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

From version 7.9
edited by Helena
on 2025/05/14 13:38
Change comment: There is no comment for this version
To version 11.1
edited by Helena
on 2025/05/14 14:45
Change comment: There is no comment for this version

Summary

Details

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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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65 65  
66 66  Version 3.0 introduces breaking changes into the web services API, transmission formats and information model. A summary is given in the table below.
67 67  
68 -== //2.1 Web Services API// ==
68 +== 2.1 Web Services API ==
69 69  
70 70  (% style="width:948.039px" %)
71 71  |**REST API**|(% style="width:818px" %)(((
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86 86  )))
87 87  |**SOAP API**|(% style="width:818px" %)The SOAP API has been deprecated.
88 88  
89 -== //2.2 Transmission Formats// ==
89 +== 2.2 Transmission Formats ==
90 90  
91 91  (((
92 92  (% style="width:952.039px" %)
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122 122  |(% 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.
123 123  )))
124 124  
125 -== //2.3 Information Model// ==
125 +== 2.3 Information Model ==
126 126  
127 127  (((
128 128  (% style="width:955.039px" %)
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177 177  
178 178  = 3 Information Model =
179 179  
180 -== //3.1 Version 3.0 Information Model// ==
180 +== 3.1 Version 3.0 Information Model ==
181 181  
182 182  [[image:SDMX 3-0-0 Major Changes FINAL-1.0_en_6fc573fe.png||height="404" width="718"]]
183 183  
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187 187  
188 188  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.
189 189  
190 -== //3.2 Key Changes from Version 2.1// ==
190 +== 3.2 Key Changes from Version 2.1 ==
191 191  
192 192  New Maintainable Artefacts
193 193  
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215 215  Removed Maintainable Artefacts
216 216  
217 217  * Structure Set – replaced by Structure Map and the four item scheme maps
218 -* 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
219 219  
220 220  Changed Maintainable Artefacts
221 221  
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229 229  
230 230  * GeospatialInformation – a string type where the value is an expression defining a set of geographical features using a purpose-designed syntax
231 231  
232 -== //3.3 Areas Unchanged from Version 2.1// ==
233 +== 3.3 Areas Unchanged from Version 2.1 ==
233 233  
234 234  The following areas of the information model are unchanged from version 2.1:
235 235  
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242 242  * Reporting taxonomy
243 243  * Process
244 244  
245 -== //3.4 Reference Metadata// ==
246 +== 3.4 Reference Metadata ==
246 246  
247 247  Reference metadata has been substantially re-designed for version 3.0 to simplify the model and better support practical use cases.
248 248  
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271 271  * SOURCE_AGENCY – a multi-value data attribute
272 272  
273 273  <Obs xsi:type="dsd:ObsType" OBS_VALUE="112" OBS_STAUS=”A” TIME_PERIOD="2010-09">
274 -
275 275  <!—- complex multi-value and multi-lingual data attributes ~-~->
276 -
277 277  <Comp id="TITLE" xsi:type="ns1:TITLE_ATTRIBUTE">
278 -
279 279  <Value>
280 -
281 281  <common:Text xml:lang="en">Some English Text</common:Text>
282 -
283 283  <common:Text xml:lang="fr">Quelques textes en anglais</common:Text>
284 -
285 285  </Value>
286 -
287 287  </Comp>
288 288  
289 289  <Comp id="SOURCE_AGENCY" xsi:type="ns1:SOURCE_AGENCY_ATTRIBUTE">
290 -
291 291  <Value>4F0</Value>
292 -
293 293  <Value>4D0</Value>
294 -
295 295  <Value>CZ2</Value>
296 -
297 297  </Comp>
298 -
299 299  <!—- metadata attributes are reported like in metadata messages ~-~->
300 -
301 301  <Metadata>
302 -
303 303  <Attribute id="COLLECTION">
304 -
305 305  <Attribute id="METHOD">
306 -
307 307  <Text lang="en">AAA</Text>
308 -
309 309  </Attribute>
310 -
311 311  </Attribute>
312 -
313 313  <Attribute id="CONTACT">
314 -
315 315  <Value>CONTACT 1</Value>
316 -
317 317  <Attribute id="NAME">
318 -
319 319  <Value>Contact 1 Name 1</Value>
320 -
321 321  </Attribute>
322 -
323 323  <Attribute id="NAME">
324 -
325 325  <Value>Contact 1 Name 2</Value>
326 -
327 327  </Attribute>
328 -
329 329  </Attribute>
330 -
331 331  <Attribute id="CONTACT">
332 -
333 333  <Value>CONTACT 2</Value>
334 -
335 335  <Attribute id="NAME">
336 -
337 337  <Value>Contact 2 Name 1</Value>
338 -
339 339  </Attribute>
340 -
341 341  <Attribute id="NAME">
342 -
343 343  <Value>Contact 2 Name 2</Value>
344 -
345 345  </Attribute>
346 -
347 347  </Attribute>
348 -
349 349  </Metadata>
350 -
351 351  </Obs>
352 352  
353 353  === New - Metadata Provision Agreement ===
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362 362  
363 363  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.
364 364  
365 -== //3.5 Microdata Exchange// ==
328 +== 3.5 Microdata Exchange ==
366 366  
367 367  Several changes have been made the Data Structure Definition to support microdata use cases in addition to aggregated time series.
368 368  
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375 375  MeasureDimension behaviour as illustrated in the SDMX-ML example below:
376 376  
377 377  <str:MeasureList id=”MeasureDescriptor”>
378 -
379 379  <str:Measure id=”OBS_VALUE” minOccurs=”1” maxOccurs=”1” usage=”mandatory” > <str:ConceptIdentity>
380 -
381 381  <Ref id=”OBS_VALUE” maintainableParentID=”CONCEPTS” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
382 -
383 383  </str:ConceptIdentity>
384 -
385 385  <str:LocalRepresentation>
386 -
387 387  <str:TextFormat textType=”String” isMultiLingual=”true” />
388 -
389 389  </str:LocalRepresentation>
390 -
391 391  <str:ConceptRole>
392 -
393 393  <Ref id=”MEASURE” maintainableParentID=”SDMX_CONCEPT_ROLES” agencyID=”SDMX” maintainableParentVersion=”1.0.0” />
394 -
395 395  </str:ConceptRole>
396 -
397 397  </str:Measure>
398 -
399 399  ...
400 -
401 401  <str:Measure>
402 -
403 403  </str:MeasureList>
404 404  
405 405  === Multi-value measures and attributes ===
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420 420  
421 421  That allows ValueItems (the equivalent to Code) to contain symbols like ‘¥’ and ‘€’, but 208 also means they are not identifiable.
422 422  
423 -== //3.6 Geospatial Data Exchange// ==
373 +== 3.6 Geospatial Data Exchange ==
424 424  
425 425  The version 3.0 model has been extended to provide explicit support for geospatial data.
426 426  
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435 435  * 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.
436 436  * 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.
437 437  
438 -=== //3.7 Structure Mapping// ===
388 +=== 3.7 Structure Mapping ===
439 439  
440 440  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.
441 441  
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467 467  
468 468  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.
469 469  
470 -=== //3.8 Constraints// ===
420 +=== 3.8 Constraints ===
471 471  
472 472  Constraints in version 3.0 are modelled using two separate artefacts which replace the version 2.1 content constraint:
473 473  
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482 482  
483 483  Attachment constraints have been deprecated due to a lack of use cases.
484 484  
485 -=== //3.9 Code List Extension// ===
435 +=== 3.9 Code List Extension ===
486 486  
487 487  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.
488 488  
489 489  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.
490 490  
491 -=== //3.10 Discriminated Union of Code Lists// ===
441 +=== 3.10 Discriminated Union of Code Lists ===
492 492  
493 493  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.
494 494  
495 -=== //3.11 Code Hierarchies// ===
445 +=== 3.11 Code Hierarchies ===
496 496  
497 497  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).
498 498  
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540 540  
541 541  = 5 REST Web Services API =
542 542  
543 -== //5.1 Simplified list of resources// ==
493 +== 5.1 Simplified list of resources ==
544 544  
545 545  The version 3.0 REST API has just five main resources:
546 546  
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554 554  
555 555  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.
556 556  
557 -== //5.2 Improved data queries// ==
507 +== 5.2 Improved data queries ==
558 558  
559 559  Data queries have been changed to provide more granular selections from contexts wider than just a Dataflow.
560 560  
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593 593  
594 594  /data/dataflow/ESTAT/ICP/1.0.0/M…A.ANR,M…A.INX,M…B.CTG
595 595  
596 -== //5.3 Improved reference metadata queries// ==
546 +== 5.3 Improved reference metadata queries ==
597 597  
598 598  Reference metadata queries have been improved with a number of new options to retrieve metadata reports.
599 599  
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609 609  
610 610  /metadata/structure/datastructure/BIS/BIS_CBS/1.0
611 611  
612 -== //5.4 Structural metadata maintenance// ==
562 +== 5.4 Structural metadata maintenance ==
613 613  
614 614  Support has been added for maintenance of structural metadata.
615 615  
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617 617  
618 618  = 6 XML, JSON, CSV and EDI Transmission formats =
619 619  
620 -== //6.1 SDMX-ML// ==
570 +== 6.1 SDMX-ML ==
621 621  
622 622  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.
623 623  
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703 703  
704 704  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.
705 705  
706 -== //6.2 SDMX-JSON// ==
656 +== 6.2 SDMX-JSON ==
707 707  
708 708  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.
709 709  
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723 723  
724 724  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.
725 725  
726 -== //6.3 SDMX-CSV// ==
676 +== 6.3 SDMX-CSV ==
727 727  
728 728  CSV in SDMX is used transmission of data and reference metadata only.
729 729  
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741 741  
742 742  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.
743 743  
744 -=== //6.4 EDI deprecation// ===
694 +=== 6.4 EDI deprecation ===
745 745  
746 746  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.
747 747  
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