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61 61  
62 62  === 2.1.3 Suitability of available DSDs and code lists ===
63 63  
64 -In case an existing DSD is close to but differs from what is needed, it may: (i) contain irrelevant concepts, (ii) lack some required concepts, (iii) use the concepts in different roles than required, (iv) deviate with respect to some of the code lists, or (v) contain pure dimensions when mixed dimensions would make more sense or vice versa. More complex situations that are combinations of several (or even all) of these five cases may occur as well. For example, an existing DSD could contain unnecessary concepts and lack other concepts at the same time.
64 +In case an existing DSD is close to but differs from what is needed, it may: {{{(i)}}} contain irrelevant concepts, (ii) lack some required concepts, (iii) use the concepts in different roles than required, (iv) deviate with respect to some of the code lists, or (v) contain pure dimensions when mixed dimensions would make more sense or vice versa. More complex situations that are combinations of several (or even all) of these five cases may occur as well. For example, an existing DSD could contain unnecessary concepts and lack other concepts at the same time.
65 65  
66 66  ==== 2.1.3.1 Irrelevant concepts ====
67 67  
... ... @@ -389,19 +389,20 @@
389 389  
390 390  **Table 9. Minimum requirements for DSDs~*~***
391 391  
392 -|(% style="width:205px" %)**Question**|(% style="width:272px" %)**Concept**|(% style="width:178px" %)**COG**|(% style="width:270px" %)**Code list**|(% style="width:690px" %)**Time series Cross-section**
393 -|(% style="width:205px" %)Where?|(% style="width:272px" %)reference area|(% style="width:178px" %)X|(% style="width:270px" %)revision|(% style="width:690px" %)mand. attribute or dimension
394 -|(% style="width:205px" %)What?|(% style="width:272px" %)“indicator”|(% style="width:178px" %)-|(% style="width:270px" %)domain|(% style="width:690px" %)one or multiple dimensions
395 -|(% style="width:205px" %)How?|(% style="width:272px" %)unit of measure|(% style="width:178px" %)X|(% style="width:270px" %)development|(% style="width:690px" %)mand. attribute or dimension
396 -|(% style="width:205px" %)How?|(% style="width:272px" %)unit multiplier|(% style="width:178px" %)X|(% style="width:270px" %)available|(% style="width:690px" %)mandatory attribute
397 -|(% style="width:205px" %)How?|(% style="width:272px" %)decimals|(% style="width:178px" %)X|(% style="width:270px" %)available|(% style="width:690px" %)mandatory attribute
398 -|(% style="width:205px" %)How?|(% style="width:272px" %)//adjustment//|(% style="width:178px" %)X|(% style="width:270px" %)development|(% style="width:690px" %)mand. att. not relevant
399 -|(% style="width:205px" %)When?|(% style="width:272px" %)time period|(% style="width:178px" %)X|(% style="width:270px" %)format|(% style="width:690px" %)dimension mand. att.
400 -|(% style="width:205px" %)When?|(% style="width:272px" %)time format|(% style="width:178px" %)X|(% style="width:270px" %)available|(% style="width:690px" %)mandatory attribute
401 -|(% style="width:205px" %)When?|(% style="width:272px" %)time period – collection|(% style="width:178px" %)X|(% style="width:270px" %)development|(% style="width:690px" %)mand. att. cond. att.
402 -|(% style="width:205px" %)When?|(% style="width:272px" %)data update – last update|(% style="width:178px" %)X|(% style="width:270px" %)time stamp|(% style="width:690px" %)mandatory attribute
403 -|(% style="width:205px" %)How often?|(% style="width:272px" %)//frequency//|(% style="width:178px" %)X|(% style="width:270px" %)available|(% style="width:690px" %)mand. att. or not relevant
404 -|(% colspan="2" style="width:477px" %)How much? observation value|(% style="width:178px" %)-|(% style="width:270px" %)numeric|(% style="width:690px" %)dimension measure
392 +(% style="width:1308.83px" %)
393 +|(% style="width:205px" %)**Question**|(% style="width:272px" %)**Concept**|(% style="width:178px" %)**COG**|(% style="width:270px" %)**Code list**|(% style="width:290px" %)**Time series**|(% style="width:221px" %)**Cross-section**
394 +|(% style="width:205px" %)Where?|(% style="width:272px" %)reference area|(% style="width:178px" %)X|(% style="width:270px" %)revision|(% colspan="2" rowspan="1" style="width:478px" %)mand. attribute or dimension
395 +|(% style="width:205px" %)What?|(% style="width:272px" %)“indicator”|(% style="width:178px" %)-|(% style="width:270px" %)domain|(% colspan="2" rowspan="1" style="width:478px" %)one or multiple dimensions
396 +|(% style="width:205px" %)How?|(% style="width:272px" %)unit of measure|(% style="width:178px" %)X|(% style="width:270px" %)development|(% colspan="2" rowspan="1" style="width:478px" %)mand. attribute or dimension
397 +|(% style="width:205px" %)How?|(% style="width:272px" %)unit multiplier|(% style="width:178px" %)X|(% style="width:270px" %)available|(% colspan="2" rowspan="1" style="width:478px" %)mandatory attribute
398 +|(% style="width:205px" %)How?|(% style="width:272px" %)decimals|(% style="width:178px" %)X|(% style="width:270px" %)available|(% colspan="2" rowspan="1" style="width:478px" %)mandatory attribute
399 +|(% style="width:205px" %)How?|(% style="width:272px" %)//adjustment//|(% style="width:178px" %)X|(% style="width:270px" %)development|(% style="width:290px" %)mand. att.|(% style="width:221px" %) not relevant
400 +|(% style="width:205px" %)When?|(% style="width:272px" %)time period|(% style="width:178px" %)X|(% style="width:270px" %)format|(% style="width:290px" %)dimension|(% style="width:221px" %)mand. att.
401 +|(% style="width:205px" %)When?|(% style="width:272px" %)time format|(% style="width:178px" %)X|(% style="width:270px" %)available|(% colspan="2" rowspan="1" style="width:478px" %)mandatory attribute
402 +|(% style="width:205px" %)When?|(% style="width:272px" %)time period – collection|(% style="width:178px" %)X|(% style="width:270px" %)development|(% style="width:290px" %)mand. att.|(% style="width:221px" %)cond. att.
403 +|(% style="width:205px" %)When?|(% style="width:272px" %)data update – last update|(% style="width:178px" %)X|(% style="width:270px" %)time stamp|(% colspan="2" rowspan="1" style="width:478px" %)mandatory attribute
404 +|(% style="width:205px" %)How often?|(% style="width:272px" %)//frequency//|(% style="width:178px" %)X|(% style="width:270px" %)available|(% style="width:290px" %)mand. att. or|(% style="width:221px" %)not relevant
405 +|(% style="width:205px" %)How much?|(% style="width:272px" %)observation value|(% style="width:178px" %)-|(% style="width:270px" %)numeric|(% colspan="2" rowspan="1" style="width:290px" %) measure
405 405  
406 406  ~*~*Concepts in //italics// are only relevant for time series DSDs. An “X” in the COG column means the concept is defined in the COG. Code list “development” means that the SWG will develop a code list to be recommended in the COG; “revision” means that the code list is recommended by the COG and under revision by the SWG; “format” means that a format is defined by another concept; “text”, “time stamp”, and “numeric” provide data types used for uncoded concepts.
407 407  
... ... @@ -411,7 +411,7 @@
411 411  
412 412  |**Question**|**Concept**|**COG**|**Code list**|**TS**|**CS**|**Scenario**
413 413  |Who?|compiling agency|X|development|(((
414 -conditional (sibling)
415 +conditional (sibling)
415 415  )))|conditional (obs. level)|data provider different from data compiler
416 416  |Who?|(((
417 417  confidentiality status – observation
... ... @@ -455,13 +455,15 @@
455 455  
456 456  Figure 1 provides an overview of the overall process. As a first step, the context of the data exchange(s) that should be covered by the DSD(s) is defined in terms of purpose, domains, level of exchange, type of data, type of recipient, role of in data exchange, process pattern, and GSBPM phase (see Figure 2). Since reusing existing artefacts is one of the guiding principles, the second step identifies existing DSDs that may be reused (see Figure 3). In case relevant DSDs are available, their suitability in the present context is evaluated in step 3. Aspects to be taken into account are concept coverage, concept roles, attribute attachment levels, and code lists (see Figure 4). Step 4 is subject to the outcome of step 3. In case of a favorable assessment, the DSDs are simply reused. If the DSDs are partly suitable, modified versions can be derived. See section 2. for a summary of possible DSD modification scenarios. If the DSDs are not suitable or if no relevant DSDs are available at all, new DSDs will be defined as described in section 3. Finally, supporting artefacts such as data flow definitions and data provision agreements are defined (see Figure 5).
457 457  
459 +(% class="wikigeneratedid" %)
460 +[[image:1768470533088-795.png]]
458 458  
459 459  (% class="wikigeneratedid" id="HFigure1.OverviewoftheDSDdesignprocess" %)
460 460  Figure 1. Overview of the DSD design process
461 461  
462 -
463 463  Figure 2 summarizes the characteristics of the data exchange context that is defined in step 1. These characteristics affect the decision on the data structuring approach that is part of the process of defining the concepts of a new DSD (step 4.3. in Figure 1; see Figure 7 in section 2.).
464 464  
467 +[[image:1768470575978-226.png]]
465 465  
466 466  (% class="wikigeneratedid" id="HFigure2.Characteristicsofdataexchangecontext" %)
467 467  Figure 2. Characteristics of data exchange context
... ... @@ -468,20 +468,23 @@
468 468  
469 469  Figure 3 recaps the priorities given to different types of existing DSDs when searching for candidates for reuse in step 2. Global DSDs maintained by the SDMX consortium are ranked the highest. They can be found via the Global SDMX Registry.
470 470  
474 +(% class="wikigeneratedid" %)
475 +[[image:1768470596130-305.png]]
471 471  
472 472  (% class="wikigeneratedid" id="HFigure3.PriorityrankingofexistingDSDsforreuse" %)
473 473  Figure 3. Priority ranking of existing DSDs for reuse
474 474  
475 -
476 476  Figure 4 summarizes the aspects to be considered in the assessment of the suitability of existing DSDs in step 3. For a detailed description of the cases of partial unsuitability see section 2.1. above.
477 477  
482 +(% class="wikigeneratedid" %)
483 +[[image:1768470626558-321.png]]
478 478  
479 479  (% class="wikigeneratedid" id="HFigure4.AspectsofDSDsuitability" %)
480 480  Figure 4. Aspects of DSD suitability
481 481  
482 -
483 483  Figure 5 lists the most relevant artefacts required in addition to a DSD, its concept scheme, and code lists.
484 484  
490 +[[image:1768470646456-652.png]]
485 485  
486 486  Figure 5. Supporting artefacts
487 487  
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489 489  
490 490  Figure 6 briefly recapitulates the actions that can be taken to overcome partial unsuitability of DSDs. As far as possible, existing artefacts should be reused in this case. This means that even if a DSD cannot be reused as a whole, concepts and code lists from that DSD can be included in the new DSD by reference.
491 491  
492 -**Figure 6. DSD modification scenarios**
498 +[[image:1768470678965-391.png]]
493 493  
500 +Figure 6. DSD modification scenarios
501 +
494 494  == 6.3 Defining new DSDs ==
495 495  
496 496  In case no (suitable) DSD is available, the actual process of specifying a new DSD is started. Figure 7 depicts this process (step 4.3. in Figure 1). It encompasses the specification of concepts, code lists, and data formats. All three specification steps include the identification of already existing artefacts that could be reused or modified to satisfy the requirements at hand and the definition of new artefacts in case no suitable artefacts are detected. Several iterations of steps 1 (specification of concepts; see Figure 8) and 2 (specification of code lists; see Figure°13) may be necessary, including revisions of the decision concerning the data structuring approach. Finally all artefacts defined in the previous steps are put together into a DSD.
497 497  
498 -==== Figure 7. New DSD specification process ====
506 +(% class="wikigeneratedid" %)
507 +[[image:1768470705894-724.png]]
499 499  
509 +(% class="wikigeneratedid" id="HFigure7.NewDSDspecificationprocess" %)
510 +Figure 7. New DSD specification process
511 +
500 500  Figure 8 outlines step 4.3.1, the process of concept specification. It covers the decision on the structuring approach, the identification of relevant concepts and the assessment of their suitability, the definition of new concepts, concept roles, and attribute attachment levels.
501 501  
502 -==== Figure 8. Concept specification process ====
514 +(% class="wikigeneratedid" %)
515 +[[image:1768470729899-225.png]]
503 503  
517 +(% class="wikigeneratedid" id="HFigure8.Conceptspecificationprocess" %)
518 +Figure 8. Concept specification process
519 +
504 504  Both, the decision on reuse of existing concepts as well as the definition of new ones, may lead back to a revision of the data structuring approach. For example, it could turn out that a certain concept needs to be broken down further which may lead from a “few composite dimensions” to a “many pure dimensions” approach. Figure 9 provides the design options involved in the decision on a data structuring approach. The options are defined in terms of the number of DSDs and the number of concepts (especially dimensions). The reasonability and feasibility of these options depend on the context of the present data exchange(s) as defined in the first step of the overall design process and on the content of the data exchange with respect to concepts.
505 505  
506 -==== Figure 9. DSD design options ====
522 +(% class="wikigeneratedid" %)
523 +[[image:1768470752201-691.png]]
507 507  
525 +(% class="wikigeneratedid" id="HFigure9.DSDdesignoptions" %)
526 +Figure 9. DSD design options
527 +
508 508  In the second step of new DSD design, relevant existing concepts are identified. Figure 10 indicates potential sources of those concepts such as the SDMX COG for cross-domain concepts, global or other DSDs as already identified earlier in the process, and domain standards such as the UN's System of National Accounts Manual 2008 for domain-specific concepts.
509 509  
510 -==== Figure 10. Potential sources of concepts and definitions ====
530 +(% class="wikigeneratedid" %)
531 +[[image:1768470775109-874.png]]
511 511  
533 +(% class="wikigeneratedid" id="HFigure10.Potentialsourcesofconceptsanddefinitions" %)
534 +Figure 10. Potential sources of concepts and definitions
535 +
512 512  The definition of new concepts (step 4.3.1.4.2.) is necessary if no (suitable) concept can be reused. It entails giving each concept a name, a code, and a definition. Further details about the usage of the concepts in the DSD are specified in steps 4.3.1.5. (concept roles), 4.3.1.6. (dimension groups), and 4.3.1.7. (attribute attachment levels). Figure 11 and 12 summarize the possible concept roles and attribute attachment levels.
513 513  
514 514  The second step in the process of defining a new DSD is the specification of code lists for all coded concepts. All dimensions must be coded (with time being an exception to this rule); attributes may be coded. For uncoded concepts, a data format has to be specified. Existing formats may be reused or new ones defined. An example is the time format that is specified in the SDMX COG. Figure 13 illustrates the code list specification process. If no relevant and suitable code list exists, a new one will be defined or a partially suitable one will be adapted (see Figure 16). Suitable code lists can simply be reused via reference.
515 515  
540 +[[image:1768470796725-270.png]]
516 516  
542 +(% class="wikigeneratedid" %)
543 +Figure 11. Possible concept roles
544 +
545 +(% class="wikigeneratedid" %)
546 +[[image:1768470829131-599.png]]
547 +
548 +(% class="wikigeneratedid" %)
549 +Figure 12. Possible attribute attachment levels
550 +
551 +(% class="wikigeneratedid" %)
552 +[[image:1768470860119-204.png]]
553 +
517 517  (% class="wikigeneratedid" id="HFigure13.Codelistspecificationprocess" %)
518 518  Figure 13. Code list specification process
519 519  
520 -
557 +(% class="wikigeneratedid" %)
521 521  Figure 14 recaps the priorities given to different types of existing code lists when searching for candidates for reuse (step 4.3.2.1.). Code lists recommended by the SDMX COG (and maintained by the SDMX consortium) are ranked the highest.
522 522  
560 +[[image:1768470878394-873.png]]
523 523  
524 524  (% class="wikigeneratedid" id="HFigure14.Priorityrankingofexistingcodelistsforreuse" %)
525 525  Figure 14. Priority ranking of existing code lists for reuse
526 526  
527 -
565 +(% class="wikigeneratedid" %)
528 528  Figure 15 summarizes the aspects to be considered in the evaluation of the suitability of existing code lists (step 4.3.2.2.). Figure 16 summarizes the scenarios of adapting existing code lists that do not fully meet the specified needs (step 4.3.2.3.2). For a detailed description of the cases of partial unsuitability see section 2.1. above.
529 529  
568 +[[image:1768470896763-366.png]]
530 530  
531 531  (% class="wikigeneratedid" id="HFigure15.Aspectsofcodelistsuitability" %)
532 532  Figure 15. Aspects of code list suitability
533 533  
573 +(% class="wikigeneratedid" %)
574 +[[image:1768470911321-123.png]]
534 534  
535 535  (% class="wikigeneratedid" id="HFigure16.Codelistmodificationscenarios" %)
536 536  Figure 16. Code list modification scenarios
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543 543  
544 544  Figure 17 provides an overview of all steps in the DSD design process as described in the previous subsections 1. to 3. Figure 18 compiles those steps into a checklist for DSD designers to help them make sure all aspects are considered.
545 545  
587 +[[image:1768471052577-528.png]]
588 +
546 546  Figure 17. DSD design process
547 547  
591 +[[image:1768470939545-136.png]]
548 548  
549 549  Figure 18. Checklist for DSD design process
550 550  
... ... @@ -594,10 +594,12 @@
594 594  
595 595  == 9.2 Non-SDMX Documents ==
596 596  
597 -6th Edition of the IMF's Balance of Payments Manual (BPM6). Available online at http:~/~/www.imf.org/external/pubs/ft/bop/2007/bopman6.htm.
641 +6th Edition of the IMF's Balance of Payments Manual (BPM6). Available online at [[http:~~/~~/www.imf.org/external/pubs/ft/bop/2007/bopman6.htm>>https://http:www.imf.orgexternalpubsftbop2007bopman6.htm||target="_blank"]].
598 598  
599 -METIS: Generic Statistical Business Process Model (GSBPM). Available online at http:~/~/www1.unece.org/stat/platform/display/metis/The+Generic+Statistical+Business+Process+Model. UN's System of National Accounts Manual 2008 (SNA2008). Available online at http:~/~/unstats.un.org/unsd/nationalaccount/sna2008.asp.
643 +METIS: Generic Statistical Business Process Model (GSBPM). Available online at [[http:~~/~~/www1.unece.org/stat/platform/display/metis/The+Generic+Statistical+Business+Process+Model>>https://http:www1.unece.orgstatplatformdisplaymetisThe+Generic+Statistical+Business+Process+Model||target="_blank"]].
600 600  
645 +UN's System of National Accounts Manual 2008 (SNA2008). Available online at [[http:~~/~~/unstats.un.org/unsd/nationalaccount/sna2008.asp>>https://http:unstats.un.orgunsdnationalaccountsna2008.asp||target="_blank"]].
646 +
601 601  ----
602 602  
603 603  {{putFootnotes/}}
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