Changes for page 4 General Notes for Implementers
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... ... @@ -10,26 +10,26 @@ 10 10 11 11 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. 12 12 13 -| (% style="width:191px" %)**SDMX-ML Data Type**|(% style="width:232px" %)**XML Schema Data Type**|(% style="width:212px" %)**.NET Framework Type**|(% style="width:980px" %)(((14 - **Java Data Type**13 +|SDMX-ML Data Type|XML Schema Data Type|.NET Framework Type|((( 14 +Java Data Type 15 15 ))) 16 -| (% style="width:191px" %)String|(% style="width:232px" %)xsd:string|(% style="width:212px" %)System.String|(% style="width:980px" %)java.lang.String17 -| (% style="width:191px" %)Big Integer|(% style="width:232px" %)xsd:integer|(% style="width:212px" %)System.Decimal|(% style="width:980px" %)java.math.BigInteger18 -| (% style="width:191px" %)Integer|(% style="width:232px" %)xsd:int|(% style="width:212px" %)System.Int32|(% style="width:980px" %)int19 -| (% style="width:191px" %)Long|(% style="width:232px" %)xsd.long|(% style="width:212px" %)System.Int64|(% style="width:980px" %)long20 -| (% style="width:191px" %)Short|(% style="width:232px" %)xsd:short|(% style="width:212px" %)System.Int16|(%style="width:980px" %)short21 -| (% style="width:191px" %)Decimal|(% style="width:232px" %)xsd:decimal|(% style="width:212px" %)System.Decimal|(% style="width:980px" %)java.math.BigDecimal22 -| (% style="width:191px" %)Float|(% style="width:232px" %)xsd:float|(% style="width:212px" %)System.Single|(% style="width:980px" %)float23 -| (% style="width:191px" %)Double|(% style="width:232px" %)xsd:double|(% style="width:212px" %)System.Double|(% style="width:980px" %)double24 -| (% style="width:191px" %)Boolean|(% style="width:232px" %)xsd:boolean|(% style="width:212px" %)System.Boolean|(% style="width:980px" %)boolean25 -| (% style="width:191px" %)URI|(% style="width:232px" %)xsd:anyURI|(% style="width:212px" %)System.Uri|(% style="width:980px" %)Java.net.URI or java.lang.String26 -| (% style="width:191px" %)DateTime|(% style="width:232px" %)xsd:dateTime|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar27 -| (% style="width:191px" %)Time|(% style="width:232px" %)xsd:time|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar28 -| (% style="width:191px" %)GregorianYear|(% style="width:232px" %)xsd:gYear|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar29 -| (% style="width:191px" %)GregorianMonth|(% style="width:232px" %)xsd:gYearMonth|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar30 -| (% style="width:191px" %)GregorianDay|(% style="width:232px" %)xsd:date|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar31 -| (% style="width:191px" %)Day, MonthDay, Month|(% style="width:232px" %)xsd:g*|(% style="width:212px" %)System.DateTime|(% style="width:980px" %)javax.xml.datatype.XMLGregorianCalendar32 -| (% style="width:191px" %)Duration|(% style="width:232px" %)xsd:duration|(% style="width:212px" %)System.TimeSpan|(% style="width:980px" %)javax.xml.datatype.Duration16 +|**String**|**xsd:string**|**System.String**|**java.lang.String** 17 +|**Big Integer**|**xsd:integer**|**System.Decimal**|**java.math.BigInteger** 18 +|**Integer**|**xsd:int**|**System.Int32**|**int** 19 +|**Long**|**xsd.long**|**System.Int64**|**long** 20 +|**Short**|**xsd:short**|**System.Int16**|**short** 21 +|**Decimal**|**xsd:decimal**|**System.Decimal**|**java.math.BigDecimal** 22 +|**Float**|**xsd:float**|**System.Single**|**float** 23 +|**Double**|**xsd:double**|**System.Double**|**double** 24 +|**Boolean**|**xsd:boolean**|**System.Boolean**|**boolean** 25 +|**URI**|**xsd:anyURI**|**System.Uri**|**Java.net.URI or java.lang.String** 26 +|**DateTime**|**xsd:dateTime**|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 27 +|**Time**|**xsd:time**|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 28 +|**GregorianYear**|**xsd:gYear**|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 29 +|**GregorianMonth**|**xsd:gYearMonth**|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 30 +|**GregorianDay**|**xsd:date**|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 31 +|**Day, MonthDay, Month**|**xsd:g***|**System.DateTime**|**javax.xml.datatype.XMLG regorianCalendar** 32 +|**Duration**|**xsd:duration**|**System.TimeSpan**|**javax.xml.datatype.Dura tion** 33 33 34 34 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: 35 35 ... ... @@ -76,7 +76,7 @@ 76 76 77 77 Note that code lists may also have textual representations assigned to them, in addition to their enumeration of codes. 78 78 79 - ===4.1.1 Data Types===79 +4.1.1 Data Types 80 80 81 81 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. 82 82 ... ... @@ -95,8 +95,8 @@ 95 95 The above looks like this, in JSON schema: 96 96 97 97 > "idType": { 98 -> 99 -> 98 +> "type": "string", 99 +> "pattern": "^[A-Za-z0-9_@$-]+$" 100 100 > } 101 101 102 102 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. ... ... @@ -103,28 +103,47 @@ 103 103 104 104 Further to the above, the mapping between the non-native data types is presented in the table below: 105 105 106 -(% style="width:1005.83px" %) 107 -|(% style="width:198px" %)**SDMX Facet**|(% style="width:241px" %)**XML Schema**|(% style="width:563px" %)**JSON schema **"**pattern**"{{footnote}}Regular expressions, as specified in W3C XML Schema Definition Language (XSD) 1.1 Part 2: Datatypes.{{/footnote}} **for "string" type** 108 -|(% style="width:198px" %)GregorianYear|(% style="width:241px" %)xsd:gYear|(% style="width:563px" %)((( 109 -"^-?([1-9][0-9]{3,}|0[0-9]{3})(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 106 +|**SDMX Facet**|**XML Schema**|**JSON schema **"**pattern**"[[^^~[1~]^^>>path:#_ftn1]] **for "string" type** 107 +|GregorianYear|xsd:gYear|((( 108 +"^-?([1-9][0-9]{3,}|0[0-9]{3})(Z|(\+|-)((0[0- 109 + 110 +9]|1[0-3]):[0-5][0-9]|14:00))?$" 110 110 ))) 111 -|(% style="width:198px" %)GregorianMonth|(% style="width:241px" %)xsd:gYearMonth|(% style="width:563px" %)((( 112 -"^-?([1-9][0-9]{3,}|0[0-9]{3})-(0[1-9]|1[0-2])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 112 +|GregorianMonth|xsd:gYearMonth|((( 113 +"^-?([1-9][0-9]{3,}|0[0-9]{3})-(0[1-9]|1[0- 114 + 115 +2])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0- 116 + 117 +9]|14:00))?$" 113 113 ))) 114 -|(% style="width:198px" %)GregorianDay|(% style="width:241px" %)xsd:date|(% style="width:563px" %)((( 115 -"^-?([1-9][0-9]{3,}|0[0-9]{3})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 119 +|GregorianDay|xsd:date|((( 120 +"^-?([1-9][0-9]{3,}|0[0-9]{3})-(0[1-9]|1[0-2])- 121 + 122 +(0[1-9]|[12][0-9]|3[01])(Z|(\+|-)((0[0-9]|1[0- 123 + 124 +3]):[0-5][0-9]|14:00))?$" 116 116 ))) 117 -|(% style="width:198px" %)Day|(% style="width:241px" %)xsd:gDay|(% style="width:563px" %)((( 118 -"^~-~--(0[1-9]|[12][0-9]|3[01])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 126 +|Day|xsd:gDay|((( 127 +"^~-~--(0[1-9]|[12][0-9]|3[01])(Z|(\+|- 128 + 129 +)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 119 119 ))) 120 -|(% style="width:198px" %)MonthDay|(% style="width:241px" %)xsd:gMonthDay|(% style="width:563px" %)((( 121 -"^~-~-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 131 +|MonthDay|xsd:gMonthDay|((( 132 +"^~-~-(0[1-9]|1[0-2])-(0[1-9]|[12][0- 133 + 134 +9]|3[01])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0- 135 + 136 +9]|14:00))?$" 122 122 ))) 123 -|(% style="width:198px" %)Month|(% style="width:241px" %)xsd:Month|(% style="width:563px" %)((( 124 -"^~-~-(0[1-9]|1[0-2])(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?$" 138 +|Month|xsd:Month|((( 139 +"^~-~-(0[1-9]|1[0-2])(Z|(\+|-)((0[0-9]|1[0- 140 + 141 +3]):[0-5][0-9]|14:00))?$" 125 125 ))) 126 -|(% style="width:198px" %)Duration|(% style="width:241px" %)xsd:duration|(% style="width:563px" %)((( 127 -"^-?P[0-9]+Y?([0-9]+M)?([0-9]+D)?(T([0-9]+H)?([0-9]+M)?([0-9]+(\.[0-9]+)?S)?)?$" 143 +|Duration|xsd:duration|((( 144 +"^-?P[0-9]+Y?([0-9]+M)?([0-9]+D)?(T([0- 145 + 146 +9]+H)?([0-9]+M)?([0-9]+(\.[0-9]+)?S)?)?$" 128 128 ))) 129 129 130 130 == 4.2 Time and Time Format == ... ... @@ -139,14 +139,15 @@ 139 139 140 140 The hierarchy of time formats is as follows (**bold** indicates a category which is made up of multiple formats, //italic// indicates a distinct format): 141 141 142 -* **Observational Time Period** 143 -** **Standard Time Period** 144 -*** **Basic Time Period** 145 -**** **Gregorian Time Period** 146 -**** //Date Time// 147 -*** **Reporting Time Period** 148 -** //Time Range// 161 +* **Observational Time Period **o **Standard Time Period** 149 149 163 + § **Basic Time Period** 164 + 165 +* **Gregorian Time Period** 166 +* //Date Time// 167 + 168 +§ **Reporting Time Period **o //Time Range// 169 + 150 150 The details of these time period categories and of the distinct formats which make them up are detailed in the sections to follow. 151 151 152 152 === 4.2.2 Observational Time Period === ... ... @@ -162,12 +162,11 @@ 162 162 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: 163 163 164 164 **Gregorian Year:** 185 + 165 165 Representation: xs:gYear (YYYY) 166 -Period: the start of January 1 to the end of December 31 167 -**Gregorian Year Month**: 187 +Period: the start of January 1 to the end of December 31 **Gregorian Year Month**: 168 168 Representation: xs:gYearMonth (YYYY-MM) 169 -Period: the start of the first day of the month to end of the last day of the month 170 -**Gregorian Day**: 189 +Period: the start of the first day of the month to end of the last day of the month **Gregorian Day**: 171 171 Representation: xs:date (YYYY-MM-DD) 172 172 Period: the start of the day (00:00:00) to the end of the day (23:59:59) 173 173 ... ... @@ -175,7 +175,7 @@ 175 175 176 176 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. 177 177 178 -Representation: xs:dateTime (YYYY-MM-DDThh:mm:ss) {{footnote}}The seconds can be reported fractionally{{/footnote}}197 +Representation: xs:dateTime (YYYY-MM-DDThh:mm:ss)[[^^~[2~]^^>>path:#_ftn2]] 179 179 180 180 === 4.2.6 Standard Reporting Period === 181 181 ... ... @@ -191,46 +191,77 @@ 191 191 The following section details each of the standard reporting periods defined in SDMX: 192 192 193 193 **Reporting Year**: 194 -Period Indicator: A 213 + 214 + Period Indicator: A 215 + 195 195 Period Duration: P1Y (one year) 217 + 196 196 Limit per year: 1 197 -Representation: common:ReportingYearType (YYYY-A1, e.g. 2000-A1) 198 -**Reporting Semester:** 199 -Period Indicator: S 219 + 220 +Representation: common:ReportingYearType (YYYY-A1, e.g. 2000-A1) **Reporting Semester:** 221 + 222 + Period Indicator: S 223 + 200 200 Period Duration: P6M (six months) 225 + 201 201 Limit per year: 2 227 + 202 202 Representation: common:ReportingSemesterType (YYYY-Ss, e.g. 2000-S2) 229 + 203 203 **Reporting Trimester:** 204 -Period Indicator: T 231 + 232 + Period Indicator: T 233 + 205 205 Period Duration: P4M (four months) 235 + 206 206 Limit per year: 3 207 -Representation: common:ReportingTrimesterType (YYYY-Tt, e.g. 2000-T3) 208 -**Reporting Quarter:** 209 -Period Indicator: Q 237 + 238 +Representation: common:ReportingTrimesterType (YYYY-Tt, e.g. 2000-T3) **Reporting Quarter:** 239 + 240 + Period Indicator: Q 241 + 210 210 Period Duration: P3M (three months) 243 + 211 211 Limit per year: 4 212 -Representation: common:ReportingQuarterType (YYYY-Qq, e.g. 2000-Q4) 213 -**Reporting Month**: 245 + 246 +Representation: common:ReportingQuarterType (YYYY-Qq, e.g. 2000-Q4) **Reporting Month**: 247 + 214 214 Period Indicator: M 249 + 215 215 Period Duration: P1M (one month) 251 + 216 216 Limit per year: 1 253 + 217 217 Representation: 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. 255 + 218 218 **Reporting Week**: 257 + 219 219 Period Indicator: W 259 + 220 220 Period Duration: P7D (seven days) 261 + 221 221 Limit per year: 53 263 + 222 222 Representation: common:ReportingWeekType (YYYY-Www, e.g. 2000-W53) 223 -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 224 -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. 265 + 266 +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.[[^^~[3~]^^>>path:#_ftn3]] 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. 267 + 225 225 **Reporting Day**: 269 + 226 226 Period Indicator: D 271 + 227 227 Period Duration: P1D (one day) 273 + 228 228 Limit per year: 366 275 + 229 229 Representation: 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. 277 + 230 230 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. 231 231 232 -A specialized attribute (reporting year start day) exists for the purpose of communicating the reporting year start day. This attribute 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.280 +A specialized attribute (reporting year start day) exists for the purpose of communicating the reporting year start day. This attribute has a fixed identifier 233 233 282 +(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. 283 + 234 234 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]- 235 235 236 236 [PERIOD_INDICATOR][PERIOD_VALUE] and the reporting year start day as [REPORTING_YEAR_START_DAY]): ... ... @@ -245,7 +245,7 @@ 245 245 11. **If the [PERIOD_INDICATOR] is W:** 246 246 111. **If [REPORTING_YEAR_START_DATE] is a Friday, Saturday, or Sunday:** 247 247 248 -Add[[ (% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^~[4~]^^>>path:#_ftn4]](%%)(P3D, P2D, or P1D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE].298 +Add[[^^~[4~]^^>>path:#_ftn4]] (P3D, P2D, or P1D respectively) to the [REPORTING_YEAR_START_DATE]. The result is the [REPORTING_YEAR_BASE]. 249 249 250 250 1. 251 251 11. ... ... @@ -334,28 +334,29 @@ 334 334 335 335 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. 336 336 337 -|(% style="width:95px" %)Code|(% style="width:1520px" %)Format 338 -|(% style="width:95px" %)OTP|(% style="width:1520px" %)Observational Time Period: Superset of all SDMX time formats (Gregorian Time Period, Reporting Time Period, and Time Range) 339 -|(% style="width:95px" %)STP|(% style="width:1520px" %)Standard Time Period: Superset of Gregorian and Reporting Time Periods 340 -|(% style="width:95px" %)GTP|(% style="width:1520px" %)Superset of all Gregorian Time Periods and date-time 341 -|(% style="width:95px" %)RTP|(% style="width:1520px" %)Superset of all Reporting Time Periods 342 -|(% style="width:95px" %)TR|(% style="width:1520px" %)((( 343 -Time Range: Start time and duration (YYYY-MM-DD(Thh:mm:ss)?/<duration>) 387 +|Code|Format 388 +|OTP|Observational Time Period: Superset of all SDMX time formats (Gregorian Time Period, Reporting Time Period, and Time Range) 389 +|STP|Standard Time Period: Superset of Gregorian and Reporting Time Periods 390 +|GTP|Superset of all Gregorian Time Periods and date-time 391 +|RTP|Superset of all Reporting Time Periods 392 +|TR|((( 393 +Time Range: Start time and duration (YYYY-MM- 394 + 395 +DD(Thh:mm:ss)?/<duration>) 344 344 ))) 345 -| (% style="width:95px" %)GY|(% style="width:1520px" %)Gregorian Year (YYYY)346 -| (% style="width:95px" %)GTM|(% style="width:1520px" %)Gregorian Year Month (YYYY-MM)347 -| (% style="width:95px" %)GD|(% style="width:1520px" %)Gregorian Day (YYYY-MM-DD)348 -| (% style="width:95px" %)DT|(% style="width:1520px" %)Distinct Point: date-time (YYYY-MM-DDThh:mm:ss)349 -| (% style="width:95px" %)RY|(% style="width:1520px" %)Reporting Year (YYYY-A1)350 -| (% style="width:95px" %)RS|(% style="width:1520px" %)Reporting Semester (YYYY-Ss)351 -| (% style="width:95px" %)RT|(% style="width:1520px" %)Reporting Trimester (YYYY-Tt)352 -| (% style="width:95px" %)RQ|(% style="width:1520px" %)Reporting Quarter (YYYY-Qq)353 -| (% style="width:95px" %)RM|(% style="width:1520px" %)Reporting Month (YYYY-Mmm)354 -| (% style="width:95px" %)RW|(% style="width:1520px" %)Reporting Week (YYYY-Www)355 -| (% style="width:95px" %)RD|(% style="width:1520px" %)Reporting Day (YYYY-Dddd)397 +|GY|Gregorian Year (YYYY) 398 +|GTM|Gregorian Year Month (YYYY-MM) 399 +|GD|Gregorian Day (YYYY-MM-DD) 400 +|DT|Distinct Point: date-time (YYYY-MM-DDThh:mm:ss) 401 +|RY|Reporting Year (YYYY-A1) 402 +|RS|Reporting Semester (YYYY-Ss) 403 +|RT|Reporting Trimester (YYYY-Tt) 404 +|RQ|Reporting Quarter (YYYY-Qq) 405 +|RM|Reporting Month (YYYY-Mmm) 406 +|RW|Reporting Week (YYYY-Www) 407 +|RD|Reporting Day (YYYY-Dddd) 356 356 357 -(% class="wikigeneratedid" id="HTable1:SDMX-MLTimeFormatCodes" %) 358 -**Table 1: SDMX-ML Time Format Codes** 409 +==== Table 1: SDMX-ML Time Format Codes ==== 359 359 360 360 === 4.2.9 Time Zones === 361 361 ... ... @@ -382,21 +382,25 @@ 382 382 383 383 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: 384 384 385 - >(% style="font-size:18px" %)<Series REF_PERIODStartTime="2000-01-01T00:00:00" REF_PERIOD="P2M"/>436 +<Series REF_PERIODStartTime="2000-01-01T00:00:00" REF_PERIOD="P2M"/> 386 386 387 387 can now be represented with this: 388 388 389 - >(% style="font-size:18px" %)<Series REF_PERIOD="2000-01-01T00:00:00/P2M"/>440 +<Series REF_PERIOD="2000-01-01T00:00:00/P2M"/> 390 390 391 391 === 4.2.11 Notes on Formats === 392 392 393 393 There is no ambiguity in these formats so that for any given value of time, the category of the period (and thus the intended time period range) is always clear. It should also be noted that by utilizing the ISO 8601 format, and a format loosely based on it for the report periods, the values of time can easily be sorted chronologically without additional parsing. 394 394 395 -=== 4.2.12 Effect on Time Ranges === 446 +1. 447 +11. 448 +111. Effect on Time Ranges 396 396 397 397 All SDMX-ML data messages are capable of functioning in a manner similar to SDMXEDI if the Dimension at the observation level is time: the time period for the first observation can be stated and the rest of the observations can omit the time value as it can be derived from the start time and the frequency. Since the frequency can be determined based on the actual format of the time value for everything but distinct points in time and time ranges, this makes is even simpler to process as the interval between time ranges is known directly from the time value. 398 398 399 -=== 4.2.13 Time in Query Messages === 452 +1. 453 +11. 454 +111. Time in Query Messages 400 400 401 401 When querying for time values, the value of a time parameter can be provided as any of the Observational Time Period formats and must be paired with an operator. This section will detail how systems processing query messages should interpret these parameters. 402 402 ... ... @@ -450,11 +450,9 @@ 450 450 * 2010-M07 or later (any reporting year start day) 451 451 * 2010-W27 or later (reporting year start day ~-~-01-01)^^5^^ 452 452 * 2010-D182 or later (reporting year start day ~-~-01-01) 453 -* 2010-W28 or later (reporting year start day ~-~-07-01)^^6^^ 454 -* 2010-D185or later(reportingyear start day ~-~-07-01)508 +* 2010-W28 or later (reporting year start day ~-~-07-01)^^6^^ • 2010-D185 or later (reporting year start day ~-~-07-01) 509 +*1. Versioning 455 455 456 -== 4.3 Versioning == 457 - 458 458 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". 459 459 460 460 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 ... ... @@ -463,13 +463,17 @@ 463 463 464 464 ‘1.0’. 465 465 466 -=== 4.3.1 Non-versioned artefacts === 519 +1. 520 +11. 521 +111. Non-versioned artefacts 467 467 468 468 Indeed, some use cases do not need or are incompatible with versioning for some or all their structural artefacts, such as the Agency, Data Providers, Metadata Providers and Data Consumer Schemes. These artefacts follow the legacy versioning, with a fixed version set to ‘1.0’. 469 469 470 470 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. 471 471 472 -=== 4.3.2 Semantically versioned artefacts === 527 +1. 528 +11. 529 +111. Semantically versioned artefacts 473 473 474 474 Since the purpose of SDMX versioning is to allow communicating the structural artefact changes to data exchange partners and connected systems, SDMX 3.0 offers Semantic Versioning (aka SemVer) with a clear and unambiguous syntax to all semantically versioned SDMX 3.0 structural artefacts. Semantic versioning will thus better respond to situations where the SDMX standard itself is the only structural contract between data providers and data consumers and where changes in structures can only be communicated through the version number increases. 475 475 ... ... @@ -493,13 +493,17 @@ 493 493 494 494 The production versions of identifiable artefacts are assumed stable, i.e., they do not have an EXTENSION. This is because once in production, an artefact cannot change in any way, or it must change the version. For cases where an artefact is not static, like during the drafting, the version must indicate this by including an EXTENSION. Draft artefacts should not be used outside of a specific system designed to accommodate them. For most purposes, all artefacts should become stable before being used in production. 495 495 496 -=== 4.3.3 Legacy-versioned artefacts === 553 +1. 554 +11. 555 +111. Legacy-versioned artefacts 497 497 498 498 Organisations wishing to keep a maximum of backwards compatibility with existing implementations can continue using the previous 2-digit convention for version numbers (MAJOR.MINOR) as in the past, such as '2.3', but without the ‘isFinal’ property. The new SDMX 3.0 standard does not add any strict rules or guarantees about changes in those artefacts, since the legacy versioning rules were rather loose and non-binding, including the meaning of the ‘isFinal’ property, and their implementations were varying. 499 499 500 500 In order to make artefacts immutable or changes truly predictable, a move to the new semantic versioning syntax is required. 501 501 502 -=== 4.3.4 Dependency management and references === 561 +1. 562 +11. 563 +111. Dependency management and references 503 503 504 504 New flexible dependency specifications with wildcarding allow for easier data model maintenance and enhancements for semantically versioned SDMX artefacts. This allows implementing a smart referencing mechanism, whereby an artefact may reference: 505 505 ... ... @@ -528,7 +528,8 @@ 528 528 529 529 Full details can be found in the SDMX RESTful web services specification. 530 530 531 -== 4.4 Structural Metadata Querying Best Practices == 592 +1. 593 +11. Structural Metadata Querying Best Practices 532 532 533 533 When querying for structural metadata, the ability to state how references should be resolved is quite powerful. However, this mechanism is not always necessary and can create an undue burden on the systems processing the queries if it is not used properly. 534 534 ... ... @@ -536,6 +536,7 @@ 536 536 537 537 When the referenced object is not known, then the reference resolution mechanism could be used. For example, suppose one wanted to find all category schemes and the related categorisations for a given maintenance agency. In this case, one could query for the category scheme by the maintenance agency and specify that parent and sibling references should be resolved. This would result in the categorisations which reference the categories in the matched schemes to be returned, as well as the object which they categorise. 538 538 601 + 539 539 ---- 540 540 541 541 [[~[1~]>>path:#_ftnref1]] Regular expressions, as specified in [[W3C XML Schema Definition Language (XSD)>>url:https://www.w3.org/TR/xmlschema11-2/]][[ >>url:https://www.w3.org/TR/xmlschema11-2/]][[1.1 Part 2: Datatypes>>url:https://www.w3.org/TR/xmlschema11-2/]][[.>>url:https://www.w3.org/TR/xmlschema11-2/]] ... ... @@ -546,5 +546,4 @@ 546 546 547 547 [[~[4~]>>path:#_ftnref4]] The rules for adding durations to a date time are described in the W3C XML Schema specification. See [[http:~~/~~/www.w3.org/TR/xmlschema>>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[->>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[2/#adding>>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[->>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[durations>>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[->>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[to>>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[dateTimes>>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]][[ >>url:http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes]]for further details. 548 548 549 - 550 -{{putFootnotes/}} 612 +