Changes for page 13 Structure Mapping
Last modified by Artur on 2025/09/10 11:19
Summary
-
Page properties (1 modified, 0 added, 0 removed)
Details
- Page properties
-
- Content
-
... ... @@ -189,36 +189,37 @@ 189 189 190 190 These rules are described using either regular expressions, or substrings for simpler use cases. 191 191 192 -=== 13. 5.1 Regular expressions ===192 +=== 13.6.1 Regular expressions === 193 193 194 -Regular expression mapping rules are defined in the Representation Map. 194 +Regular expression mapping rules are defined in the [[Representation>>doc:sdmx:Glossary.Representation.WebHome]] Map. 195 195 196 -Below is an example set of regular expression rules for a particular component. 196 +Below is an example set of regular expression rules for a particular [[component>>doc:sdmx:Glossary.Component.WebHome]]. 197 197 198 -|Regex|Description|Output 199 -|A|Rule match if input = 'A'|OUT_A 200 -|^[A-G]|Rule match if the input starts with letters A to G|OUT_B 201 -|A~|B|Rule match if input is either 'A' or 'B'|OUT_C 198 +(% style="width:664.294px" %) 199 +|(% style="width:141px" %)**Regex**|(% style="width:362px" %)**Description**|(% style="width:158px" %)**Output** 200 +|(% style="width:141px" %)A|(% style="width:362px" %)Rule match if input = 'A'|(% style="width:158px" %)OUT_A 201 +|(% style="width:141px" %)^[A-G]|(% style="width:362px" %)Rule match if the input starts with letters A to G|(% style="width:158px" %)OUT_B 202 +|(% style="width:141px" %)A~|B|(% style="width:362px" %)Rule match if input is either 'A' or 'B'|(% style="width:158px" %)OUT_C 202 202 203 -Like all mapping rules, the output is either a Code, a Value or free text depending on the representation of the Component in the target Data Structure Definition. 204 +Like all mapping rules, the output is either a [[Code>>doc:sdmx:Glossary.Code.WebHome]], a Value or free text depending on the [[representation>>doc:sdmx:Glossary.Representation.WebHome]] of the [[Component>>doc:sdmx:Glossary.Component.WebHome]] in the target [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]]. 204 204 205 205 If the regular expression contains capture groups, these can be used in the definition of the output value, by specifying \**//n//**// //as an output value where **//n//** is the number of the capture group starting from 1. For example 206 206 207 -|Regex|Target output|Example Input|Example Output 208 -|((( 209 -([0-9]{4})[0- 208 +(% style="width:700.294px" %) 209 +|(% style="width:203px" %)Regex|(% style="width:148px" %)Target output|(% style="width:157px" %)Example Input|(% style="width:189px" %)Example Output 210 +|(% style="width:203px" %)((( 211 +([0-9]{4})[0-9]([0-9]{1}) 212 +)))|(% style="width:148px" %)\1-Q\2|(% style="width:157px" %)200933|(% style="width:189px" %)2009-Q3 210 210 211 -9]([0-9]{1}) 212 -)))|\1-Q\2|200933|2009-Q3 213 - 214 214 As regular expression rules can be used as a general catch-all if nothing else matches, the ordering of the rules is important. Rules should be tested starting with the highest priority, moving down the list until a match is found. 215 215 216 216 The following example shows this: 217 217 218 -|Priority|Regex|Description|Output 219 -|1|A|Rule match if input = 'A'|OUT_A 220 -|2|B|Rule match if input = 'B'|OUT_B 221 -|3|[A-Z]|Any character A-Z|OUT_C 218 +(% style="width:704.294px" %) 219 +|(% style="width:130px" %)Priority|(% style="width:125px" %)Regex|(% style="width:241px" %)Description|(% style="width:205px" %)Output 220 +|(% style="width:130px" %)1|(% style="width:125px" %)A|(% style="width:241px" %)Rule match if input = 'A'|(% style="width:205px" %)OUT_A 221 +|(% style="width:130px" %)2|(% style="width:125px" %)B|(% style="width:241px" %)Rule match if input = 'B'|(% style="width:205px" %)OUT_B 222 +|(% style="width:130px" %)3|(% style="width:125px" %)[A-Z]|(% style="width:241px" %)Any character A-Z|(% style="width:205px" %)OUT_C 222 222 223 223 The input 'A' matches both the first and the last rule, but the first takes precedence having the higher priority. The output is OUT_A. 224 224 ... ... @@ -230,24 +230,27 @@ 230 230 231 231 For instance: 232 232 233 -|Input String|Start|Length|Output 234 -|ABC_DEF_XYZ|5|3|DEF 235 -|XULADS|1|2|XU 234 +(% style="width:623.294px" %) 235 +|(% style="width:169px" %)Input String|(% style="width:147px" %)Start|(% style="width:133px" %)Length|(% style="width:171px" %)Output 236 +|(% style="width:169px" %)ABC_DEF_XYZ|(% style="width:147px" %)5|(% style="width:133px" %)3|(% style="width:171px" %)DEF 237 +|(% style="width:169px" %)XULADS|(% style="width:147px" %)1|(% style="width:133px" %)2|(% style="width:171px" %)XU 236 236 237 -Sub-strings can therefore be used for the conceptual rule //If starts with 'XU' map to Y// as shown in the following example: 239 +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: 238 238 239 -|Start|Length|Source|Target 240 -|1|2|XU|Y 241 +(% style="width:628.294px" %) 242 +|(% style="width:163px" %)Start|(% style="width:158px" %)Length|(% style="width:128px" %)Source|(% style="width:176px" %)Target 243 +|(% style="width:163px" %)1|(% style="width:158px" %)2|(% style="width:128px" %)XU|(% style="width:176px" %)Y 241 241 242 -== 13. 6Mapping non-SDMX time formats to SDMX formats ==245 +== 13.7 Mapping non-SDMX time formats to SDMX formats == 243 243 244 -Structure mapping allows non-SDMX compliant time values in source datasets to be mapped to an SDMX compliant time format. 247 +Structure mapping allows non-[[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] compliant time values in source [[datasets>>doc:sdmx:Glossary.Data set.WebHome]] to be (% style="color:#e74c3c" %)mapped(%%) to an [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] compliant time format. 245 245 246 246 Two types of time input are defined: 247 247 248 -a. **Pattern based dates** – a string which can be described using a notation like dd/mm/yyyy or is represented as the number of periods since a point in time, for example: 2010M001 (first month in 2010), or 2014D123 (123^^rd^^ day in 2014); and b. **Numerical based datetime** – a number specifying the elapsed periods since a fixed point in time, for example Unix Time is measured by the number of milliseconds since 1970. 251 +a. **Pattern based dates** – a string which can be described using a notation like dd/mm/yyyy or is represented as the number of periods since a point in time, for example: 2010M001 (first month in 2010), or 2014D123 (123^^rd^^ day in 2014); and 252 +b. **Numerical based datetime** – a number specifying the elapsed periods since a fixed point in time, for example Unix Time is measured by the number of milliseconds since 1970. 249 249 250 -The output of a time-based mapping is derived from the output Frequency, which is either explicitly stated in the mapping or defined as the value output by a specific Dimension or Attribute in the output mapping. If the output frequency is unknown or if the SDMX format is not desired, then additional rules can be provided to specify the output date format for the given frequency Id. The default rules are: 254 +The output of a time-based mapping is derived from the output Frequency, which is either explicitly stated in the mapping or defined as the value output by a specific [[Dimension>>doc:sdmx:Glossary.Dimension.WebHome]] or [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] in the output mapping. If the output frequency is unknown or if the [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] format is not desired, then additional rules can be provided to specify the output date format for the given frequency Id. The default rules are: 251 251 252 252 |Frequency|Format|Example 253 253 |A|YYYY|2010 ... ... @@ -267,40 +267,43 @@ 267 267 268 268 There are two important points to note: 269 269 270 -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 is formatted. 271 -1. To support the use case of changing frequency the structure map can optionally provide a start of year attribute, which defines the year start date in MM-DD format. For example: YearStart=04-01. 272 -11. 273 -111. Pattern based dates 274 +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:sdmx:Glossary.Time period.WebHome]] is formatted. 275 +1. To support the use case of changing frequency the structure (% style="color:#e74c3c" %)map(%%) can optionally provide a start of year [[attribute>>doc:sdmx:Glossary.Attribute.WebHome]], which defines the year start date in MM-DD format. For example: YearStart=04-01. 274 274 275 - Dateand time formats are specified by date and time pattern strings based on Java's Simple Date Format.Within date andtimepatternstrings, unquoted letters from 'A' to 'Z' and from 'a' to 'z' are interpreted as pattern letters representing the components of a date or time string. Text canbe quoted using single quotes (') toavoid interpretation. "''" represents a single quote. All other characters are not interpreted;they're simply copiedinto the output string during formatting or matched againstthe input string during parsing.277 +=== 13.7.1 Pattern based dates === 276 276 279 +Date and [[time formats>>doc:sdmx:Glossary.Time format.WebHome]] are specified by date and time pattern strings based on Java's Simple Date Format. Within date and time pattern strings, unquoted letters from 'A' to 'Z' and from 'a' to 'z' are interpreted as pattern letters representing the [[components>>doc:sdmx:Glossary.Component.WebHome]] of a date or time string. Text can be quoted using single quotes (') to avoid interpretation. "''" represents a single quote. All other characters are not interpreted; they're simply copied into the output string during formatting or matched against the input string during parsing. 280 + 277 277 Due to the fact that dates may differ per locale, an optional property, defining the locale of the pattern, is provided. This would assist processing of source dates, according to the given locale{{footnote}} A list of commonly used locales can be found in the Java supported locales: https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html{{/footnote}}. An indicative list of examples is presented in the following table: 278 278 279 -|English (en)|Australia (AU)|en-AU 280 -|English (en)|Canada (CA)|en-CA 281 -|English (en)|United Kingdom (GB)|en-GB 282 -|English (en)|United States (US)|en-US 283 -|Estonian (et)|Estonia (EE)|et-EE 284 -|Finnish (fi)|Finland (FI)|fi-FI 285 -|French (fr)|Belgium (BE)|fr-BE 286 -|French (fr)|Canada (CA)|fr-CA 287 -|French (fr)|France (FR)|fr-FR 288 -|French (fr)|Luxembourg (LU)|fr-LU 289 -|French (fr)|Switzerland (CH)|fr-CH 290 -|German (de)|Austria (AT)|de-AT 291 -|German (de)|Germany (DE)|de-DE 292 -|German (de)|Luxembourg (LU)|de-LU 293 -|German (de)|Switzerland (CH)|de-CH 294 -|Greek (el)|Cyprus (CY)|el-CY[[(*)>>url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]][[url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]] 295 -|Greek (el)|Greece (GR)|el-GR 296 -|Hebrew (iw)|Israel (IL)|iw-IL 297 -|Hindi (hi)|India (IN)|hi-IN 298 -|Hungarian (hu)|Hungary (HU)|hu-HU 299 -|Icelandic (is)|Iceland (IS)|is-IS 300 -|Indonesian (in)|Indonesia (ID)|in-ID[[(*)>>url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]][[url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]] 301 -|Irish (ga)|Ireland (IE)|ga-IE[[(*)>>url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]][[url:https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]] 302 -|Italian (it)|Italy (IT)|it-IT 283 +(% style="width:604.294px" %) 284 +|(% style="width:172px" %)English (en)|(% style="width:216px" %)Australia (AU)|(% style="width:213px" %)en-AU 285 +|(% style="width:172px" %)English (en)|(% style="width:216px" %)Canada (CA)|(% style="width:213px" %)en-CA 286 +|(% style="width:172px" %)English (en)|(% style="width:216px" %)United Kingdom (GB)|(% style="width:213px" %)en-GB 287 +|(% style="width:172px" %)English (en)|(% style="width:216px" %)United States (US)|(% style="width:213px" %)en-US 288 +|(% style="width:172px" %)Estonian (et)|(% style="width:216px" %)Estonia (EE)|(% style="width:213px" %)et-EE 289 +|(% style="width:172px" %)Finnish (fi)|(% style="width:216px" %)Finland (FI)|(% style="width:213px" %)fi-FI 290 +|(% style="width:172px" %)French (fr)|(% style="width:216px" %)Belgium (BE)|(% style="width:213px" %)fr-BE 291 +|(% style="width:172px" %)French (fr)|(% style="width:216px" %)Canada (CA)|(% style="width:213px" %)fr-CA 292 +|(% style="width:172px" %)French (fr)|(% style="width:216px" %)France (FR)|(% style="width:213px" %)fr-FR 293 +|(% style="width:172px" %)French (fr)|(% style="width:216px" %)Luxembourg (LU)|(% style="width:213px" %)fr-LU 294 +|(% style="width:172px" %)French (fr)|(% style="width:216px" %)Switzerland (CH)|(% style="width:213px" %)fr-CH 295 +|(% style="width:172px" %)German (de)|(% style="width:216px" %)Austria (AT)|(% style="width:213px" %)de-AT 296 +|(% style="width:172px" %)German (de)|(% style="width:216px" %)Germany (DE)|(% style="width:213px" %)de-DE 297 +|(% style="width:172px" %)German (de)|(% style="width:216px" %)Luxembourg (LU)|(% style="width:213px" %)de-LU 298 +|(% style="width:172px" %)German (de)|(% style="width:216px" %)Switzerland (CH)|(% style="width:213px" %)de-CH 299 +|(% style="width:172px" %)Greek (el)|(% style="width:216px" %)Cyprus (CY)|(% style="width:213px" %)el-CY(*) 300 +|(% style="width:172px" %)Greek (el)|(% style="width:216px" %)Greece (GR)|(% style="width:213px" %)el-GR 301 +|(% style="width:172px" %)Hebrew (iw)|(% style="width:216px" %)Israel (IL)|(% style="width:213px" %)iw-IL 302 +|(% style="width:172px" %)Hindi (hi)|(% style="width:216px" %)India (IN)|(% style="width:213px" %)hi-IN 303 +|(% style="width:172px" %)Hungarian (hu)|(% style="width:216px" %)Hungary (HU)|(% style="width:213px" %)hu-HU 304 +|(% style="width:172px" %)Icelandic (is)|(% style="width:216px" %)Iceland (IS)|(% style="width:213px" %)is-IS 305 +|(% style="width:172px" %)Indonesian (in)|(% style="width:216px" %)Indonesia (ID)|(% style="width:213px" %)in-ID(*) 306 +|(% style="width:172px" %)Irish (ga)|(% style="width:216px" %)Ireland (IE)|(% style="width:213px" %)ga-IE(*) 307 +|(% style="width:172px" %)Italian (it)|(% style="width:216px" %)Italy (IT)|(% style="width:213px" %)it-IT 303 303 309 +~* - [[https:~~/~~/www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale>>https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#cldrlocale]] 310 + 304 304 Examples 305 305 306 306 22/06/1981 would be described as dd/MM/YYYY, with locale en-GB ... ... @@ -513,8 +513,8 @@ 513 513 514 514 **Note**: The key order is NOT based on the Dimension order of the DSD, as the mapping needs to be resilient to the DSD changing. 515 515 516 -1. 517 -11. 523 +1. 524 +11. 518 518 111. Mapping other data types to Code Id 519 519 520 520 In the case where the incoming data type is not a string and not a code identifier i.e. the source Dimension 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.