Changes for page 12 Validation and Transformation Language (VTL)

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

From 5.22 to 5.21 From 6.3 to 6.2

From version 6.2

edited by Helena
on 2025/05/16 12:28

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To version 5.22

edited by Helena
on 2025/05/16 08:59

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@@ -14,8 +14,10 @@
  The VTL language can be applied to SDMX artefacts by mapping the SDMX IM model artefacts to the model artefacts that VTL can manipulate{{footnote}}In this chapter, in order to distinguish VTL and SDMX model artefacts, the VTL ones are written in the Arial font while the SDMX ones in Courier New{{/footnote}}. Thus, the SDMX artefacts can be used in VTL as inputs and/or outputs of Transformations. It is important to be aware that the artefacts do not always have the same names in the SDMX and VTL IMs, nor do they always have the same meaning. The more evident example is given by the SDMX Dataset and the VTL "Data Set", which do not correspond one another: as a matter of fact, the VTL "Data Set" maps to the SDMX "Dataflow", while the SDMX "Dataset" has no explicit mapping to VTL (such an abstraction is not needed in the definition of VTL Transformations). A SDMX "Dataset", however, is an instance of a SDMX "Dataflow" and can be the artefact on which the VTL transformations are executed (i.e., the Transformations are defined on Dataflows and are applied to Dataflow instances that can be Datasets).
--The VTL programs (Transformation Schemes) are represented in SDMX through the TransformationScheme maintainable class which is composed of Transformation (nameable artefact). Each Transformation assigns the outcome of the evaluation of a VTL expression to a result.
++The VTL programs (Transformation Schemes) are represented in SDMX through the TransformationScheme maintainable class which is composed of
++Transformation (nameable artefact). Each Transformation assigns the outcome of the evaluation of a VTL expression to a result.
++
  This section does not explain the VTL language or any of the content published in the VTL guides. Rather, this is a description of how the VTL can be used in the SDMX context and applied to SDMX artefacts.
  == 12.2 References to SDMX artefacts from VTL statements ==
@@ -241,7 +241,7 @@
  AttributeRelationship is not specified (i.e. the DataAttribute does not depend on any DimensionComponent and therefore is at data set level), or if it refers to a set (or a group) of dimensions which does not include the MeasureDimension;
--*
++*
  ** Otherwise, if, according to the SDMX AttributeRelationship, the values of the DataAttribute depend on the MeasureDimension, the SDMX DataAttribute is mapped to one VTL Attribute for each possible Code of the SDMX MeasureDimension. By default, the names of the VTL Attributes are obtained by concatenating the name of the SDMX DataAttribute and the names of the correspondent Code of the MeasureDimension separated by underscore. For example, if the SDMX DataAttribute is named DA and the possible Codes of the SDMX MeasureDimension are named C1, C2, …, Cn, then the corresponding VTL Attributes will be named DA_C1, DA_C2, …, DA_Cn (if different names are desired, they can be achieved afterwards by renaming the Attributes through VTL operators).
  ** Like in the Basic mapping, the resulting VTL Attributes are considered as dependent on all the VTL identifiers (i.e. "at data point / observation level"), because VTL does not have the SDMX notion of Attribute Relationship.
@@ -578,10 +578,8 @@
  Therefore, it is important to be aware that some VTL operations (for example the binary operations at data set level) are consistent only if the components having the same names in the operated VTL Data Sets have also the same representation (i.e. the same Value Domain as for VTL). For example, it is possible to obtain correct results from the VTL expression
--DS_c := DS_a + DS_b (where DS_a, DS_b, DS_c are VTL Data Sets)
++DS_c := DS_a + DS_b (where DS_a, DS_b, DS_c are VTL Data Sets) if the matching components in DS_a and DS_b (e.g. ref_date, geo_area, sector …) refer to the same general representation. In simpler words, DS_a and DS_b must use the same values/codes (for ref_date, geo_area, sector … ), otherwise the relevant values would not match and the result of the operation would be wrong.
--if the matching components in DS_a and DS_b (e.g. ref_date, geo_area, sector …) refer to the same general representation. In simpler words, DS_a and DS_b must use the same values/codes (for ref_date, geo_area, sector … ), otherwise the relevant values would not match and the result of the operation would be wrong.
--
  As mentioned, the property above is not enforced by construction in SDMX, and different representations of the same Concept can be not compatible one another (for example, it may happen that geo_area is represented by ISO-alpha-3 codes in DS_a and by ISO alpha-2 codes in DS_b). Therefore, it will be up to the definer of VTL
  Transformations to ensure that the VTL expressions are consistent with the actual representations of the correspondent SDMX Concepts.
@@ -598,8 +598,7 @@
  [[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_e3df33ae.png||height="543" width="483"]]
--(% class="wikigeneratedid" id="HFigure222013VTLDataTypes" %)
--**Figure 22 – VTL Data Types**
++==== Figure 22 – VTL Data Types ====
  The VTL scalar types are in turn subdivided in basic scalar types, which are elementary (not defined in term of other data types) and Value Domain and Set scalar types, which are defined in terms of the basic scalar types.
@@ -606,12 +606,131 @@
  The VTL basic scalar types are listed below and follow a hierarchical structure in terms of supersets/subsets (e.g. "scalar" is the superset of all the basic scalar types):
--**Figure 23 – VTL Basic Scalar Types**
  (((
--
++//n//
++
++//a//
++
++//e//
++
++//l//
++
++//o//
++
++//o//
++
++//B//
++
++//n//
++
++//o//
++
++//i//
++
++//t//
++
++//a//
++
++//r//
++
++//u//
++
++//D//
++
++//d//
++
++//o//
++
++//i//
++
++//r//
++
++//e//
++
++//p//
++
++//_//
++
++//e//
++
++//m//
++
++//i//
++
++//T//
++
++//e//
++
++//t//
++
++//a//
++
++//D//
++
++//e//
++
++//m//
++
++//i//
++
++//T//
++
++//r//
++
++//e//
++
++//g//
++
++//e//
++
++//t//
++
++//n//
++
++//I//
++
++//r//
++
++//e//
++
++//b//
++
++//m//
++
++//u//
++
++//N//
++
++//g//
++
++//n//
++
++//i//
++
++//r//
++
++//t//
++
++//S//
++
++//r//
++
++//a//
++
++//l//
++
++//a//
++
++//c//
++
++//S//
++
++[[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_82d45833.gif||alt="Shape6" height="231" width="184"]]
  )))
++==== Figure 23 – VTL Basic Scalar Types ====
++
  === 12.4.2 VTL basic scalar types and SDMX data types ===
  The VTL assumes that a basic scalar type has a unique internal representation and can have more external representations.
@@ -634,159 +634,204 @@
  The following table describes the default mapping for converting from the SDMX data types to the VTL basic scalar types.
--(% style="width:823.294px" %)
--|(% style="width:509px" %)**SDMX data type (BasicComponentDataType)**|(% style="width:312px" %)**Default VTL basic scalar type**
--|(% style="width:509px" %)(((
++|SDMX data type (BasicComponentDataType)|Default VTL basic scalar type
++|(((
  String
++
  (string allowing any character)
--)))|(% style="width:312px" %)string
--|(% style="width:509px" %)(((
++)))|string
++|(((
  Alpha
++
  (string which only allows A-z)
--)))|(% style="width:312px" %)string
--|(% style="width:509px" %)(((
++)))|string
++|(((
  AlphaNumeric
++
  (string which only allows A-z and 0-9)
--)))|(% style="width:312px" %)string
--|(% style="width:509px" %)(((
++)))|string
++|(((
  Numeric
++
  (string which only allows 0-9, but is not numeric so that is can having leading zeros)
--)))|(% style="width:312px" %)string
--|(% style="width:509px" %)(((
++)))|string
++|(((
  BigInteger
++
  (corresponds to XML Schema xs:integer datatype; infinite set of integer values)
--)))|(% style="width:312px" %)integer
--|(% style="width:509px" %)(((
++)))|integer
++|(((
  Integer
--(corresponds to XML Schema xs:int datatype; between -2147483648 and +2147483647 (inclusive))
--)))|(% style="width:312px" %)integer
--|(% style="width:509px" %)(((
++
++(corresponds to XML Schema xs:int datatype; between -2147483648 and +2147483647
++
++(inclusive))
++)))|integer
++|(((
  Long
--(corresponds to XML Schema xs:long datatype; between -9223372036854775808 and +9223372036854775807 (inclusive))
--)))|(% style="width:312px" %)integer
--|(% style="width:509px" %)(((
++
++(corresponds to XML Schema xs:long datatype; between -9223372036854775808 and
++
+++9223372036854775807 (inclusive))
++)))|integer
++|(((
  Short
++
  (corresponds to XML Schema xs:short datatype; between -32768 and -32767 (inclusive))
--)))|(% style="width:312px" %)integer
--|(% style="width:509px" %)Decimal (corresponds to XML Schema xs:decimal datatype; subset of real numbers that can be represented as decimals)|(% style="width:312px" %)number
--|(% style="width:509px" %)(((
++)))|integer
++|Decimal (corresponds to XML Schema xs:decimal datatype; subset of real numbers that can be represented as decimals)|number
++|(((
  Float
++
  (corresponds to XML Schema xs:float datatype; patterned after the IEEE single-precision 32-bit floating point type)
--)))|(% style="width:312px" %)number
--|(% style="width:509px" %)(((
++)))|number
++|(((
  Double
++
  (corresponds to XML Schema xs:double datatype; patterned after the IEEE double-precision 64-bit floating point type)
--)))|(% style="width:312px" %)number
--|(% style="width:509px" %)(((
++)))|number
++|(((
  Boolean
--(corresponds to the XML Schema xs:boolean datatype; support the mathematical concept of binary-valued logic: {true, false})
--)))|(% style="width:312px" %)boolean
--(% style="width:822.294px" %)
--|(% colspan="2" style="width:507px" %)(((
++(corresponds to the XML Schema xs:boolean datatype; support the mathematical concept of
++
++binary-valued logic: {true, false})
++)))|boolean
++
++| |(% colspan="2" %)(((
  URI
++
  (corresponds to the XML Schema xs:anyURI; absolute or relative Uniform Resource Identifier Reference)
--)))|(% colspan="1" style="width:311px" %)string
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)string
++| |(% colspan="2" %)(((
  Count
++
  (an integer following a sequential pattern, increasing by 1 for each occurrence)
--)))|(% colspan="1" style="width:311px" %)integer
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)integer
++| |(% colspan="2" %)(((
  InclusiveValueRange
++
  (decimal number within a closed interval, whose bounds are specified in the SDMX representation by the facets minValue and maxValue)
--)))|(% colspan="1" style="width:311px" %)number
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)number
++| |(% colspan="2" %)(((
  ExclusiveValueRange
++
  (decimal number within an open interval, whose bounds are specified in the SDMX representation by the facets minValue and maxValue)
--)))|(% colspan="1" style="width:311px" %)number
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)number
++| |(% colspan="2" %)(((
  Incremental
++
  (decimal number the increased by a specific interval (defined by the interval facet), which is typically enforced outside of the XML validation)
--)))|(% colspan="1" style="width:311px" %)number
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)number
++| |(% colspan="2" %)(((
  ObservationalTimePeriod
++
  (superset of StandardTimePeriod and TimeRange)
--)))|(% colspan="1" style="width:311px" %)time
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)time
++| |(% colspan="2" %)(((
  StandardTimePeriod
--(superset of BasicTimePeriod and ReportingTimePeriod)
--)))|(% colspan="1" style="width:311px" %)time
--|(% colspan="2" style="width:507px" %)(((
++
++(superset of BasicTimePeriod and
++
++ReportingTimePeriod)
++)))|(% colspan="2" %)time
++| |(% colspan="2" %)(((
  BasicTimePeriod
++
  (superset of GregorianTimePeriod and DateTime)
--)))|(% colspan="1" style="width:311px" %)date
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)date
++| |(% colspan="2" %)(((
  GregorianTimePeriod
++
  (superset of GregorianYear, GregorianYearMonth, and GregorianDay)
--)))|(% colspan="1" style="width:311px" %)date
--|(% colspan="2" style="width:507px" %)GregorianYear (YYYY)|(% colspan="1" style="width:311px" %)date
--|(% colspan="2" style="width:507px" %)GregorianYearMonth / GregorianMonth (YYYY-MM)|(% colspan="1" style="width:311px" %)date
--|(% colspan="2" style="width:507px" %)GregorianDay (YYYY-MM-DD)|(% colspan="1" style="width:311px" %)date
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)date
++| |(% colspan="2" %)GregorianYear (YYYY)|(% colspan="2" %)date
++| |(% colspan="2" %)GregorianYearMonth / GregorianMonth (YYYY-MM)|(% colspan="2" %)date
++| |(% colspan="2" %)GregorianDay (YYYY-MM-DD)|(% colspan="2" %)date
++| |(% colspan="2" %)(((
  ReportingTimePeriod
--(superset of RepostingYear, ReportingSemester, ReportingTrimester, ReportingQuarter, ReportingMonth, ReportingWeek, ReportingDay)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)(((
++
++(superset of RepostingYear, ReportingSemester,
++
++ReportingTrimester, ReportingQuarter,
++
++ReportingMonth, ReportingWeek, ReportingDay)
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)(((
  ReportingYear
++
  (YYYY-A1 – 1 year period)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)(((
  ReportingSemester
++
  (YYYY-Ss – 6 month period)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)(((
  ReportingTrimester
++
  (YYYY-Tt – 4 month period)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)(((
  ReportingQuarter
++
  (YYYY-Qq – 3 month period)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)(((
  ReportingMonth
++
  (YYYY-Mmm – 1 month period)
--)))|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="2" style="width:507px" %)ReportingWeek|(% colspan="1" style="width:311px" %)time_period
--|(% colspan="1" style="width:507px" %)(YYYY-Www – 7 day period; following ISO 8601 definition of a week in a year)|(% colspan="2" style="width:312px" %)
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period
++| |(% colspan="2" %)ReportingWeek|(% colspan="2" %)time_period
++| |(% colspan="2" %) |(% colspan="2" %)
++| |(% colspan="2" %) |(% colspan="2" %)
++|(% colspan="2" %)(YYYY-Www – 7 day period; following ISO 8601 definition of a week in a year)|(% colspan="2" %) |
++|(% colspan="2" %)(((
  ReportingDay
++
  (YYYY-Dddd – 1 day period)
--)))|(% colspan="2" style="width:312px" %)time_period
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)time_period|
++|(% colspan="2" %)(((
  DateTime
++
  (YYYY-MM-DDThh:mm:ss)
--)))|(% colspan="2" style="width:312px" %)date
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)date|
++|(% colspan="2" %)(((
  TimeRange
++
  (YYYY-MM-DD(Thh:mm:ss)?/<duration>)
--)))|(% colspan="2" style="width:312px" %)time
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)time|
++|(% colspan="2" %)(((
  Month
++
  (~-~-MM; speicifies a month independent of a year; e.g. February is black history month in the United States)
--)))|(% colspan="2" style="width:312px" %)string
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)string|
++|(% colspan="2" %)(((
  MonthDay
++
  (~-~-MM-DD; specifies a day within a month independent of a year; e.g. Christmas is December 25^^th^^; used to specify reporting year start day)
--)))|(% colspan="2" style="width:312px" %)string
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)string|
++|(% colspan="2" %)(((
  Day
++
  (~-~--DD; specifies a day independent of a month or year; e.g. the 15^^th^^ is payday)
--)))|(% colspan="2" style="width:312px" %)string
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)string|
++|(% colspan="2" %)(((
  Time
++
  (hh:mm:ss; time independent of a date; e.g. coffee break is at 10:00 AM)
--)))|(% colspan="2" style="width:312px" %)string
--|(% colspan="1" style="width:507px" %)(((
++)))|(% colspan="2" %)string|
++|(% colspan="2" %)(((
  Duration
++
  (corresponds to XML Schema xs:duration datatype)
--)))|(% colspan="2" style="width:312px" %)duration
--|(% colspan="1" style="width:507px" %)XHTML|(% colspan="2" style="width:312px" %)Metadata type – not applicable
--|(% colspan="1" style="width:507px" %)KeyValues|(% colspan="2" style="width:312px" %)Metadata type – not applicable
--|(% colspan="1" style="width:507px" %)IdentifiableReference|(% colspan="2" style="width:312px" %)Metadata type – not applicable
--|(% colspan="1" style="width:507px" %)DataSetReference|(% colspan="2" style="width:312px" %)Metadata type – not applicable
++)))|(% colspan="2" %)duration|
++|(% colspan="2" %)XHTML|(% colspan="2" %)Metadata type – not applicable|
++|(% colspan="2" %)KeyValues|(% colspan="2" %)Metadata type – not applicable|
++|(% colspan="2" %)IdentifiableReference|(% colspan="2" %)Metadata type – not applicable|
++|(% colspan="2" %)DataSetReference|(% colspan="2" %)Metadata type – not applicable|
--(% class="wikigeneratedid" id="HFigure142013MappingsfromSDMXdatatypestoVTLBasicScalarTypes" %)
--**Figure 14 – Mappings from SDMX data types to VTL Basic Scalar Types**
++==== Figure 14 – Mappings from SDMX data types to VTL Basic Scalar Types ====
  When VTL takes in input SDMX artefacts, it is assumed that a type conversion according to the table above always happens. In case a different VTL basic scalar type is desired, it can be achieved in the VTL program taking in input the default VTL basic scalar type above and applying to it the VTL type conversion features (see the implicit and explicit type conversion and the "cast" operator in the VTL Reference Manual).
@@ -794,32 +794,39 @@
  The following table describes the default conversion from the VTL basic scalar types to the SDMX data types .
--(% style="width:1073.29px" %)
--|(% style="width:207px" %)(((
--**VTL basic scalar type**
--)))|(% style="width:462px" %)(((
--**Default SDMX data type (BasicComponentDataType)**
--)))|(% style="width:402px" %)**Default output format**
--|(% style="width:207px" %)String|(% style="width:462px" %)String|(% style="width:402px" %)Like XML (xs:string)
--|(% style="width:207px" %)Number|(% style="width:462px" %)Float|(% style="width:402px" %)Like XML (xs:float)
--|(% style="width:207px" %)Integer|(% style="width:462px" %)Integer|(% style="width:402px" %)Like XML (xs:int)
--|(% style="width:207px" %)Date|(% style="width:462px" %)DateTime|(% style="width:402px" %)YYYY-MM-DDT00:00:00Z
--|(% style="width:207px" %)Time|(% style="width:462px" %)StandardTimePeriod|(% style="width:402px" %)<date>/<date> (as defined above)
--|(% style="width:207px" %)time_period|(% style="width:462px" %)(((
++|(((
++VTL basic
++
++scalar type
++)))|(((
++Default SDMX data type
++
++(BasicComponentDataType
++
++)
++)))|Default output format
++|String|String|Like XML (xs:string)
++|Number|Float|Like XML (xs:float)
++|Integer|Integer|Like XML (xs:int)
++|Date|DateTime|YYYY-MM-DDT00:00:00Z
++|Time|StandardTimePeriod|<date>/<date> (as defined above)
++|time_period|(((
  ReportingTimePeriod
++
  (StandardReportingPeriod)
--)))|(% style="width:402px" %)(((
++)))|(((
  YYYY-Pppp
++
  (according to SDMX )
  )))
--|(% style="width:207px" %)Duration|(% style="width:462px" %)Duration|(% style="width:402px" %)(((
++|Duration|Duration|(((
  Like XML (xs:duration)
++
  PnYnMnDTnHnMnS
  )))
--|(% style="width:207px" %)Boolean|(% style="width:462px" %)Boolean|(% style="width:402px" %)Like XML (xs:boolean) with the values "true" or "false"
++|Boolean|Boolean|Like XML (xs:boolean) with the values "true" or "false"
--(% class="wikigeneratedid" id="HFigure142013MappingsfromSDMXdatatypestoVTLBasicScalarTypes-1" %)
--**Figure 14 – Mappings from SDMX data types to VTL Basic Scalar Types**
++==== Figure 14 – Mappings from SDMX data types to VTL Basic Scalar Types ====
  In case a different default conversion is desired, it can be achieved through the CustomTypeScheme and CustomType artefacts (see also the section Transformations and Expressions of the SDMX information model).
@@ -873,7 +873,7 @@
  |N|fixed number of digits used in the preceding textual representation of the month or the day
  | |
--The default conversion, either standard or customized, can be used to deduce automatically the representation of the components of the result of a VTL Transformation. In alternative, the representation of the resulting SDMX Dataflow can be given explicitly by providing its DataStructureDefinition. In other words, the representation specified in the DSD, if available, overrides any default conversion{{footnote}}The representation given in the DSD should obviously be compatible with the VTL data type.{{/footnote}}.
++The default conversion, either standard or customized, can be used to deduce automatically the representation of the components of the result of a VTL Transformation. In alternative, the representation of the resulting SDMX Dataflow can be given explicitly by providing its DataStructureDefinition. In other words, the representation specified in the DSD, if available, overrides any default conversion^^[[(% class="wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink wikiinternallink" %)^^42^^>>path:#sdfootnote42sym||name="sdfootnote42anc"]](%%)^^.
  === 12.4.5 Null Values ===
@@ -891,8 +891,10 @@
  A different format can be specified in the attribute "vtlLiteralFormat" of the CustomType artefact (see also the section Transformations and Expressions of the SDMX information model).
--Like in the case of the conversion of NULLs described in the previous paragraph, the overriding assumption is applied, for a certain VTL basic scalar type, if a value is found for the vtlLiteralFormat attribute of the CustomType of such VTL basic scalar type. The overriding assumption is applied for all the literals of a related VTL TransformationScheme.
++Like in the case of the conversion of NULLs described in the previous paragraph, the overriding assumption is applied, for a certain VTL basic scalar type, if a value is found for the vtlLiteralFormat attribute of the CustomType of such VTL basic scalar type. The overriding assumption is applied for all the literals of a related VTL
++TransformationScheme.
++
  In case a literal is operand of a VTL Cast operation, the format specified in the Cast overrides all the possible otherwise specified formats.
  {{putFootnotes/}}