(% colspan="2" %)**Notes**
313		-| |(% colspan="2" rowspan="4" %)//Annotable//|(% colspan="2" %)AnnotationTitle|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
314		-| |(% colspan="2" %)AnnotationType|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
315		-| |(% colspan="2" %)AnnotationURN|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
316		-| |(% colspan="2" %)(((
	312	+||(% colspan="2" %)**Object Type**|(% colspan="2" %)**Data Attributes**|(% colspan="2" %)**Status**|(% colspan="2" %)**Data type**|(% colspan="2" %)**Notes**
	313	+||(% colspan="2" rowspan="4" %)//Annotable//|(% colspan="2" %)AnnotationTitle|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
	314	+||(% colspan="2" %)AnnotationType|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
	315	+||(% colspan="2" %)AnnotationURN|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
	316	+||(% colspan="2" %)(((
317	317	AnnotationText in the form of
318	318
319	319	InternationalString
320		-)))|(% colspan="2" %)C|(% colspan="2" %) |(% colspan="2" %)This can have languagespecific variants
321		-| |(% colspan="2" rowspan="4" %)//Identifiable//|(% colspan="2" %)All content as for //Annotable// plus|(% colspan="2" %) |(% colspan="2" %) |(% colspan="2" %)
322		-| |(% colspan="2" %)id|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)
323		-| |(% colspan="2" %)uri|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
324		-| |(% colspan="2" %)urn|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)Although the urn is computable and therefore may not be submitted or stored physically, the Registry must return the urn for each object, and must be able to service a query on an object referenced solely by its urn.
325		-| |(% colspan="2" rowspan="3" %)//Nameable//|(% colspan="2" %)(((
	320	+)))|(% colspan="2" %)C|(% colspan="2" %)|(% colspan="2" %)This can have languagespecific variants
	321	+||(% colspan="2" rowspan="4" %)//Identifiable//|(% colspan="2" %)All content as for //Annotable// plus|(% colspan="2" %)|(% colspan="2" %)|(% colspan="2" %)
	322	+||(% colspan="2" %)id|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)
	323	+||(% colspan="2" %)uri|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)
	324	+||(% colspan="2" %)urn|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)Although the urn is computable and therefore may not be submitted or stored physically, the Registry must return the urn for each object, and must be able to service a query on an object referenced solely by its urn.
	325	+||(% colspan="2" rowspan="3" %)//Nameable//|(% colspan="2" %)(((
326	326	All content as for
327	327
328	328	//Identifiable// plus
329		-)))|(% colspan="2" %) |(% colspan="2" %) |(% colspan="2" %)
330		-| |(% colspan="2" %)(((
	329	+)))|(% colspan="2" %)|(% colspan="2" %)|(% colspan="2" %)
	330	+||(% colspan="2" %)(((
331	331	Name in the form of
332	332
333	333	InternationalString
334	334	)))|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)This can have language specific variants.
335		-| |(% colspan="2" %)(((
	335	+||(% colspan="2" %)(((
336	336	Description in the form of
337	337
338	338	InternationalString
339	339	)))|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)This can have language specific variants.
340		-| |(% colspan="2" rowspan="4" %)//Versionable//|(% colspan="2" %)(((
	340	+||(% colspan="2" rowspan="4" %)//Versionable//|(% colspan="2" %)(((
341	341	All content as for
342	342
343	343	//Identifiable// plus
344		-)))|(% colspan="2" %) |(% colspan="2" %) |(% colspan="2" %)
345		-| |(% colspan="2" %)version|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)This is the version number according to SDMX versioning rules.
346		-| |(% colspan="2" %)validFrom|(% colspan="2" %)C|(% colspan="2" %)Date/time|(% colspan="2" %)
347		-| |(% colspan="2" %)validTo|(% colspan="2" %)C|(% colspan="2" %)Date/time|(% colspan="2" %)
348		-|(% colspan="2" rowspan="5" %)//Maintainable//|(% colspan="2" %)All content as for //Versionable// plus|(% colspan="2" %) |(% colspan="2" %) |(% colspan="2" %) |
349		-|(% colspan="2" %)isExternalReference|(% colspan="2" %)C|(% colspan="2" %)boolean|(% colspan="2" %)Value of “true” indicates that the actual resource is held outside of this registry. The actual reference is given in the registry URI or the structureURL, each of which must return a valid SDMX-ML file.|
350		-|(% colspan="2" %)serviceURL|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)The url of the service that can be queried for this resource.|
351		-|(% colspan="2" %)structureURL|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)The url of the resource.|
352		-|(% colspan="2" %)(Maintenance) organisationId|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)The object must be linked to a maintenance organisation, i.e., Agency or Metadata Provider.|
	344	+)))|(% colspan="2" %)|(% colspan="2" %)|(% colspan="2" %)
	345	+||(% colspan="2" %)version|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)This is the version number according to SDMX versioning rules.
	346	+||(% colspan="2" %)validFrom|(% colspan="2" %)C|(% colspan="2" %)Date/time|(% colspan="2" %)
	347	+||(% colspan="2" %)validTo|(% colspan="2" %)C|(% colspan="2" %)Date/time|(% colspan="2" %)
	348	+|(% colspan="2" rowspan="5" %)//Maintainable//|(% colspan="2" %)All content as for //Versionable// plus|(% colspan="2" %)|(% colspan="2" %)|(% colspan="2" %)|
	349	+|(% colspan="2" %)isExternalReference|(% colspan="2" %)C|(% colspan="2" %)boolean|(% colspan="2" %)Value of “true” indicates that the actual resource is held outside of this registry. The actual reference is given in the registry URI or the structureURL, each of which must return a valid SDMX-ML file.|
	350	+|(% colspan="2" %)serviceURL|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)The url of the service that can be queried for this resource.|
	351	+|(% colspan="2" %)structureURL|(% colspan="2" %)C|(% colspan="2" %)string|(% colspan="2" %)The url of the resource.|
	352	+|(% colspan="2" %)(Maintenance) organisationId|(% colspan="2" %)M|(% colspan="2" %)string|(% colspan="2" %)The object must be linked to a maintenance organisation, i.e., Agency or Metadata Provider.|
353	353
354	354	**Table 1: Common Attributes of Object Types**
355	355
...	...	@@ -511,92 +511,92 @@
511	511
512	512	|**Package**|**URN class name (model class name where this is different)**
513	513	|base|Agency
514		-| |AgencyScheme
515		-| |DataConsumer
516		-| |DataConsumerScheme
517		-| |DataProvider
518		-| |DataProviderScheme
519		-| |MetadataProvider
520		-| |MetadataProviderScheme
521		-| |OrganisationUnit
522		-| |OrganisationUnitScheme
523		-| |
	514	+||AgencyScheme
	515	+||DataConsumer
	516	+||DataConsumerScheme
	517	+||DataProvider
	518	+||DataProviderScheme
	519	+||MetadataProvider
	520	+||MetadataProviderScheme
	521	+||OrganisationUnit
	522	+||OrganisationUnitScheme
	523	+||
524	524	|datastructure|AttributeDescriptor
525		-| |DataAttribute
526		-| |Dataflow
527		-| |DataStructure (DataStructureDefinition)
528		-| |Dimension
529		-| |DimensionDescriptor
530		-| |GroupDimensionDescriptor
531		-| |Measure
532		-| |MeasureDescriptor
533		-| |TimeDimension
534		-| |
	525	+||DataAttribute
	526	+||Dataflow
	527	+||DataStructure (DataStructureDefinition)
	528	+||Dimension
	529	+||DimensionDescriptor
	530	+||GroupDimensionDescriptor
	531	+||Measure
	532	+||MeasureDescriptor
	533	+||TimeDimension
	534	+||
535	535	|metadatastructure|MetadataAttribute
536		-| |MetadataAttributeDescriptor
537		-| |(((
	536	+||MetadataAttributeDescriptor
	537	+||(((
538	538	MetadataStructure
539	539
540	540	(MetadataStructureDefinition)
541	541	)))
542	542
543		-:
	543	+:
544	544
545	545	(((
546	546	|**Package**|**URN class name (model class name where this is different)**
547		-| |Metadataflow
548		-| |MetadataSet
549		-| |
	547	+||Metadataflow
	548	+||MetadataSet
	549	+||
550	550	|process|Process
551		-| |ProcessStep
552		-| |Transition
553		-| |
	551	+||ProcessStep
	552	+||Transition
	553	+||
554	554	|registry|DataConstraint
555		-| |MetadataConstraint
556		-| |MetadataProvisionAgreement
557		-| |ProvisionAgreement
558		-| |Subscription
559		-| |
	555	+||MetadataConstraint
	556	+||MetadataProvisionAgreement
	557	+||ProvisionAgreement
	558	+||Subscription
	559	+||
560	560	|structuremapping|CategorySchemeMap
561		-| |ConceptSchemeMap
562		-| |OrganisationSchemeMap
563		-| |ReportingTaxonomyMap
564		-| |RepresentationMap
565		-| |StructureMap
566		-| |
	561	+||ConceptSchemeMap
	562	+||OrganisationSchemeMap
	563	+||ReportingTaxonomyMap
	564	+||RepresentationMap
	565	+||StructureMap
	566	+||
567	567	|codelist|Code
568		-| |Codelist
569		-| |HierarchicalCode
570		-| |Hierarchy
571		-| |HierarchyAssociation
572		-| |Level
573		-| |ValueList
574		-| |
	568	+||Codelist
	569	+||HierarchicalCode
	570	+||Hierarchy
	571	+||HierarchyAssociation
	572	+||Level
	573	+||ValueList
	574	+||
575	575	|categoryscheme|Categorisation
576		-| |Category
577		-| |CategoryScheme
578		-| |ReportingCategory
579		-| |ReportingTaxonomy
	576	+||Category
	577	+||CategoryScheme
	578	+||ReportingCategory
	579	+||ReportingTaxonomy
580	580	|**Package**|**URN class name (model class name where this is different)**
581		-| |
	581	+||
582	582	|conceptscheme|Concept
583		-| |ConceptScheme
584		-| |
	583	+||ConceptScheme
	584	+||
585	585	|transformation|CustomType
586		-| |CustomTypeScheme
587		-| |NamePersonalisation
588		-| |NamePersonalisationScheme
589		-| |Ruleset
590		-| |RulesetScheme
591		-| |Transformation
592		-| |TransformationScheme
593		-| |UserDefinedOperator
594		-| |UserDefinedOperatorScheme
595		-| |VtlCodelistMapping
596		-| |VtlConceptMapping
597		-| |VtlDataflowMapping
598		-| |VtlMappingScheme
599		-| |
	586	+||CustomTypeScheme
	587	+||NamePersonalisation
	588	+||NamePersonalisationScheme
	589	+||Ruleset
	590	+||RulesetScheme
	591	+||Transformation
	592	+||TransformationScheme
	593	+||UserDefinedOperator
	594	+||UserDefinedOperatorScheme
	595	+||VtlCodelistMapping
	596	+||VtlConceptMapping
	597	+||VtlDataflowMapping
	598	+||VtlMappingScheme
	599	+||
600	600	)))
601	601
602	602	**Table 2: SDMX-IM Packages and Contained Classes**
...	...	@@ -610,7 +610,7 @@
610	610	urn:sdmx.org.sdmx.infomodel.{package}.{classname}=
611	611
612	612	|**Classname**|**Ending URN pattern**|**Example**
613		-|Agency^^[[(% class="wikiinternallink wikiinternallink" %)^^2^^>>path:#sdfootnote2sym||name="sdfootnote2anc"]](%%)^^|agencySchemeAgencyId:**AGENCIES**(**1.0**).agencyId|ECB:**AGENCIES**(**1.0**).AA
	613	+|Agency^^[[^^2^^>>path:#sdfootnote2sym||name="sdfootnote2anc"]]^^|agencySchemeAgencyId:**AGENCIES**(**1.0**).agencyId|ECB:**AGENCIES**(**1.0**).AA
614	614	|//AgencyScheme//|agencySchemeAgencyId:**AGENCIES**(**1.0**)|ECB:**AGENCIES**(**1.0**)
615	615	|//Categorisation//|categorisationAgencyId:categorisationId(version)|IMF:cat001(1.0.0)
616	616	|Category|categorySchemeAgencyId:categorySchemeId(versi on).categoryId.categoryId.categoryId etc.|IMF:SDDS(1.0.0):level_1_category.level_2_category …
...	...	@@ -769,22 +769,22 @@
769	769	The following table lists the Maintainable Artefacts.
770	770
771	771	|(% colspan="2" %)**Maintainable Artefacts**|**Content**
772		-|**Abstract Class**|**Concrete Class**|
	772	+|**Abstract Class**|**Concrete Class**|
773	773	|Item Scheme|Codelist|Code
774		-| |Concept Scheme|Concept
775		-| |Category Scheme|Category
776		-| |Organisation Unit Scheme|Organisation Unit
777		-| |Agency Scheme|Agency
778		-| |Data Provider Scheme|Data Provider
779		-| |Metadata Provider Scheme|Metadata Provider
780		-| |Data Consumer Scheme|Data Consumer
781		-| |Reporting Taxonomy|Reporting Category
782		-| |Transformation Scheme|Transformation
783		-| |Custom Type Scheme|Custom Type
784		-| |Name Personalisation Scheme|Name Personalisation
785		-| |Vtl Mapping Scheme|Vtl Codelist Mapping Vtl Concept Mapping
786		-| |Ruleset Scheme|Ruleset
787		-| |User Defined Operator Scheme|User Defined Operator
	774	+||Concept Scheme|Concept
	775	+||Category Scheme|Category
	776	+||Organisation Unit Scheme|Organisation Unit
	777	+||Agency Scheme|Agency
	778	+||Data Provider Scheme|Data Provider
	779	+||Metadata Provider Scheme|Metadata Provider
	780	+||Data Consumer Scheme|Data Consumer
	781	+||Reporting Taxonomy|Reporting Category
	782	+||Transformation Scheme|Transformation
	783	+||Custom Type Scheme|Custom Type
	784	+||Name Personalisation Scheme|Name Personalisation
	785	+||Vtl Mapping Scheme|Vtl Codelist Mapping Vtl Concept Mapping
	786	+||Ruleset Scheme|Ruleset
	787	+||User Defined Operator Scheme|User Defined Operator
788	788	|Enumerated List|ValueList|Value Item
789	789	|Structure|Data Structure Definition|(((
790	790	Dimension Descriptor
...	...	@@ -803,9 +803,9 @@
803	803
804	804	Measure
805	805	)))
806		-| |Metadata Structure Definition|Metadata Attribute Descriptor Metadata Attribute
807		-|Structure Usage|Dataflow|
808		-| |Metadataflow|
	806	+||Metadata Structure Definition|Metadata Attribute Descriptor Metadata Attribute
	807	+|Structure Usage|Dataflow|
	808	+||Metadataflow|
809	809	|None|Process|Process Step
810	810	|None|Structure Map|(((
811	811	Component Map
...	...	@@ -816,16 +816,16 @@
816	816	)))
817	817	|None|Representation Map|Representation Mapping
818	818	|Item Scheme Map|Organisation Scheme Map|Item Map
819		-| |Concept Scheme Map|Item Map
820		-| |Category Scheme Map|Item Map
821		-| |Reporting Taxonomy Map|Item Map
822		-|None|Provision Agreement|
823		-|None|Metadata Provision Agreement|
	819	+||Concept Scheme Map|Item Map
	820	+||Category Scheme Map|Item Map
	821	+||Reporting Taxonomy Map|Item Map
	822	+|None|Provision Agreement|
	823	+|None|Metadata Provision Agreement|
824	824	|None|Hierarchy|Hierarchical Code
825		-|None|Hierarchy Association|
826		-|None|Categorisation|
	825	+|None|Hierarchy Association|
	826	+|None|Categorisation|
827	827	|Constraint|Data Constraint|DataKeySet
828		-| | |CubeRegion
	828	+|||CubeRegion
829	829	|Constraint|Metadata Constraint|MetadataTargetRegion
830	830
831	831	**Table 4: Table of Maintainable Artefacts for Structural Definition Metadata**
...	...	@@ -835,7 +835,7 @@
835	835	The artefacts included in the structural definitions are:
836	836
837	837	* All types of Item Scheme (Codelist, Concept Scheme, Category Scheme, Organisation Scheme, Agency Scheme, Data Provider Scheme, Metadata Provider Scheme, Data Consumer Scheme, Organisation Unit Scheme, Transformation Scheme, Name Personalisation Scheme, Custom Type Scheme, Vtl Mapping Scheme, Ruleset Scheme, User Defined Operator Scheme)
838		-* All types of Enumerated List (ValueList)^^[[(% class="wikiinternallink wikiinternallink" %)^^3^^>>path:#sdfootnote3sym||name="sdfootnote3anc"]](%%)^^
	838	+* All types of Enumerated List (ValueList)^^[[^^3^^>>path:#sdfootnote3sym||name="sdfootnote3anc"]]^^
839	839	* All types of Structure (Data Structure Definition, Metadata Structure Definition)
840	840	* All types of Structure Usage (Dataflow, Metadataflow)
841	841
...	...	@@ -971,7 +971,7 @@
971	971
972	972	The Registration has an action attribute which takes one of the following values:
973	973
974		-:
	974	+:
975	975
976	976	(((
977	977	|**Action Attribute Value**|**Behaviour**
...	...	@@ -996,7 +996,7 @@
996	996
997	997	https:~/~/github.com/sdmx-twg/sdmx-rest/blob/master/doc/availability.md
998	998
999		-:
	999	+:
1000	1000
1001	1001	(((
1002	1002	|**Indexing Required**|**Registration Process Activity**
...	...	@@ -1019,7 +1019,7 @@
1019	1019	Components of the Constraints model in the
1020	1020	)))
1021	1021	|**Indexing Required**|**Registration Process Activity**
1022		-| |SDMX-IM. Note that the content is not stored in the Selection Value.
	1022	+||SDMX-IM. Note that the content is not stored in the Selection Value.
1023	1023	)))
1024	1024
1025	1025	Constraints that specify the contents of a //QueryDatasource// are submitted to the Registry via the structure submission service (i.e., the RESTful API).
...	...	@@ -1062,7 +1062,7 @@
1062	1062	1. A selector which specifies which type of events are of interest. The set of event types is:
1063	1063
1064	1064	:
1065		-::
	1065	+::
1066	1066
1067	1067	(((
1068	1068	|**Event Type**|**Comment**
...	...	@@ -1136,7 +1136,7 @@
1136	1136
1137	1137	Whenever a dataset or metadata-set is registered a registration event is created. A subscription may be observing all data or metadata registrations, or it may focus on specific registrations as shown in the table below:
1138	1138
1139		-:
	1139	+:
1140	1140
1141	1141	(((
1142	1142	|**Selector**|**Comment**

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