Changes for page 13 Structure Mapping

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

From 4.6 to 4.5 From 4.9 to 4.8

From version 4.8

edited by Helena
on 2025/06/16 14:49

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To version 4.6

edited by Helena
on 2025/06/16 14:44

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@@ -189,11 +189,11 @@
  These rules are described using either regular expressions, or substrings for simpler use cases.
--=== 13.6.1 Regular expressions ===
++=== 13.5.1 Regular expressions ===
--Regular expression mapping rules are defined in the [[Representation>>doc:sdmx:Glossary.Representation.WebHome]] Map.
++Regular expression mapping rules are defined in the Representation Map.
--Below is an example set of regular expression rules for a particular [[component>>doc:sdmx:Glossary.Component.WebHome]].
++Below is an example set of regular expression rules for a particular component.
  (% style="width:664.294px" %)
  |(% style="width:141px" %)**Regex**|(% style="width:362px" %)**Description**|(% style="width:158px" %)**Output**
@@ -201,7 +201,7 @@
  |(% style="width:141px" %)^[A-G]|(% style="width:362px" %)Rule match if the input starts with letters A to G|(% style="width:158px" %)OUT_B
  |(% style="width:141px" %)A~|B|(% style="width:362px" %)Rule match if input is either 'A' or 'B'|(% style="width:158px" %)OUT_C
--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]].
++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.
  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
@@ -236,22 +236,21 @@
  |(% style="width:169px" %)ABC_DEF_XYZ|(% style="width:147px" %)5|(% style="width:133px" %)3|(% style="width:171px" %)DEF
  |(% style="width:169px" %)XULADS|(% style="width:147px" %)1|(% style="width:133px" %)2|(% style="width:171px" %)XU
--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:
++Sub-strings can therefore be used for the conceptual rule //If starts with 'XU' map to Y// as shown in the following example:
  (% style="width:628.294px" %)
  |(% style="width:163px" %)Start|(% style="width:158px" %)Length|(% style="width:128px" %)Source|(% style="width:176px" %)Target
  |(% style="width:163px" %)1|(% style="width:158px" %)2|(% style="width:128px" %)XU|(% style="width:176px" %)Y
--== 13.7 Mapping non-SDMX time formats to SDMX formats ==
++== 13.6 Mapping non-SDMX time formats to SDMX formats ==
--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.
++Structure mapping allows non-SDMX compliant time values in source datasets to be mapped to an SDMX compliant time format.
  Two types of time input are defined:
--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.
++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.
--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:
++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:
  |Frequency|Format|Example
  |A|YYYY|2010
@@ -271,13 +271,13 @@
  There are two important points to note:
--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.
--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.
++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.
++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.
++11.
++111. Pattern based dates
--=== 13.7.1 Pattern based dates ===
++Date and time formats 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 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.
--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.
--
  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:
  |English (en)|Australia (AU)|en-AU
@@ -517,8 +517,8 @@
  **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.
--1.
--11.
++1.
++11.
 . Mapping other data types to Code Id
  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.