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Changes for page 13 Structure Mapping

Last modified by Helena on 2025/09/10 11:19
From version 19.1
edited by Artur
on 2025/05/22 14:46
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To version 13.4
edited by Helena
on 2025/05/17 00:46
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Summary

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1 -Methodology.SDMX 3\.0 Standards\. Section 6\. Technical notes.WebHome
Author
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1 -xwiki:XWiki.arturkryazhev
1 +xwiki:XWiki.helena
Tags
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1 -Adjustment|Age|Attribute|Code|Component|Data set|Data structure definition|Dimension|Observation value|Representation|Series key|Statistical data and metadata exchange|Time format|Time period|Validation and transformation language
Content
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8 8  
9 9  Structure mapping does not alter the [[observation values>>doc:xwiki:Glossary.Observation value.WebHome]] and is not intended to perform any aggregations or calculations.
10 10  
11 -An input series (% style="color:#e74c3c" %)maps(%%) to:
11 +An input series (% style="color:#2ecc71" %)maps(%%) to:
12 12  
13 13  1. Exactly one output series; or
14 14  1. Multiple output series with different [[Series Keys>>doc:xwiki:Glossary.Series key.WebHome]], but the same [[observation values>>doc:xwiki:Glossary.Observation value.WebHome]]; or
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25 25  
26 26  1-1 (pronounced 'one to one') mappings support the simple use case where the value of a [[Component>>doc:xwiki:Glossary.Component.WebHome]] in the source structure is translated to a different value in the target, usually where different classification schemes are used for the same Concept.
27 27  
28 -In the example below, ISO 2-character country [[codes>>doc:xwiki:Glossary.Code.WebHome]] are (% style="color:#e74c3c" %)mapped(%%) to their ISO 3character equivalent.
28 +In the example below, ISO 2-character country [[codes>>doc:xwiki:Glossary.Code.WebHome]] are (% style="color:#2ecc71" %)mapped(%%) to their ISO 3character equivalent.
29 29  
30 30  (% style="width:666.294px" %)
31 31  |(% style="width:217px" %)**Country**|(% style="width:251px" %)**Alpha-2 code**|(% style="width:195px" %)**Alpha-3 code**
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36 36  |(% style="width:217px" %)Andorra|(% style="width:251px" %)AD|(% style="width:195px" %)AND
37 37  |(% style="width:217px" %)etc…|(% style="width:251px" %) |(% style="width:195px" %)
38 38  
39 -Different source values can also (% style="color:#e74c3c" %)map(%%) to the same target value, for example when deriving regions from country [[codes>>doc:xwiki:Glossary.Code.WebHome]].
39 +Different source values can also (% style="color:#2ecc71" %)map(%%) to the same target value, for example when deriving regions from country [[codes>>doc:xwiki:Glossary.Code.WebHome]].
40 40  
41 41  (% style="width:674.294px" %)
42 42  |(% style="width:284px" %)**Source Component:
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50 50  
51 51  == 13.3 N-n structure maps ==
52 52  
53 -N-n (pronounced 'N to N') mappings describe rules where a specified combination of values in multiple source [[Components>>doc:xwiki:Glossary.Component.WebHome]] (% style="color:#e74c3c" %)map(%%) to specified values in one or more target [[Components>>doc:xwiki:Glossary.Component.WebHome]]. For example, when mapping a partial [[Series Key>>doc:xwiki:Glossary.Series key.WebHome]] from a highly multidimensional cube (like Balance of Payments) to a single 'Indicator' [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] in a target Data Structure.
53 +N-n (pronounced 'N to N') mappings describe rules where a specified combination of values in multiple source [[Components>>doc:xwiki:Glossary.Component.WebHome]] (% style="color:#2ecc71" %)map(%%) to specified values in one or more target [[Components>>doc:xwiki:Glossary.Component.WebHome]]. For example, when mapping a partial [[Series Key>>doc:xwiki:Glossary.Series key.WebHome]] from a highly multidimensional cube (like Balance of Payments) to a single 'Indicator' [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] in a target Data Structure.
54 54  
55 55  Example:
56 56  
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95 95  
96 96  == 13.4 Ambiguous mapping rules ==
97 97  
98 -A structure (% style="color:#e74c3c" %)map(%%) is ambiguous if the rules result in a [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] containing multiple series with the same Series Key.
98 +A structure (% style="color:#2ecc71" %)map(%%) is ambiguous if the rules result in a [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] containing multiple series with the same Series Key.
99 99  
100 -A simple example (% style="color:#e74c3c" %)mapping(%%) a source [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] with a single [[dimension>>doc:xwiki:Glossary.Dimension.WebHome]] to one with multiple [[dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] is shown below:
100 +A simple example (% style="color:#2ecc71" %)mapping(%%) a source [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] with a single [[dimension>>doc:xwiki:Glossary.Dimension.WebHome]] to one with multiple [[dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] is shown below:
101 101  
102 102  (% style="width:819.294px" %)
103 103  |(% style="width:240px" %)**Source**|(% style="width:246px" %)**Target**|(% style="width:329px" %)**Output Series Key**
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124 124  
125 125  == 13.5 Representation maps ==
126 126  
127 -[[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Maps(%%) replace the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 Codelist (% style="color:#e74c3c" %)Maps(%%) and are used describe explicit mappings between source and target [[Component>>doc:xwiki:Glossary.Component.WebHome]] values.
127 +[[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Maps(%%) replace the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 Codelist (% style="color:#2ecc71" %)Maps(%%) and are used describe explicit mappings between source and target [[Component>>doc:xwiki:Glossary.Component.WebHome]] values.
128 128  
129 -The source and target of a [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Map(%%) can reference any of the following:
129 +The source and target of a [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map(%%) can reference any of the following:
130 130  
131 131  1. Codelist
132 132  1. Free Text (restricted by type, e.g String, Integer, Boolean)
133 133  1. Valuelist
134 134  
135 -A [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Map(%%) mapping ISO 2-character to ISO 3-character Codelists would take the following form:
135 +A [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map(%%) mapping ISO 2-character to ISO 3-character Codelists would take the following form:
136 136  
137 137  (% style="width:763.294px" %)
138 138  |(% style="width:252px" %)**CL_ISO_ALPHA2**|(% style="width:508px" %)**CL_ISO_ALPHA3**
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143 143  |(% style="width:252px" %)AD|(% style="width:508px" %)AND
144 144  |(% style="width:252px" %)etc…|(% style="width:508px" %)
145 145  
146 -A [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Map(%%) mapping free text country names to an ISO 2-character Codelist could be similarly described:
146 +A [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map(%%) mapping free text country names to an ISO 2-character Codelist could be similarly described:
147 147  
148 148  (% style="width:770.294px" %)
149 149  |(% style="width:247px" %)**Text**|(% style="width:520px" %)**CL_ISO_ALPHA2**
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157 157  
158 158  Valuelists, introduced in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 3.0, are equivalent to Codelists but allow the maintenance of non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers. Importantly, their IDs do not need to conform to IDType, but as a consequence are not Identifiable.
159 159  
160 -When used in [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Maps(%%), Valuelists allow Non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers containing characters like £, $, % to be (% style="color:#e74c3c" %)mapped(%%) to [[Code>>doc:xwiki:Glossary.Code.WebHome]] IDs, or [[Codes>>doc:xwiki:Glossary.Code.WebHome]] (% style="color:#e74c3c" %)mapped(%%) to non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers.
160 +When used in [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Maps(%%), Valuelists allow Non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers containing characters like £, $, % to be (% style="color:#2ecc71" %)mapped(%%) to [[Code>>doc:xwiki:Glossary.Code.WebHome]] IDs, or [[Codes>>doc:xwiki:Glossary.Code.WebHome]] (% style="color:#2ecc71" %)mapped(%%) to non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] identifiers.
161 161  
162 162  In common with Codelists, each item in a Valuelist has a multilingual name giving it a human-readable label and an optional description. For example:
163 163  
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167 167  |(% style="width:126px" %)%|(% style="width:153px" %)En|(% style="width:498px" %)Percentage
168 168  |(% style="width:126px" %) |(% style="width:153px" %)fr|(% style="width:498px" %)Pourcentage
169 169  
170 -Other characteristics of [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Maps(%%):
170 +Other characteristics of [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Maps(%%):
171 171  
172 -* Support the (% style="color:#e74c3c" %)mapping(%%) of multiple source [[Component>>doc:xwiki:Glossary.Component.WebHome]] values to multiple Target [[Component>>doc:xwiki:Glossary.Component.WebHome]] values as described in section 13.3 on n-to-n mappings; this covers also the case of (% style="color:#e74c3c" %)mapping(%%) an [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] with an array [[representation>>doc:xwiki:Glossary.Representation.WebHome]] to (% style="color:#e74c3c" %)map(%%) combinations of values to a single target value;
173 -* Allow source or target mappings for an Item to be optional allowing rules such as 'A (% style="color:#e74c3c" %)maps(%%) to nothing' or 'nothing (% style="color:#e74c3c" %)maps(%%) to A'; and
174 -* Support for (% style="color:#e74c3c" %)mapping(%%) rules where regular expressions or substrings are used to match source [[Component>>doc:xwiki:Glossary.Component.WebHome]] values. Refer to section 13.6 for more on this topic.
172 +* Support the (% style="color:#2ecc71" %)mapping(%%) of multiple source [[Component>>doc:xwiki:Glossary.Component.WebHome]] values to multiple Target [[Component>>doc:xwiki:Glossary.Component.WebHome]] values as described in section 13.3 on n-to-n mappings; this covers also the case of (% style="color:#2ecc71" %)mapping(%%) an [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] with an array [[representation>>doc:xwiki:Glossary.Representation.WebHome]] to (% style="color:#2ecc71" %)map(%%) combinations of values to a single target value;
173 +* Allow source or target mappings for an Item to be optional allowing rules such as 'A (% style="color:#2ecc71" %)maps(%%) to nothing' or 'nothing (% style="color:#2ecc71" %)maps(%%) to A'; and
174 +* Support for (% style="color:#2ecc71" %)mapping(%%) rules where regular expressions or substrings are used to match source [[Component>>doc:xwiki:Glossary.Component.WebHome]] values. Refer to section 13.6 for more on this topic.
175 175  
176 176  == 13.6 Regular expression and substring rules ==
177 177  
178 178  It is common for classifications to contain meanings within the identifier, for example the [[code>>doc:xwiki:Glossary.Code.WebHome]] Id 'XULADS' may refer to a particular seasonality because it starts with the letters XU.
179 179  
180 -With [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 each [[code>>doc:xwiki:Glossary.Code.WebHome]] that starts with XU had to be individually (% style="color:#e74c3c" %)mapped(%%) to the same seasonality, and additional mappings added when new [[Codes>>doc:xwiki:Glossary.Code.WebHome]] were added to the Codelists. This led to many hundreds or thousands of mappings which can be more efficiently summarised in a single conceptual rule:
180 +With [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 2.1 each [[code>>doc:xwiki:Glossary.Code.WebHome]] that starts with XU had to be individually (% style="color:#2ecc71" %)mapped(%%) to the same seasonality, and additional mappings added when new [[Codes>>doc:xwiki:Glossary.Code.WebHome]] were added to the Codelists. This led to many hundreds or thousands of mappings which can be more efficiently summarised in a single conceptual rule:
181 181  
182 -//If starts with 'XU' (% style="color:#e74c3c" %)map(%%) to 'Y'//
182 +//If starts with 'XU' (% style="color:#2ecc71" %)map(%%) to 'Y'//
183 183  
184 184  These rules are described using either regular expressions, or substrings for simpler use cases.
185 185  
186 186  === 13.6.1 Regular expressions ===
187 187  
188 -Regular expression (% style="color:#e74c3c" %)mapping(%%) rules are defined in the [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#e74c3c" %)Map(%%).
188 +Regular expression (% style="color:#2ecc71" %)mapping(%%) rules are defined in the [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] (% style="color:#2ecc71" %)Map(%%).
189 189  
190 190  Below is an example set of regular expression rules for a particular [[component>>doc:xwiki:Glossary.Component.WebHome]].
191 191  
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230 230  |(% style="width:191px" %)ABC_DEF_XYZ|(% style="width:154px" %)5|(% style="width:211px" %)3|(% style="width:182px" %)DEF
231 231  |(% style="width:191px" %)XULADS|(% style="width:154px" %)1|(% style="width:211px" %)2|(% style="width:182px" %)XU
232 232  
233 -Sub-strings can therefore be used for the conceptual rule //If starts with 'XU' (% style="color:#e74c3c" %)map(%%) to Y// as shown in the following example:
233 +Sub-strings can therefore be used for the conceptual rule //If starts with 'XU' (% style="color:#2ecc71" %)map(%%) to Y// as shown in the following example:
234 234  
235 235  (% style="width:740.294px" %)
236 236  |(% style="width:194px" %)**Start**|(% style="width:151px" %)**Length**|(% style="width:208px" %)**Source**|(% style="width:183px" %)**Target**
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238 238  
239 239  == 13.7 Mapping non-SDMX time formats to SDMX formats ==
240 240  
241 -Structure mapping allows non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] compliant time values in source [[datasets>>doc:xwiki:Glossary.Data set.WebHome]] to be (% style="color:#e74c3c" %)mapped(%%) to an [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] compliant time format.
241 +Structure mapping allows non-[[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] compliant time values in source [[datasets>>doc:xwiki:Glossary.Data set.WebHome]] to be (% style="color:#2ecc71" %)mapped(%%) to an [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] compliant time format.
242 242  
243 243  Two types of time input are defined:
244 244  
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262 262  There are two important points to note:
263 263  
264 264  1. The output frequency determines the output date format, but the default output can be redefined using a Frequency Format mapping to force explicit rules on how the output [[time period>>doc:xwiki:Glossary.Time period.WebHome]] is formatted.
265 -1. To support the use case of changing frequency the structure (% style="color:#e74c3c" %)map(%%) can optionally provide a start of year [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]], which defines the year start date in MM-DD format. For example: YearStart=04-01.
265 +1. To support the use case of changing frequency the structure (% style="color:#2ecc71" %)map(%%) can optionally provide a start of year [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]], which defines the year start date in MM-DD format. For example: YearStart=04-01.
266 266  
267 267  === 13.7.1 Pattern based dates ===
268 268  
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455 455  
456 456  [[image:1747377208446-496.png]]
457 457  
458 -The bold [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] (% style="color:#e74c3c" %)map(%%) from source to target verbatim. The mapping simply specifies:
458 +The bold [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] (% style="color:#2ecc71" %)map(%%) from source to target verbatim. The mapping simply specifies:
459 459  
460 460  FREQ => FREQ
461 461  REF_AREA=> REF_AREA
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463 463  
464 464  No [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] Mapping is required. The source value simply copies across unmodified.
465 465  
466 -The remaining [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] all (% style="color:#e74c3c" %)map(%%) to the Indicator [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]]. This is an example of many [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] mapping to one [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]]. In this case a [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] Mapping is required, and the mapping first describes the input 'partial key' and how this (% style="color:#e74c3c" %)maps(%%) to the target indicator:
466 +The remaining [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] all (% style="color:#2ecc71" %)map(%%) to the Indicator [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]]. This is an example of many [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] mapping to one [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]]. In this case a [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] Mapping is required, and the mapping first describes the input 'partial key' and how this (% style="color:#2ecc71" %)maps(%%) to the target indicator:
467 467  
468 468  N:S1:S1:B:B5G => IND_ABC
469 469  
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475 475  
476 476  In the case where the incoming data type is not a string and not a [[code>>doc:xwiki:Glossary.Code.WebHome]] identifier i.e. the source [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] is of type Integer and the target is Codelist. This is supported by the RepresentationMap. The RepresentationMap source can reference a Codelist, Valuelist, or be free text, the free text can include regular expressions.
477 477  
478 -The following [[representation>>doc:xwiki:Glossary.Representation.WebHome]] mapping can be used to explicitly (% style="color:#e74c3c" %)map(%%) each [[age>>doc:xwiki:Glossary.Age.WebHome]] to an output [[code>>doc:xwiki:Glossary.Code.WebHome]].
478 +The following [[representation>>doc:xwiki:Glossary.Representation.WebHome]] mapping can be used to explicitly (% style="color:#2ecc71" %)map(%%) each [[age>>doc:xwiki:Glossary.Age.WebHome]] to an output [[code>>doc:xwiki:Glossary.Code.WebHome]].
479 479  
480 480  (((
481 481  (% style="width:669.294px" %)
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528 528  |(% style="width:163px" %)18/07/1981|(% style="width:219px" %)dd/MM/yyyy|(% style="width:198px" %)A|(% style="width:180px" %)1981
529 529  )))
530 530  
531 -When the target frequency is based on another target [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] value, in this example the value of the FREQ [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] in the target [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]].
531 +When the target frequency is based on another target Dimension value, in this example the value of the FREQ Dimension in the target DSD.
532 532  
533 533  (((
534 534  (% style="width:734.294px" %)
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548 548  |(% style="width:165px" %)**Source Value**|(% style="width:133px" %)**Source Mapping**|(% style="width:191px" %)**Target Dimension**|(% style="width:264px" %)**Frequency**|(% style="width:167px" %)**Output**
549 549  |(% style="width:165px" %)1981|(% style="width:133px" %)yyyy|(% style="width:191px" %)D – End of Period|(% style="width:264px" %) |(% style="width:167px" %)1981-12-31
550 550  
551 -When the start of year is April 1^^st^^ the Structure (% style="color:#e74c3c" %)Map(%%) has YearStart=04-01:
551 +When the start of year is April 1^^st^^ the Structure Map has YearStart=04-01:
552 552  
553 553  (% style="width:892.294px" %)
554 554  |(% style="width:165px" %)**Source Value**|(% style="width:133px" %)**Source Mapping**|(% style="width:191px" %)**Target Dimension**|(% style="width:264px" %)**Frequency**|(% style="width:167px" %)**Output**
SUZ.Methodology.Code.MethodologyClass[0]
index
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1 -13