Changes for page 4 General Notes for Implementers

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From 3.7 to 3.8 From 5.3 to 5.4

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@@ -2,13 +2,13 @@
  {{toc/}}
  {{/box}}
--This section discusses a number of topics other than the exchange of data sets in SDMX formats. Supported only in SDMX-ML (and some in SDMX-JSON), these topics include the use of the reference metadata mechanism in SDMX, the use of Structure Sets and Reporting Taxonomies, the use of Processes, a discussion of time and datatyping, and the conventional mechanisms within the SDMX-ML Structure message regarding versioning and referencing.
++This section discusses a number of topics other than the exchange of [[data sets>>doc:xwiki:Glossary.Data set.WebHome]] in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] formats. Supported only in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] (and some in [[SDMX-JSON>>doc:xwiki:Glossary.SDMX-JSON.WebHome]]), these topics include the use of the [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] mechanism in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]], the use of [[Structure Sets>>doc:xwiki:Glossary.Structure set.WebHome]] and [[Reporting Taxonomies>>doc:xwiki:Glossary.Reporting taxonomy.WebHome]], the use of Processes, a discussion of time and datatyping, and the conventional mechanisms within the [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] Structure message regarding versioning and referencing.
  == {{id name="_Toc291504"/}}4.1 Representations ==
  This section does not go into great detail on these topics but provides a useful overview of these features to assist implementors in further use of the parts of the specification which are relevant to them.
--There are several different representations in SDMX-ML, taken from XML Schemas and common programming languages. The table below describes the various representations, which are found in SDMX-ML, and their equivalents.
++There are several different [[representations>>doc:xwiki:Glossary.Representation.WebHome]] in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]], taken from XML Schemas and common programming languages. The table below describes the various [[representations>>doc:xwiki:Glossary.Representation.WebHome]], which are found in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]], and their equivalents.
  (% style="width:1185.29px" %)
  |(% style="width:250px" %)**SDMX-ML Data Type**|(% style="width:285px" %)**XML Schema Data Type**|(% style="width:271px" %)**.NET Framework Type**|(% style="width:354px" %)**Java Data Type**
@@ -30,7 +30,7 @@
  |(% style="width:250px" %)Day, MonthDay, Month|(% style="width:285px" %)xsd:g*|(% style="width:271px" %)System.DateTime|(% style="width:354px" %)javax.xml.datatype.XMLG regorianCalendar
  |(% style="width:250px" %)Duration|(% style="width:285px" %)xsd:duration|(% style="width:271px" %)System.TimeSpan|(% style="width:354px" %)javax.xml.datatype.Dura tion
--There are also a number of SDMX-ML data types which do not have these direct correspondences, often because they are composite representations or restrictions of a broader data type. For most of these, there are simple types which can be referenced from the SDMX schemas, for others a derived simple type will be necessary:
++There are also a number of [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] data types which do not have these direct correspondences, often because they are composite [[representations>>doc:xwiki:Glossary.Representation.WebHome]] or restrictions of a broader data type. For most of these, there are simple types which can be referenced from the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] schemas, for others a derived simple type will be necessary:
  * AlphaNumeric (common:AlphaNumericType, string which only allows A-z and 0-9)
  * Alpha (common:AlphaType, string which only allows A-z)
@@ -37,7 +37,7 @@
  * Numeric (common:NumericType, string which only allows 0-9, but is not numeric so that is can having leading zeros)
  * Count (xs:integer, a sequence with an interval of "1")
  * InclusiveValueRange (xs:decimal with the minValue and maxValue facets supplying the bounds)
--* ExclusiveValueRange (xs:decimal with the minValue and maxValue facets supplying the bounds)
++* ExclusiveValueRange (xs:decimal with the minValue and maxValue [[facets>>doc:xwiki:Glossary.Facet.WebHome]] supplying the bounds)
  * Incremental (xs:decimal with a specified interval; the interval is typically enforced outside of the XML validation)
  * TimeRange (common:TimeRangeType, startDateTime + Duration)
  * ObservationalTimePeriod (common:ObservationalTimePeriodType, a union of StandardTimePeriod and TimeRange).
@@ -57,29 +57,29 @@
  * IdentifiableReference (types for each IdentifiableObject)
  * GeospatialInformation (a geo feature set, according to the pattern in section 7.2)
--Data types also have a set of facets:
++Data types also have a set of [[facets>>doc:xwiki:Glossary.Facet.WebHome]]:
  * isSequence = true | false (indicates a sequentially increasing value)
  * minLength = positive integer (# of characters/digits)
  * maxLength = positive integer (# of characters/digits)
--* startValue = decimal (for numeric sequence)
--* endValue = decimal (for numeric sequence)
--* interval = decimal (for numeric sequence)
++* startValue = [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] (for numeric sequence)
++* endValue = [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] (for numeric sequence)
++* interval = [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] (for numeric sequence)
  * timeInterval = duration
  * startTime = BasicTimePeriod (for time range) endTime = BasicTimePeriod (for time range)
--* minValue = decimal (for numeric range)
--* maxValue = decimal (for numeric range)
--* decimal = Integer (# of digits to right of decimal point)
++* minValue = [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] (for numeric range)
++* maxValue = [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] (for numeric range)
++* [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] = Integer (# of digits to right of [[decimal>>doc:xwiki:Glossary.Decimals.WebHome]] point)
  * pattern = (a regular expression, as per W3C XML Schema)
  * isMultiLingual = boolean (for specifying text can occur in more than one language)
--Note that code lists may also have textual representations assigned to them, in addition to their enumeration of codes.
++Note that [[code lists>>doc:xwiki:Glossary.Code list.WebHome]] may also have textual [[representations>>doc:xwiki:Glossary.Representation.WebHome]] assigned to them, in addition to their enumeration of [[codes>>doc:xwiki:Glossary.Code.WebHome]].
  === {{id name="_Toc291505"/}}4.1.1 Data Types ===
--XML and JSON schemas support a variety of data types that, although rich, are not mapped one-to-one in all cases. This section provides an explanation of the mapping performed in SDMX 3.0, between such cases.
++XML and JSON schemas support a variety of data types that, although rich, are not (% style="color:#2ecc71" %)mapped(%%) one-to-one in all cases. This section provides an explanation of the mapping performed in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 3.0, between such cases.
--For identifiers, text fields and Codes there are no restriction from either side, since a generic type (e.g., that of string) accompanied by the proper regular expression works equally well for both XML and JSON.
++For identifiers, text fields and [[Codes>>doc:xwiki:Glossary.Code.WebHome]] there are no restriction from either side, since a generic type (e.g., that of string) accompanied by the proper regular expression works equally well for both XML and JSON.
  For example, for the id type, this is the XML schema definition:
@@ -98,7 +98,7 @@
  >   "pattern": "^[A-Za-z0-9_@$-]+$"
  > }
--There are also cases, though, that data types cannot be mapped like above. One such case is the array data type, which was introduced in SDMX 3.0 as a new representation. In JSON schema an array is already natively foreseen, while in the XML schema, this has to be defined as a complex type, with an SDMX specific definition (i.e., specific element/attribute names for SDMX). Beyond that, the minimum and/or maximum number of items within an array is possible in both cases.
++There are also cases, though, that data types cannot be (% style="color:#2ecc71" %)mapped(%%) like above. One such case is the array data type, which was introduced in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 as a new [[representation>>doc:xwiki:Glossary.Representation.WebHome]]. In JSON schema an array is already natively foreseen, while in the XML schema, this has to be defined as a complex type, with an [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] specific definition (i.e., specific element/[[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] names for [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]). Beyond that, the minimum and/or maximum number of items within an array is possible in both cases.
  Further to the above, the mapping between the non-native data types is presented in the table below:
@@ -132,52 +132,57 @@
  === {{id name="_Toc291507"/}}4.2.1 Introduction ===
--First, it is important to recognize that most observation times are a period. SDMX specifies precisely how Time is handled.
++First, it is important to recognize that most observation times are a period. [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] specifies precisely how Time is handled.
--The representation of time is broken into a hierarchical collection of representations. A data structure definition can use of any of the representations in the hierarchy as the representation of time. This allows for the time dimension of a particular data structure definition allow for only a subset of the default representation.
++The [[representation>>doc:xwiki:Glossary.Representation.WebHome]] of time is broken into a hierarchical collection of [[representations>>doc:xwiki:Glossary.Representation.WebHome]]. A [[data structure definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] can use of any of the [[representations>>doc:xwiki:Glossary.Representation.WebHome]] in the [[hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] as the [[representation>>doc:xwiki:Glossary.Representation.WebHome]] of time. This allows for the time [[dimension>>doc:xwiki:Glossary.Dimension.WebHome]] of a particular [[data structure definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] allow for only a subset of the default [[representation>>doc:xwiki:Glossary.Representation.WebHome]].
--The hierarchy of time formats is as follows (**bold** indicates a category which is made up of multiple formats, //italic// indicates a distinct format):
++The [[hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] of [[time formats>>doc:xwiki:Glossary.Time format.WebHome]] is as follows (**bold** indicates a [[category>>doc:xwiki:Glossary.Category.WebHome]] which is made up of multiple formats, //italic// indicates a distinct format):
--* **Observational Time Period **o **Standard Time Period**
--* **Basic Time Period**
--* **Gregorian Time Period**
--** //Date Time//
--* **Reporting Time Period**
--**//Time Range//**
++* **Observational Time Period**
++** **Standard Time Period**
++*** **Basic Time Period**
++**** **Gregorian Time Period**
++**** //Date Time//
++*** **Reporting Time Period**
++** **//Time Range//**
--The details of these time period categories and of the distinct formats which make them up are detailed in the sections to follow.
++The details of these [[time period>>doc:xwiki:Glossary.Time period.WebHome]] [[categories>>doc:xwiki:Glossary.Category.WebHome]] and of the distinct formats which make them up are detailed in the sections to follow.
  === {{id name="_Toc291508"/}}4.2.2 Observational Time Period ===
--This is the superset of all time representations in SDMX. This allows for time to be expressed as any of the allowable formats.
++This is the superset of all time [[representations>>doc:xwiki:Glossary.Representation.WebHome]] in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]. This allows for time to be expressed as any of the allowable formats.
  === {{id name="_Toc291509"/}}4.2.3 Standard Time Period ===
--This is the superset of any predefined time period or a distinct point in time. A time period consists of a distinct start and end point. If the start and end of a period are expressed as date instead of a complete date time, then it is implied that the start of the period is the beginning of the start day (i.e. 00:00:00) and the end of the period is the end of the end day (i.e. 23:59:59).
++This is the superset of any predefined [[time period>>doc:xwiki:Glossary.Time period.WebHome]] or a distinct point in time. A [[time period>>doc:xwiki:Glossary.Time period.WebHome]] consists of a distinct start and end point. If the start and end of a period are expressed as date instead of a complete date time, then it is implied that the start of the period is the beginning of the start day (i.e. 00:00:00) and the end of the period is the end of the end day (i.e. 23:59:59).
  === {{id name="_Toc291510"/}}4.2.4 Gregorian Time Period ===
--A Gregorian time period is always represented by a Gregorian year, year-month, or day. These are all based on ISO 8601 dates. The representation in SDMX-ML messages and the period covered by each of the Gregorian time periods are as follows:
++A Gregorian [[time period>>doc:xwiki:Glossary.Time period.WebHome]] is always represented by a Gregorian year, year-month, or day. These are all based on ISO 8601 dates. The [[representation>>doc:xwiki:Glossary.Representation.WebHome]] in [[SDMX-ML>>doc:xwiki:Glossary.SDMX-ML.WebHome]] messages and the period covered by each of the Gregorian [[time periods>>doc:xwiki:Glossary.Time period.WebHome]] are as follows:
  **Gregorian Year:**
--Representation: xs:gYear (YYYY)
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: xs:gYear (YYYY)
--Period: the start of January 1 to the end of December 31 **Gregorian Year Month**:
++Period: the start of January 1 to the end of December 31
--Representation: xs:gYearMonth (YYYY-MM)
++**Gregorian Year Month**:
--Period: the start of the first day of the month to end of the last day of the month **Gregorian Day**:
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: xs:gYearMonth (YYYY-MM)
--Representation: xs:date (YYYY-MM-DD)
++Period: the start of the first day of the month to end of the last day of the month
++**Gregorian Day**:
++
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: xs:date (YYYY-MM-DD)
++
  Period: the start of the day (00:00:00) to the end of the day (23:59:59)
  === {{id name="_Toc291511"/}}4.2.5 Date Time ===
--This is used to unambiguously state that a date-time represents an observation at a single point in time. Therefore, if one wants to use SDMX for data which is measured at a distinct point in time rather than being reported over a period, the date-time representation can be used.
++This is used to unambiguously state that a date-time represents an observation at a single point in time. Therefore, if one wants to use [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] for data which is measured at a distinct point in time rather than being reported over a period, the date-time [[representation>>doc:xwiki:Glossary.Representation.WebHome]] can be used.
--Representation: xs:dateTime (YYYY-MM-DDThh:mm:ss)^^[[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^2^^>>path:#sdfootnote2sym||name="sdfootnote2anc"]](%%)^^
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: xs:dateTime (YYYY-MM-DDThh:mm:ss){{footnote}}The seconds can be reported fractionally{{/footnote}}
  === {{id name="_Toc291512"/}}4.2.6 Standard Reporting Period ===
@@ -191,7 +191,7 @@
  PERIOD_VALUE indicates the actual period within the year
--The following section details each of the standard reporting periods defined in SDMX:
++The following section details each of the standard reporting periods defined in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]]:
  **Reporting Year**:
@@ -201,8 +201,10 @@
  Limit per year: 1
--Representation: common:ReportingYearType (YYYY-A1, e.g. 2000-A1) **Reporting Semester:**
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingYearType (YYYY-A1, e.g. 2000-A1)
++**Reporting Semester:**
++
  Period Indicator: S
  Period Duration: P6M (six months)
@@ -209,10 +209,8 @@
  Limit per year: 2
--Representation: common:ReportingSemesterType (YYYY-Ss, e.g. 2000-S2)
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingSemesterType (YYYY-Ss, e.g. 2000-S2)
--[[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_59eee18f.gif||alt="Shape2" height="1" width="192"]]
--
  **Reporting Trimester:**
  Period Indicator: T
@@ -221,8 +221,10 @@
  Limit per year: 3
--Representation: common:ReportingTrimesterType (YYYY-Tt, e.g. 2000-T3) **Reporting Quarter:**
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingTrimesterType (YYYY-Tt, e.g. 2000-T3)
++**Reporting Quarter:**
++
  Period Indicator: Q
  Period Duration: P3M (three months)
@@ -229,8 +229,10 @@
  Limit per year: 4
--Representation: common:ReportingQuarterType (YYYY-Qq, e.g. 2000-Q4) **Reporting Month**:
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingQuarterType (YYYY-Qq, e.g. 2000-Q4)
++**Reporting Month**:
++
  Period Indicator: M
  Period Duration: P1M (one month)
@@ -237,7 +237,7 @@
  Limit per year: 1
--Representation: common:ReportingMonthType (YYYY-Mmm, e.g. 2000-M12)
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingMonthType (YYYY-Mmm, e.g. 2000-M12)
  Notes: The reporting month is always represented as two digits, therefore 1-9 are 0 padded (e.g. 01). This allows the values to be sorted chronologically using textual sorting methods.
@@ -249,9 +249,9 @@
  Limit per year: 53
--Representation: common:ReportingWeekType (YYYY-Www, e.g. 2000-W53)
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingWeekType (YYYY-Www, e.g. 2000-W53)
--Notes: There are either 52 or 53 weeks in a reporting year. This is based on the ISO 8601 definition of a week (Monday - Saturday), where the first week of a reporting year is defined as the week with the first Thursday on or after the reporting year start day.^^[[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^3^^>>path:#sdfootnote3sym||name="sdfootnote3anc"]](%%)^^ The reporting week is always represented as two digits, therefore 1-9 are 0 padded (e.g. 01). This allows the values to be sorted chronologically using textual sorting methods.
++Notes: There are either 52 or 53 weeks in a reporting year. This is based on the ISO 8601 definition of a week (Monday - Saturday), where the first week of a reporting year is defined as the week with the first Thursday on or after the reporting year start day.{{footnote}}ISO 8601 defines alternative definitions for the first week, all of which produce equivalent results. Any of these definitions could be substituted so long as they are in relation to the reporting year start day.{{/footnote}} The reporting week is always represented as two digits, therefore 1-9 are 0 padded (e.g. 01). This allows the values to be sorted chronologically using textual sorting methods.
  **Reporting Day**:
@@ -261,113 +261,83 @@
  Limit per year: 366
--Representation: common:ReportingDayType (YYYY-Dddd, e.g. 2000-D366)
++[[Representation>>doc:xwiki:Glossary.Representation.WebHome]]: common:ReportingDayType (YYYY-Dddd, e.g. 2000-D366)
  Notes: There are either 365 or 366 days in a reporting year, depending on whether the reporting year includes leap day (February 29). The reporting day is always represented as three digits, therefore 1-99 are 0 padded (e.g. 001). This allows the values to be sorted chronologically using textual sorting methods.
  The meaning of a reporting year is always based on the start day of the year and requires that the reporting year is expressed as the year at the start of the period. This start day is always the same for a reporting year, and is expressed as a day and a month (e.g. July 1). Therefore, the reporting year 2000 with a start day of July 1 begins on July 1, 2000.
--A specialized attribute (reporting year start day) exists for the purpose of communicating the reporting year start day. This attribute has a fixed identifier
++A specialized [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] (reporting year start day) exists for the purpose of communicating the reporting year start day. This [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] has a fixed identifier
--(REPORTING_YEAR_START_DAY) and a fixed representation (xs:gMonthDay) so that it can always be easily identified and processed in a data message. Although this attribute exists in specialized sub-class, it functions the same as any other attribute outside of its identification and representation. It must takes its identity from a concept and state its relationship with other components of the data structure definition. The ability to state this relationship allows this reporting year start day attribute to exist at the appropriate levels of a data message. In the absence of this attribute, the reporting year start date is assumed to be January 1; therefore if the reporting year coincides with the calendar year, this Attribute is not necessary.
++(REPORTING_YEAR_START_DAY) and a fixed [[representation>>doc:xwiki:Glossary.Representation.WebHome]] (xs:gMonthDay) so that it can always be easily identified and processed in a data message. Although this [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] exists in specialized sub-class, it functions the same as any other [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] outside of its identification and [[representation>>doc:xwiki:Glossary.Representation.WebHome]]. It must takes its identity from a (% style="color:#2ecc71" %)concept(%%) and state its relationship with other [[components>>doc:xwiki:Glossary.Component.WebHome]] of the [[data structure definition>>doc:xwiki:Glossary.Data structure definition.WebHome]]. The ability to state this relationship allows this reporting year start day [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] to exist at the appropriate (% style="color:#2ecc71" %)levels(%%) of a data message. In the absence of this [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]], the reporting year start date is assumed to be January 1; therefore if the reporting year coincides with the calendar year, this [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is not necessary.
--Since the duration and the reporting year start day are known for any reporting period, it is possible to relate any reporting period to a distinct calendar period. The actual
++Since the duration and the reporting year start day are known for any reporting period, it is possible to relate any reporting period to a distinct calendar period. The actual Gregorian calendar period covered by the reporting period can be computed as follows (based on the standard format of [REPROTING_YEAR]-[PERIOD_INDICATOR][PERIOD_VALUE] and the reporting year start day as [REPORTING_YEAR_START_DAY]):
--Gregorian calendar period covered by the reporting period can be computed as follows
++**~1. Determine [REPORTING_YEAR_BASE]:**
--(based on the standard format of [REPROTING_YEAR]-
--
--[PERIOD_INDICATOR][PERIOD_VALUE] and the reporting year start day as [REPORTING_YEAR_START_DAY]):
--
--1. **Determine [REPORTING_YEAR_BASE]:**
--
  Combine [REPORTING_YEAR] of the reporting period value (YYYY) with [REPORTING_YEAR_START_DAY] (MM-DD) to get a date (YYYY-MM-DD).
--
  This is the [REPORTING_YEAR_START_DATE]
--1.
--11. **If the [PERIOD_INDICATOR] is W:**
--111. **If [REPORTING_YEAR_START_DATE] is a Friday, Saturday, or Sunday:**
++**a) If the [PERIOD_INDICATOR] is W:**
--Add^^[[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^4^^>>path:#sdfootnote4sym||name="sdfootnote4anc"]](%%)^^ (P3D, P2D, or P1D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE].
++      ~1. **If [REPORTING_YEAR_START_DATE] is a Friday, Saturday, or Sunday**:
++       Add{{footnote}}The rules for adding durations to a date time are described in the W3C XML Schema specification. See http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes for further details.{{/footnote}} (P3D, P2D, or P1D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE].
--1.
--11.
--111. **If [REPORTING_YEAR_START_DATE] is a Monday, Tuesday, Wednesday, or Thursday:**
++**~      2. If [REPORTING_YEAR_START_DATE] is a Monday, Tuesday, Wednesday, or Thursday:**
++      Add^^4^^ (P0D, -P1D, -P2D, or -P3D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE].
--Add^^4^^ (P0D, -P1D, -P2D, or -P3D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE].
--
--1.
--11. **Else:**
--
++**b) Else:**
  The [REPORTING_YEAR_START_DATE] is the [REPORTING_YEAR_BASE].
--1. **Determine [PERIOD_DURATION]:**
--11. If the [PERIOD_INDICATOR] is A, the [PERIOD_DURATION] is P1Y.
--11. If the [PERIOD_INDICATOR] is S, the [PERIOD_DURATION] is P6M.
--11. If the [PERIOD_INDICATOR] is T, the [PERIOD_DURATION] is P4M.
--11. If the [PERIOD_INDICATOR] is Q, the [PERIOD_DURATION] is P3M.
--11. If the [PERIOD_INDICATOR] is M, the [PERIOD_DURATION] is P1M.
--11. If the [PERIOD_INDICATOR] is W, the [PERIOD_DURATION] is P7D.
--11. If the [PERIOD_INDICATOR] is D, the [PERIOD_DURATION] is P1D.
--1. **Determine [PERIOD_START]:**
++**2. Determine [PERIOD_DURATION]:**
++a) If the [PERIOD_INDICATOR] is A, the [PERIOD_DURATION] is P1Y.
++b) If the [PERIOD_INDICATOR] is S, the [PERIOD_DURATION] is P6M.
++c) If the [PERIOD_INDICATOR] is T, the [PERIOD_DURATION] is P4M.
++d) If the [PERIOD_INDICATOR] is Q, the [PERIOD_DURATION] is P3M.
++e) If the [PERIOD_INDICATOR] is M, the [PERIOD_DURATION] is P1M.
++f) If the [PERIOD_INDICATOR] is W, the [PERIOD_DURATION] is P7D.
++g) If the [PERIOD_INDICATOR] is D, the [PERIOD_DURATION] is P1D.
++**3. Determine [PERIOD_START]:**
--Subtract one from the [PERIOD_VALUE] and multiply this by the [PERIOD_DURATION]. Add^^4^^ this to the [REPORTING_YEAR_BASE]. The result is the [PERIOD_START]. **4. Determine the [PERIOD_END]:**
++Subtract one from the [PERIOD_VALUE] and multiply this by the [PERIOD_DURATION]. Add{{footnote}}The rules for adding durations to a date time are described in the W3C XML Schema specification. See http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes for further details.{{/footnote}} this to the [REPORTING_YEAR_BASE]. The result is the [PERIOD_START].
--Multiply the [PERIOD_VALUE] by the [PERIOD_DURATION]. Add^^4^^ this to the [REPORTING_YEAR_BASE] add^^4^^ -P1D. The result is the [PERIOD_END].
++**4. Determine the [PERIOD_END]:**
++Multiply the [PERIOD_VALUE] by the [PERIOD_DURATION]. Add{{footnote}}The rules for adding durations to a date time are described in the W3C XML Schema specification. See http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes for further details.{{/footnote}} this to the [REPORTING_YEAR_BASE] add{{footnote}}The rules for adding durations to a date time are described in the W3C XML Schema specification. See http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes for further details.{{/footnote}} -P1D. The result is the [PERIOD_END].
++
  For all of these ranges, the bounds include the beginning of the [PERIOD_START] (i.e. 00:00:00) and the end of the [PERIOD_END] (i.e. 23:59:59).
  **Examples:**
  **2010-Q2, REPORTING_YEAR_START_DAY = ~-~-07-01 (July 1)**
++~1. [REPORTING_YEAR_START_DATE] = 2010-07-01
++        b) [REPORTING_YEAR_BASE] = 2010-07-01
++2. [PERIOD_DURATION] = P3M
++3. (2-1) * P3M = P3M
++     2010-07-01 + P3M = 2010-10-01
++     [PERIOD_START] = 2010-10-01
--1. [REPORTING_YEAR_START_DATE] = 2010-07-01
++4. 2 * P3M = P6M
++     2010-07-01 + P6M = 2010-13-01 = 2011-01-01
++     2011-01-01 + -P1D = 2010-12-31
++     [PERIOD_END] = 2010-12-31
--b) [REPORTING_YEAR_BASE] = 2010-07-01
--
--1. [PERIOD_DURATION] = P3M
--1. (2-1) * P3M = P3M
--
--2010-07-01 + P3M = 2010-10-01
--
--[PERIOD_START] = 2010-10-01
--
--1. 2 * P3M = P6M
--
--2010-07-01 + P6M = 2010-13-01 = 2011-01-01
--
--2011-01-01 + -P1D = 2010-12-31
--
--[PERIOD_END] = 2010-12-31
--
  The actual calendar range covered by 2010-Q2 (assuming the reporting year begins July 1) is 2010-10-01T00:00:00/2010-12-31T23:59:59
  **2011-W36, REPORTING_YEAR_START_DAY = ~-~-07-01 (July 1)**
++~1. [REPORTING_YEAR_START_DATE] = 2010-07-01
++       a) 2011-07-01 = Friday
++           2011-07-01 + P3D = 2011-07-04
++           [REPORTING_YEAR_BASE] = 2011-07-04
++2. [PERIOD_DURATION] = P7D
++3. (36-1) * P7D = P245D
++        2011-07-04 + P245D = 2012-03-05
++        [PERIOD_START] = 2012-03-05
++4. 36 * P7D = P252D
++     2011-07-04 + P252D =2012-03-12
++     2012-03-12 + -P1D = 2012-03-11
++     [PERIOD_END] = 2012-03-11
--1. [REPORTING_YEAR_START_DATE] = 2010-07-01
--
--a) 2011-07-01 = Friday
--
--2011-07-01 + P3D = 2011-07-04
--
--[REPORTING_YEAR_BASE] = 2011-07-04
--
--1. [PERIOD_DURATION] = P7D
--1. (36-1) * P7D = P245D
--
--2011-07-04 + P245D = 2012-03-05
--
--[PERIOD_START] = 2012-03-05
--
--1. 36 * P7D = P252D
--
--2011-07-04 + P252D =2012-03-12
--
--2012-03-12 + -P1D = 2012-03-11
--
--[PERIOD_END] = 2012-03-11
--
  The actual calendar range covered by 2011-W36 (assuming the reporting year begins July 1) is 2012-03-05T00:00:00/2012-03-11T23:59:59
  === {{id name="_Toc291513"/}}4.2.7 Distinct Range ===
@@ -378,29 +378,29 @@
  In version 2.0 of SDMX there is a recommendation to use the time format attribute to gives additional information on the way time is represented in the message. Following an appraisal of its usefulness this is no longer required. However, it is still possible, if required , to include the time format attribute in SDMX-ML.
--|Code|Format
--|OTP|Observational Time Period: Superset of all SDMX time formats (Gregorian Time Period, Reporting Time Period, and Time Range)
--|STP|Standard Time Period: Superset of Gregorian and Reporting Time Periods
--|GTP|Superset of all Gregorian Time Periods and date-time
--|RTP|Superset of all Reporting Time Periods
--|TR|(((
--Time Range: Start time and duration (YYYY-MM-
--
--DD(Thh:mm:ss)?/<duration>)
++(% style="width:771.294px" %)
++|**Code**|(% style="width:659px" %)**Format**
++|OTP|(% style="width:659px" %)Observational Time Period: Superset of all SDMX time formats (Gregorian Time Period, Reporting Time Period, and Time Range)
++|STP|(% style="width:659px" %)Standard Time Period: Superset of Gregorian and Reporting Time Periods
++|GTP|(% style="width:659px" %)Superset of all Gregorian Time Periods and date-time
++|RTP|(% style="width:659px" %)Superset of all Reporting Time Periods
++|TR|(% style="width:659px" %)(((
++Time Range: Start time and duration (YYYY-MM-DD(Thh:mm:ss)?/<duration>)
  )))
--|GY|Gregorian Year (YYYY)
--|GTM|Gregorian Year Month (YYYY-MM)
--|GD|Gregorian Day (YYYY-MM-DD)
--|DT|Distinct Point: date-time (YYYY-MM-DDThh:mm:ss)
--|RY|Reporting Year (YYYY-A1)
--|RS|Reporting Semester (YYYY-Ss)
--|RT|Reporting Trimester (YYYY-Tt)
--|RQ|Reporting Quarter (YYYY-Qq)
--|RM|Reporting Month (YYYY-Mmm)
--|RW|Reporting Week (YYYY-Www)
--|RD|Reporting Day (YYYY-Dddd)
++|GY|(% style="width:659px" %)Gregorian Year (YYYY)
++|GTM|(% style="width:659px" %)Gregorian Year Month (YYYY-MM)
++|GD|(% style="width:659px" %)Gregorian Day (YYYY-MM-DD)
++|DT|(% style="width:659px" %)Distinct Point: date-time (YYYY-MM-DDThh:mm:ss)
++|RY|(% style="width:659px" %)Reporting Year (YYYY-A1)
++|RS|(% style="width:659px" %)Reporting Semester (YYYY-Ss)
++|RT|(% style="width:659px" %)Reporting Trimester (YYYY-Tt)
++|RQ|(% style="width:659px" %)Reporting Quarter (YYYY-Qq)
++|RM|(% style="width:659px" %)Reporting Month (YYYY-Mmm)
++|RW|(% style="width:659px" %)Reporting Week (YYYY-Www)
++|RD|(% style="width:659px" %)Reporting Day (YYYY-Dddd)
--==== Table 1: SDMX-ML Time Format Codes ====
++(% class="wikigeneratedid" id="HTable1:SDMX-MLTimeFormatCodes" %)
++**Table 1: SDMX-ML Time Format Codes**
  === {{id name="_Toc291515"/}}4.2.9 Time Zones ===
@@ -427,11 +427,11 @@
  It has been possible since SDMX 2.0 for a Component to specify a representation of a time span. Depending on the format of the data message, this resulted in either an element with 2 XML attributes for holding the start time and the duration or two separate XML attributes based on the underlying Component identifier. For example, if REF_PERIOD were given a representation of time span, then in the Compact data format, it would be represented by two XML attributes; REF_PERIODStartTime (holding the start) and REF_PERIOD (holding the duration). If a new simple type is introduced in the SDMX schemas that can hold ISO 8601 time intervals, then this will no longer be necessary. What was represented as this:
--<Series REF_PERIODStartTime="2000-01-01T00:00:00" REF_PERIOD="P2M"/>
++> <Series REF_PERIODStartTime="2000-01-01T00:00:00" REF_PERIOD="P2M"/>
  can now be represented with this:
--<Series REF_PERIOD="2000-01-01T00:00:00/P2M"/>
++> <Series REF_PERIOD="2000-01-01T00:00:00/P2M"/>
  === {{id name="_Toc291517"/}}4.2.11 Notes on Formats ===
@@ -447,12 +447,13 @@
  Fundamental to processing a time value parameter in a query message is understanding that all time periods should be handled as a distinct range of time. Since the time parameter in the query is paired with an operator, this also effectively represents a distinct range of time. Therefore, a system processing the query must simply match the data where the time period for requested parameter is encompassed by the time period resulting from value of the query parameter. The following table details how the operators should be interpreted for any time period provided as a parameter.
--|**Operator**|**Rule**
--|Greater Than|Any data after the last moment of the period
--|Less Than|Any data before the first moment of the period
--|Greater Than or Equal To|Any data on or after the first moment of the period
--|Less Than or Equal To|Any data on or before the last moment of the period
--|Equal To|Any data which falls on or after the first moment of the period and before or on the last moment of the period
++(% style="width:1020.29px" %)
++|(% style="width:236px" %)**Operator**|(% style="width:781px" %)**Rule**
++|(% style="width:236px" %)Greater Than|(% style="width:781px" %)Any data after the last moment of the period
++|(% style="width:236px" %)Less Than|(% style="width:781px" %)Any data before the first moment of the period
++|(% style="width:236px" %)Greater Than or Equal To|(% style="width:781px" %)Any data on or after the first moment of the period
++|(% style="width:236px" %)Less Than or Equal To|(% style="width:781px" %)Any data on or before the last moment of the period
++|(% style="width:236px" %)Equal To|(% style="width:781px" %)Any data which falls on or after the first moment of the period and before or on the last moment of the period
  Reporting Time Periods as query parameters are handled like this: any data within the bounds of the reporting period for the year is matched, regardless of the actual start day of the reporting year. In addition, data reported against a normal calendar period is matched if it falls within the bounds of the time parameter based on a reporting year start day of January 1. When determining whether another reporting period falls within the bounds of a report period query parameter, one will have to take into account the actual time period to compare weeks and days to higher order report periods. This will be demonstrated in the examples to follow.
@@ -459,11 +459,8 @@
  **Examples:**
  **Gregorian Period**
--
  Query Parameter: Greater than 2010
--
  Literal Interpretation: Any data where the start period occurs after 2010-1231T23:59:59.
--
  Example Matches:
  * 2011 or later
@@ -479,11 +479,10 @@
  * 2010-D185 or later (reporting year start day ~-~-07-01 or later)
  **Reporting Period**
--
  Query Parameter: Greater than or equal to 2010-Q3
++Literal Interpretation: Any data with a reporting period where the start period is on or after the start period of 2010-Q3 for the same reporting year start day, or and data where the start period is on or after 2010-07-01.
++Example Matches:
--Literal Interpretation: Any data with a reporting period where the start period is on or after the start period of 2010-Q3 for the same reporting year start day, or and data where the start period is on or after 2010-07-01. Example Matches:
--
  * 2011 or later
  * 2010-07 or later
  * 2010-07-01 or later
@@ -501,7 +501,7 @@
  Versioning operates at the level of versionable and maintainable objects in the SDMX information model. Within the SDMX Structure and MetadataSet messages, there is a well-defined pattern for artefact versioning and referencing. The artefact identifiers are qualified by their version numbers – that is, an object with an Agency of "A", and ID of "X" and a version of "1.0.0" is a different object than one with an Agency of "A", an ID of "X", and a version of "1.1.0".
--As of SDMX 3.0, the versioning rules are extended to allow for truly versioned artefacts through the implementation of the rules of the well-known practice called "Semantic Versioning" [[(>>url:http://semver.org/]][[__http:~~/~~/semver.org__>>url:http://semver.org/]][[)>>url:http://semver.org/]], in addition to the legacy non-restrictive versioning scheme. In addition, the "isFinal" property is removed from //MaintainableArtefact//. According to the legacy versioning, any artefact defined without a version is equivalent to following the legacy versioning, thus having version ‘1.0’.
++As of SDMX 3.0, the versioning rules are extended to allow for truly versioned artefacts through the implementation of the rules of the well-known practice called "Semantic Versioning" ([[__http:~~/~~/semver.org__>>https://http:semver.org]]), in addition to the legacy non-restrictive versioning scheme. In addition, the "isFinal" property is removed from //MaintainableArtefact//. According to the legacy versioning, any artefact defined without a version is equivalent to following the legacy versioning, thus having version ‘1.0’.
  === 4.3.1 Non-versioned artefacts ===
@@ -509,8 +509,6 @@
  Many existing organisation’s data management systems work with version-less structures and apply ad-hoc structural metadata governance processes. The new nonversioned artefacts will allow supporting those numerous situations, where organisations do not manage version numbers.
--[[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_59eee18f.gif||alt="Shape3" height="1" width="192"]]
--
 -Q3 (with a reporting year start day of ~-~-01-01) starts on 2010-07-01. This is day 4 of week 26, therefore the first week matched is week 27.
 -Q3 (with a reporting year start day of ~-~-07-01) starts on 2011-01-01. This is day 6 of week 27, therefore the first week matched is week 28.