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

Last modified by Helena on 2025/09/10 11:19

From 13.4 to 14.1 From 16.3 to 16.4

From version 14.1

edited by Helena
on 2025/05/14 15:10

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To version 16.3

edited by Helena
on 2025/05/16 13:18

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@@ -247,8 +247,8 @@
  Reference metadata has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
--=== Simplify Metadata Structure Definition ===
--
++(% class="wikigeneratedid" id="HSimplifyMetadataStructureDefinition" %)
++**Simplify Metadata Structure Definition**
  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.
  [[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_ad5f5c97.png||height="346" width="494"]]
@@ -259,8 +259,8 @@
  //Figure 3 the simplified version 3.0 MSD//
--=== Change to reference metadata reported against data ===
--
++(% class="wikigeneratedid" id="HChangetoreferencemetadatareportedagainstdata" %)
++**Change to reference metadata reported against data**
  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.
  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.
@@ -312,16 +312,16 @@
  >       </Metadata>
  > </Obs>
--=== New - Metadata Provision Agreement ===
--
++(% class="wikigeneratedid" id="HNew-MetadataProvisionAgreement" %)
++**New - Metadata Provision Agreement**
  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.
--=== Move target to Metadataflow and Metadata Provision Agreement ===
--
++(% class="wikigeneratedid" id="HMovetargettoMetadataflowandMetadataProvisionAgreement" %)
++**Move target to Metadataflow and Metadata Provision Agreement**
  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.
--=== Add maintainable properties to reference metadata ===
--
++(% class="wikigeneratedid" id="HAddmaintainablepropertiestoreferencemetadata" %)
++**Add maintainable properties to reference metadata**
  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.
  == 3.5 Microdata Exchange ==
@@ -328,57 +328,47 @@
  Several changes have been made the Data Structure Definition to support microdata use cases in addition to aggregated time series.
--=== Multiple measures ===
++(% class="wikigeneratedid" id="HMultiplemeasures" %)
++**Multiple measures**
++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:
--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
++> <str:MeasureList id=”MeasureDescriptor”>
++>     <str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
++>         <Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
++>     </str:ConceptIdentity>
++>     <str:LocalRepresentation>
++>         <str:TextFormat textType=”String” isMultiLingual=”true” />
++>     </str:LocalRepresentation>
++>     <str:ConceptRole>
++>         <Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
++>     </str:ConceptRole>
++>  </str:Measure>
++>         ...
++>     <str:Measure>
++> </str:MeasureList>
--Data Structure Definition, and can be either mandatory or conditional. Creating a measure with the “MEASURE” concept role applied emulates the version 2.1
++(% class="wikigeneratedid" id="HMulti-valuemeasuresandattributes" %)
++**Multi-value measures and attributes**
++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.
--MeasureDimension behaviour as illustrated in the SDMX-ML example below:
--
--<str:MeasureList id=”MeasureDescriptor”>
--<str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
--<Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
--</str:ConceptIdentity>
--<str:LocalRepresentation>
--<str:TextFormat textType=”String” isMultiLingual=”true” />
--</str:LocalRepresentation>
--<str:ConceptRole>
--<Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
--</str:ConceptRole>
--</str:Measure>
--...
--<str:Measure>
--</str:MeasureList>
--
--=== Multi-value measures and attributes ===
--
--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.
--
--=== Attributes relationship to measures ===
--
++(% class="wikigeneratedid" id="HAttributesrelationshiptomeasures" %)
++**Attributes relationship to measures**
  In addition to attaching attributes to a specific level within the dataset, their relationship 202 to measures can also be defined.
--=== Value lists ===
++(% class="wikigeneratedid" id="HValuelists" %)
++**Value lists**
++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.
--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 208 also means they are not identifiable.
--
  == 3.6 Geospatial Data Exchange ==
  The version 3.0 model has been extended to provide explicit support for geospatial data.
--=== GeospatialInformation type ===
--
++(% class="wikigeneratedid" id="HGeospatialInformationtype" %)
++**GeospatialInformation type**
  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.
--=== Geospatial code lists ===
--
++(% class="wikigeneratedid" id="HGeospatialcodelists" %)
++**Geospatial code lists**
  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:
  * 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.
@@ -390,8 +390,8 @@
  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.
--=== Many-to-many source and target components ===
--
++(% class="wikigeneratedid" id="HMany-to-manysourceandtargetcomponents" %)
++**Many-to-many source and target components**
  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:
  Set the output component INDICATOR=”DE_A” if the input components are FREQ=”A” and REF_AREA=”DE”.
@@ -401,19 +401,18 @@
  Set the output components FREQ=”A”, REF_AREA=”DE” if the input component INDICATOR=”DE_A”.
  **Fixed source and target**
--
  The Structure Map may now define input or output components which have a fixed value.
--=== Time representations mapping ===
--
++(% class="wikigeneratedid" id="HTimerepresentationsmapping" %)
++**Time representations mapping**
  Non SDMX time representations may now be described in a Structure Map, allowing them to be mapped into SDMX time formats.
--=== Regular expression and substring mappings ===
--
++(% class="wikigeneratedid" id="HRegularexpressionandsubstringmappings" %)
++**Regular expression and substring mappings**
  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.
--=== Item maps validity period ===
--
++(% class="wikigeneratedid" id="HItemmapsvalidityperiod" %)
++**Item maps validity period**
  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.
  == 3.8 Constraints ==
@@ -462,7 +462,6 @@
  Examples:
  SDMX:CL_AREA(1.0.0)
--
  SDMX:CL_AREA(2.3.2)
  == Dependency management ==
@@ -470,7 +470,6 @@
  Additional constructs are possible for dependency management when referencing structures. For instance:
 .3+.1 Means the currently latest available version >= “2.3.1” and < “3.0.0” (all backwards compatible versions >= “2.3.1”).
--
 +.3.1 Means the currently latest available version >= “2.3.1” (even if not backwards compatible).
  == Draft structures ==