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Last modified by Helena K. on 2026/06/08 15:16
From version 25.12
edited by Helena K.
on 2026/06/03 13:34
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To version 25.10
edited by Helena K.
on 2026/06/03 13:30
Change comment: There is no comment for this version

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142 142  * Addition of [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] Constraint property to a [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]]
143 143  * Addition of evolving structure property to a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]
144 144  * Remove version property on [[Categorisation>>doc:sdmx:Glossary 2\.1.Categorisation.WebHome]]
145 -* Simplification of [[Constraints>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]]
145 +* Simplification of Constraints
146 146  ** Removal of Advanced [[Release Calendar>>doc:sdmx:Glossary 2\.1.Release policy - release calendar.WebHome]]
147 -** Removal of Role, Data [[Constraints>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]] only restrict data that can be reported
148 -** Restrict [[constraint>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]] targets to Identifiable structures (not URLs)
149 -** Addition of Availability [[Constraint>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]] to define actual data
147 +** Removal of Role, Data Constraints only restrict data that can be reported
148 +** Restrict constraint targets to Identifiable structures (not URLs)
149 +** Addition of Availability Constraint to define actual data
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151 151  (% class="wikigeneratedid" id="HDocumentation" %)
152 152  **Documentation**
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237 237  * //**Organisation Scheme:**// Organisations and organisation structure can be defined in an Organisation Scheme. Specific Organisation Schemes exist for [[Maintenance Agency>>doc:sdmx:Glossary 2\.1.Maintenance agency.WebHome]], [[Data Provider>>doc:sdmx:Glossary 2\.1.Data provider.WebHome]], Metadata Provider, [[Data Consumer>>doc:sdmx:Glossary 2\.1.Data consumer.WebHome]], and Organisation [[Unit>>doc:sdmx:Glossary 2\.1.Statistical unit.WebHome]].
238 238  * //**[[Category Scheme>>doc:sdmx:Glossary 2\.1.Category scheme.WebHome]] and [[Categorisation>>doc:sdmx:Glossary 2\.1.Categorisation.WebHome]]:**// [[Category schemes>>doc:sdmx:Glossary 2\.1.Category scheme.WebHome]] are made up of a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of [[categories>>doc:sdmx:Glossary 2\.1.Category.WebHome]], which in [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] may include any type of useful [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] for the organization of data and metadata. A [[Categorisation>>doc:sdmx:Glossary 2\.1.Categorisation.WebHome]] links a [[category>>doc:sdmx:Glossary 2\.1.Category.WebHome]] to an identifiable object. In this way sets of objects can be categorised. A statistical subjectmatter domain scheme is implemented in [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] as a [[Category Scheme>>doc:sdmx:Glossary 2\.1.Category scheme.WebHome]].
239 239  * //**[[Concept Scheme>>doc:sdmx:Glossary 2\.1.Concept scheme.WebHome]]:**// A [[concept scheme>>doc:sdmx:Glossary 2\.1.Concept scheme.WebHome]] is a maintained list of (% style="color:#e74c3c" %)concepts(%%) that are used in [[data structure definitions>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] and [[metadata structure definitions>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]. There can be many such [[concept schemes>>doc:sdmx:Glossary 2\.1.Concept scheme.WebHome]]. A “core” [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] of the (% style="color:#e74c3c" %)concept(%%) can be specified (e.g. a core [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] list, or other [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] such as “date”). Note that this core [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] can be overridden in the [[data structure definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] or [[metadata structure definition>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]] that uses the (% style="color:#e74c3c" %)concept(%%). Indeed, organisations wishing to remain with (% style="color:#e74c3c" %)version(%%) 1.0 key family schema specifications will continue to declare the [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] in the key family definition.
240 +*
240 240  * //**[[Metadata Set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]]:**// A [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] set is a set of information pertaining to an object within the formal [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] view of statistical exchange: they may describe the maintainers of data or structural definitions; they may describe the schedule on which data is released; they may describe the flow of a single type of data over time; they may describe the quality of data, etc. In [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]], the creators of [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] may take whatever (% style="color:#e74c3c" %)concepts(%%) they are concerned with, or obliged to report, and provide a [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] set containing that information.
241 241  * //**[[Metadata Structure Definition>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]:**// A [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] set also has a set of [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] which describes how it is organized. This [[metadata set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]] identifies what [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] (% style="color:#e74c3c" %)concepts(%%) are being reported, how these (% style="color:#e74c3c" %)concepts(%%) relate to each other (typically as [[hierarchies>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]]), what their presentational structure is, how they may be represented (as free text, as coded values, etc.), and with which formal [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] object types they are associated.
242 -* //**[[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] Definition:**// In [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]], [[data sets>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] are reported or disseminated according to a [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition. The [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition identifies the [[data structure definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] and may be associated with one or more subject matter domains via a [[Categorisation>>doc:sdmx:Glossary 2\.1.Categorisation.WebHome]] (this facilitates the search for data according to organised [[category schemes>>doc:sdmx:Glossary 2\.1.Category scheme.WebHome]]). [[Constraints>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]], in terms of reporting [[periodicity>>doc:sdmx:Glossary 2\.1.Frequency of observation.WebHome]] or sub set of possible keys that are allowed in a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]], may be attached to the [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition.
243 +* //**[[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] Definition:**// In [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]], [[data sets>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] are reported or disseminated according to a [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition. The [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition identifies the [[data structure definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] and may be associated with one or more subject matter domains via a [[Categorisation>>doc:sdmx:Glossary 2\.1.Categorisation.WebHome]] (this facilitates the search for data according to organised [[category schemes>>doc:sdmx:Glossary 2\.1.Category scheme.WebHome]]). (% style="color:#e74c3c" %)Constraints(%%), in terms of reporting [[periodicity>>doc:sdmx:Glossary 2\.1.Frequency of observation.WebHome]] or sub set of possible keys that are allowed in a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]], may be attached to the [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition.
243 243  * //**[[Metadataflow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]] Definition:**// A [[metadata flow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]] definition is very similar to a [[data flow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] definition, but describes, categorises, and constrains [[metadata sets>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]].
244 244  * //**[[Data Provider>>doc:sdmx:Glossary 2\.1.Data provider.WebHome]]: **//An organization which produces data is termed a [[data provider>>doc:sdmx:Glossary 2\.1.Data provider.WebHome]].
245 245  * //**Metadata Provider: **//An organization which produces [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] is termed a metadata provider.
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295 295  
296 296  [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] recognizes that statistical data is structured; in [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] this structure is termed a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]. “[[Data sets>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]” are made up of one or more lower-(% style="color:#e74c3c" %)level(%%) “groups”, based on their degrees of similarity. Each group is in turn comprised of one or more “[[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]]” of data. Each [[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]] or section has a “key” - values for each of a cluster of (% style="color:#e74c3c" %)concepts(%%), also called "[[dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]]" - which identifies it, and one or more “observations”, which typically combine the time of the observation, and the value of the observation (e.g., measurement). Additionally, metadata may be attached at any (% style="color:#e74c3c" %)level(%%) of this structure as descriptive “[[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]”. [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] lists (enumerations) and other patterns for [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] of data and metadata are also modelled.
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298 -There is some similarity between “cube” structures commonly used to process statistical data, and the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] idea in the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]]. It is important to note that the data as structured according to the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]] is optimized for exchange, potentially with partners who may have no ability to process a “cube” of data coming from complex statistical systems. [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] [[time series>>doc:sdmx:Glossary 2\.1.Series.WebHome]] can be understood as “slices” of the cube. Such a slice is identified by its key. A "[[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]]" key consists of the values for all [[dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] specified by the key family except time. Thus, it is possible to reconstruct and describe data cubes from [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-structured data, and to exchange such databases using the interfaces and formats provided for that purpose in the standard. Additional objects such as [[hierarchical code>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] lists, [[constraints>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]] and structure (% style="color:#e74c3c" %)maps(%%) make it possible to more fully model the structure of cubes.
299 +There is some similarity between “cube” structures commonly used to process statistical data, and the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] idea in the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]]. It is important to note that the data as structured according to the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]] is optimized for exchange, potentially with partners who may have no ability to process a “cube” of data coming from complex statistical systems. [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] [[time series>>doc:sdmx:Glossary 2\.1.Series.WebHome]] can be understood as “slices” of the cube. Such a slice is identified by its key. A "[[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]]" key consists of the values for all [[dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] specified by the key family except time. Thus, it is possible to reconstruct and describe data cubes from [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]]-structured data, and to exchange such databases using the interfaces and formats provided for that purpose in the standard. Additional objects such as [[hierarchical code>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] lists, (% style="color:#e74c3c" %)constraints(%%) and structure (% style="color:#e74c3c" %)maps(%%) make it possible to more fully model the structure of cubes.
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300 300  The information model also provides a view of [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]]: a mechanism for referencing the meaningful “objects” within the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] view of statistical exchange processes ([[data providers>>doc:sdmx:Glossary 2\.1.Data provider.WebHome]], structures, [[provisioning agreements>>doc:sdmx:Glossary 2\.1.Provision agreement.WebHome]], [[dataflows>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]], [[metadata flows>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]], etc.) to which metadata is attached; a mechanism for describing a set of meaningful (% style="color:#e74c3c" %)concepts(%%), of organizing them into a presentational structure, and of indicating how their values are represented. This is based on a simple, hierarchical view of [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] which is common to many metadata systems and [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]]/categorization schemes. [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] provides a model (and XML and JSON formats) for both describing [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] structures, and of reporting [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] according to those structures.
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