Changes for page 5 Data Structure Definition and Dataset

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

From 8.6 to 8.5 From 9.4 to 9.3

From version 9.3

edited by Helena
on 2025/05/16 23:02

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To version 8.6

edited by Helena
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@@ -4,15 +4,15 @@
  == 5.1 Introduction ==
--The DataStructureDefiniton is the class name for a structure definition for data. Some organisations know this type of definition as a “Key Family” and so the two names are synonymous. The term [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] (also referred to as [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]]) is used in this specification.
++The DataStructureDefiniton is the class name for a structure definition for data. Some organisations know this type of definition as a “Key Family” and so the two names are synonymous. The term Data Structure Definition (also referred to as DSD) is used in this specification.
--Many of the constructs in this layer of the model inherit from the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] Base Layer. Therefore, it is necessary to study both the inheritance and the relationship diagrams to understand the functionality of individual packages. In simple sub models these are shown in the same diagram but are omitted from the more complex sub models for the sake of clarity. In these cases, the inheritance diagram below shows the full inheritance tree for the classes concerned with data structure definitions.
++Many of the constructs in this layer of the model inherit from the SDMX Base Layer. Therefore, it is necessary to study both the inheritance and the relationship diagrams to understand the functionality of individual packages. In simple sub models these are shown in the same diagram but are omitted from the more complex sub models for the sake of clarity. In these cases, the inheritance diagram below shows the full inheritance tree for the classes concerned with data structure definitions.
--There are very few additional classes in this sub model other than those shown in the inheritance diagram below. In other words, the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] Base gives most of the structure of this sub model both in terms of associations and in terms of [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]]. The relationship diagrams shown in this section show clearly when these associations are inherited from the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] Base (see the Appendix “A Short Guide to UML in the [[SDMX Information Model>>doc:xwiki:Glossary.SDMX Information Model.WebHome]]” to see the diagrammatic notation used to depict this).
++There are very few additional classes in this sub model other than those shown in the inheritance diagram below. In other words, the SDMX Base gives most of the structure of this sub model both in terms of associations and in terms of attributes. The relationship diagrams shown in this section show clearly when these associations are inherited from the SDMX Base (see the Appendix “A Short Guide to UML in the SDMX Information Model” to see the diagrammatic notation used to depict this).
--The actual [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] Base construct from which the concrete classes inherit depends upon the requirements of the class for:
++The actual SDMX Base construct from which the concrete classes inherit depends upon the requirements of the class for:
--[[Annotation>>doc:xwiki:Glossary.Annotation.WebHome]] – //AnnotableArtefact//
++Annotation – //AnnotableArtefact//
  Identification – //IdentifiableArtefact//
  Naming – //NameableArtefact//
  Versioning – //VersionableArtefact//
@@ -30,29 +30,29 @@
  ==== 5.2.2.1 Narrative ====
--Those classes in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] metamodel which require [[annotations>>doc:xwiki:Glossary.Annotation.WebHome]] inherit from //AnnotableArtefact//. These are:
++Those classes in the SDMX metamodel which require annotations inherit from //AnnotableArtefact//. These are:
  //IdentifiableArtefact
--[[DataSet>>doc:xwiki:Glossary.Data set.WebHome]]
++DataSet
  Key// (and therefore //SeriesKey// and //GroupKey//)
  //Observation//
--Those classes in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] metamodel which require [[annotations>>doc:xwiki:Glossary.Annotation.WebHome]] and global identity are derived from //IdentifiableArtefact//. These are:
++Those classes in the SDMX metamodel which require annotations and global identity are derived from //IdentifiableArtefact//. These are:
  //NameableArtefact
  ComponentList
--[[Component>>doc:xwiki:Glossary.Component.WebHome]]//
++Component//
--Those classes in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] metamodel which require [[annotations>>doc:xwiki:Glossary.Annotation.WebHome]], global identity, multilingual name and multilingual description are derived from //NameableArtefact//. These are:
++Those classes in the SDMX metamodel which require annotations, global identity, multilingual name and multilingual description are derived from //NameableArtefact//. These are:
  //VersionableArtefact
  Item//
--The classes in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] metamodel which require [[annotations>>doc:xwiki:Glossary.Annotation.WebHome]], global identity, multilingual name and multilingual description, and versioning are derived from //VersionableArtefact//. These are:
++The classes in the SDMX metamodel which require annotations, global identity, multilingual name and multilingual description, and versioning are derived from //VersionableArtefact//. These are:
  //MaintainableArtefact//
--Abstract classes which represent information that is maintained by [[Maintenance Agencies>>doc:xwiki:Glossary.Maintenance agency.WebHome]] all inherit from //MaintainableArtefact//, they also inherit all the features of a //VersionableArtefact//, and are:
++Abstract classes which represent information that is maintained by Maintenance Agencies all inherit from //MaintainableArtefact//, they also inherit all the features of a //VersionableArtefact//, and are:
  //StructureUsage
  Structure
@@ -60,29 +60,29 @@
  All the above classes are abstract. The key to understanding the class diagrams presented in this section are the concrete classes that inherit from these abstract classes.
--Those concrete classes in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] [[Data Structure Definition>>doc:xwiki:Glossary.Data structure definition.WebHome]] and [[Dataset>>doc:xwiki:Glossary.Data set.WebHome]] packages of the metamodel which require to be maintained by Agencies all inherit (via other abstract classes) from //MaintainableArtefact//, these are:
++Those concrete classes in the SDMX Data Structure Definition and Dataset packages of the metamodel which require to be maintained by Agencies all inherit (via other abstract classes) from //MaintainableArtefact//, these are:
  Dataflow
  DataStructureDefinition
--The [[component>>doc:xwiki:Glossary.Component.WebHome]] structures that are lists of lists, inherit directly from //Structure//. A //Structure// contains several lists of [[components>>doc:xwiki:Glossary.Component.WebHome]]. The concrete class that inherits from //Structure// is:
++The component structures that are lists of lists, inherit directly from //Structure//. A //Structure// contains several lists of components. The concrete class that inherits from //Structure// is:
  DataStructureDefinition
--A DataStructureDefinition contains a list of [[dimensions>>doc:xwiki:Glossary.Dimension.WebHome]], a list of [[measures>>doc:xwiki:Glossary.Measure.WebHome]] and a list of attributes.
++A DataStructureDefinition contains a list of dimensions, a list of measures and a list of attributes.
  The concrete classes which inherit from //ComponentList// and are subcomponents of the DataStructureDefinition are:
--DimensionDescriptor – content is [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] and TimeDimension
--DimensionGroupDescriptor – content is an association to [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]], TimeDimension
++DimensionDescriptor – content is Dimension and TimeDimension
++DimensionGroupDescriptor – content is an association to Dimension, TimeDimension
  MeasureDescriptor – content is Measure
  AttributeDescriptor – content is DataAttribute and an association to MetadataAttribute
--The classes that inherit from //[[Component>>doc:xwiki:Glossary.Component.WebHome]]// are:
++The classes that inherit from //Component// are:
  Measure
--//DimensionComponent// and thereby its sub classes of [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] and TimeDimension
++//DimensionComponent// and thereby its sub classes of Dimension and TimeDimension
  //Attribute// and thereby its sub classes of DataAttribute and MetadataAttribute
  The concrete classes identified above are the majority of the classes required to define the metamodel for the DataStructureDefinition. The diagrams and explanations in the rest of this section show how these concrete classes are related in order to support the functionality required.
@@ -99,42 +99,42 @@
  ==== 5.3.2.1 Narrative ====
--A DataStructureDefinition defines the [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]], TimeDimension, DataAttributes, and [[Measures>>doc:xwiki:Glossary.Measure.WebHome]], and associated [[Representations>>doc:xwiki:Glossary.Representation.WebHome]], that comprise the valid structure of data and related [[attributes>>doc:xwiki:Glossary.Attribute.WebHome]] that are contained in a [[DataSet>>doc:xwiki:Glossary.Data set.WebHome]], which is defined by a [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]]. In addition, a DataStructureDefinition may be related to one MetadataStructureDefinition, in order to use the latter’s MetadataAttributes, by relating them to other //[[Components>>doc:xwiki:Glossary.Component.WebHome]]// within the [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]], as explained below.
++A DataStructureDefinition defines the Dimensions, TimeDimension, DataAttributes, and Measures, and associated Representations, that comprise the valid structure of data and related attributes that are contained in a DataSet, which is defined by a Dataflow. In addition, a DataStructureDefinition may be related to one MetadataStructureDefinition, in order to use the latter’s MetadataAttributes, by relating them to other //Components// within the DSD, as explained below.
--The [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]] may also have additional metadata attached that define qualitative information and (% style="color:#2ecc71" %)Constraints(%%) on the use of the DataStructureDefinition such as the subset of [[Codes>>doc:xwiki:Glossary.Code.WebHome]] used in a [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] (this is covered later in this document – see sections “(% style="color:#2ecc71" %)Constraints(%%)” and “Data Provisioning”). Each [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]] has a maximum of one DataStructureDefinition specified which defines the structure of any [[DataSets>>doc:xwiki:Glossary.Data set.WebHome]] to be reported/disseminated.
++The Dataflow may also have additional metadata attached that define qualitative information and Constraints on the use of the DataStructureDefinition such as the subset of Codes used in a Dimension (this is covered later in this document – see sections “Constraints” and “Data Provisioning”). Each Dataflow has a maximum of one DataStructureDefinition specified which defines the structure of any DataSets to be reported/disseminated.
--There are two types of [[dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] each having a common association to (% style="color:#2ecc71" %)Concept(%%):
++There are two types of dimensions each having a common association to Concept:
--* [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]]
++* Dimension
  * TimeDimension
--Note that DimensionComponent can be any or all its sub classes i.e., [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]], TimeDimension.
++Note that DimensionComponent can be any or all its sub classes i.e., Dimension, TimeDimension.
--The //DimensionComponent//, DataAttribute, MetadataAttribute and [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] link to the (% style="color:#2ecc71" %)Concept(%%) that defines its name and semantic (/conceptIdentity association to (% style="color:#2ecc71" %)Concept(%%)). The DataAttribute, [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] (but not TimeDimension) and [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] can optionally have a +conceptRole association with a (% style="color:#2ecc71" %)Concept(%%) that identifies its role in the DataStructureDefinition, or one of the standard pre-defined roles, i.e., those published in "GUIDELINES FOR [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] (% style="color:#2ecc71" %)CONCEPT(%%) ROLES" by the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] SWG. The use of these roles is to enable applications to process the data in a meaningful way (e.g., relating a [[dimension>>doc:xwiki:Glossary.Dimension.WebHome]] value to a mapping vector). It is expected, beyond the standard roles published by the SWG, that communities (such as the official statistics community) will harmonise such roles within their community so that data can be exchanged and shared in a meaningful way within that community.
++The //DimensionComponent//, DataAttribute, MetadataAttribute and Measure link to the Concept that defines its name and semantic (/conceptIdentity association to Concept). The DataAttribute, Dimension (but not TimeDimension) and Measure can optionally have a +conceptRole association with a Concept that identifies its role in the DataStructureDefinition, or one of the standard pre-defined roles, i.e., those published in "GUIDELINES FOR SDMX CONCEPT ROLES" by the SDMX SWG. The use of these roles is to enable applications to process the data in a meaningful way (e.g., relating a dimension value to a mapping vector). It is expected, beyond the standard roles published by the SWG, that communities (such as the official statistics community) will harmonise such roles within their community so that data can be exchanged and shared in a meaningful way within that community.
--The valid values for a //DimensionComponent//, [[Measure>>doc:xwiki:Glossary.Measure.WebHome]], DataAttribute or MetadataAttribute, when used in this DataStructureDefinition, are defined by the [[Representation>>doc:xwiki:Glossary.Representation.WebHome]]. This [[Representation>>doc:xwiki:Glossary.Representation.WebHome]] is taken from the (% style="color:#2ecc71" %)Concept(%%) definition (coreRepresentation) unless it is overridden in this DataStructureDefinition (localRepresentation) – see Figure 28. Note also that TimeDimension is constrained to specific FacetValueTypes. Moreover, the [[Representations>>doc:xwiki:Glossary.Representation.WebHome]] of MetadataAttributes are specified in the corresponding MetadataStructureDefinition, linked by the DataStructureDefinition.
++The valid values for a //DimensionComponent//, Measure, DataAttribute or MetadataAttribute, when used in this DataStructureDefinition, are defined by the Representation. This Representation is taken from the Concept definition (coreRepresentation) unless it is overridden in this DataStructureDefinition (localRepresentation) – see Figure 28. Note also that TimeDimension is constrained to specific FacetValueTypes. Moreover, the Representations of MetadataAttributes are specified in the corresponding MetadataStructureDefinition, linked by the DataStructureDefinition.
--There will always be a DimensionDescriptor grouping that identifies all of the [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] comprising the full key. Together the [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] specify the key of an Observation.
++There will always be a DimensionDescriptor grouping that identifies all of the Dimension comprising the full key. Together the Dimensions specify the key of an Observation.
--The //DimensionComponent// can optionally be grouped by multiple GroupDimensionDescriptors each of which identifies the group of [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] that can form a partial key. The GroupDimensionDescriptor must be identified (GroupDimensionDescriptor.id) and this is used in the GroupKey of the [[DataSet>>doc:xwiki:Glossary.Data set.WebHome]] to declare which DataAttributes or MetadataAttributes are reported at this group (% style="color:#2ecc71" %)level(%%) in the [[DataSet>>doc:xwiki:Glossary.Data set.WebHome]].
++The //DimensionComponent// can optionally be grouped by multiple GroupDimensionDescriptors each of which identifies the group of Dimensions that can form a partial key. The GroupDimensionDescriptor must be identified (GroupDimensionDescriptor.id) and this is used in the GroupKey of the DataSet to declare which DataAttributes or MetadataAttributes are reported at this group level in the DataSet.
--There can be a maximum of one TimeDimension specified in the DimensionDescriptor. The TimeDimension is used to specify the (% style="color:#2ecc71" %)Concept(%%) used to convey the [[time period>>doc:xwiki:Glossary.Time period.WebHome]] of the observation in a [[data set>>doc:xwiki:Glossary.Data set.WebHome]]. The TimeDimension must contain a valid [[representation>>doc:xwiki:Glossary.Representation.WebHome]] of time and cannot be coded.
++There can be a maximum of one TimeDimension specified in the DimensionDescriptor. The TimeDimension is used to specify the Concept used to convey the time period of the observation in a data set. The TimeDimension must contain a valid representation of time and cannot be coded.
--here can be one or more [[Measures>>doc:xwiki:Glossary.Measure.WebHome]] under the MeasureDescriptor. [[Measures>>doc:xwiki:Glossary.Measure.WebHome]] represent the observable phenomena. Each [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] may have a valid [[representation>>doc:xwiki:Glossary.Representation.WebHome]], a maxOccurs [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] limiting the maximum number of values per [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] (which may be set to 'unbounded' for unlimited occurrences), as well as a minOccurs [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]], indicating the minimum required number of values, when the [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] is reported. If minOccurs or maxOccurs are omitted (they both default to ‘1’), the [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] is considered to take a single value; otherwise, it is an array. Moreover, the usage [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] indicates whether a [[Measure>>doc:xwiki:Glossary.Measure.WebHome]] must be reported or not, by the corresponding values: mandatory or optional.
++here can be one or more Measures under the MeasureDescriptor. Measures represent the observable phenomena. Each Measure may have a valid representation, a maxOccurs attribute limiting the maximum number of values per Measure (which may be set to 'unbounded' for unlimited occurrences), as well as a minOccurs attribute, indicating the minimum required number of values, when the Measure is reported. If minOccurs or maxOccurs are omitted (they both default to ‘1’), the Measure is considered to take a single value; otherwise, it is an array. Moreover, the usage attribute indicates whether a Measure must be reported or not, by the corresponding values: mandatory or optional.
--The AttributeDescriptor may contain one or more //[[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]]//s, i.e., at least one DataAttribute definition or one MetadataAttribute reference.
++The AttributeDescriptor may contain one or more //Attribute//s, i.e., at least one DataAttribute definition or one MetadataAttribute reference.
--The DataAttribute defines a characteristic of data that are collected or disseminated and is grouped in the DataStructureDefinition by a single AttributeDescriptor. The DataAttribute can be indicated if it must be reported or not, by the corresponding value of the usage [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]]: i.e., mandatory or optional. The property minOccurs specifies the minimum number of array values to be included when the DataAttribute is reported. Moreover, a maxOccurs [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] indicates whether the DataAttribute may need to report more than one values, i.e., an array of values. The DataAttribute may play a specific role in the structure and this is specified by the +role association to the (% style="color:#2ecc71" %)Concept(%%) that identifies its role.
++The DataAttribute defines a characteristic of data that are collected or disseminated and is grouped in the DataStructureDefinition by a single AttributeDescriptor. The DataAttribute can be indicated if it must be reported or not, by the corresponding value of the usage attribute: i.e., mandatory or optional. The property minOccurs specifies the minimum number of array values to be included when the DataAttribute is reported. Moreover, a maxOccurs attribute indicates whether the DataAttribute may need to report more than one values, i.e., an array of values. The DataAttribute may play a specific role in the structure and this is specified by the +role association to the Concept that identifies its role.
--The MetadataAttribute defines [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] that may be collected or disseminated and is grouped together with DataAttribute under the AttributeDescriptor.
++The MetadataAttribute defines reference metadata that may be collected or disseminated and is grouped together with DataAttribute under the AttributeDescriptor.
--A DataAttribute or a MetadataAttribute (i.e., an //AttributeComponent//) is specified as being +relatedTo an AttributeRelationship, which defines the constructs to which the //AttributeComponent// is to be reported within a //[[DataSet>>doc:xwiki:Glossary.Data set.WebHome]]//. An //AttributeComponent// can be specified as being related to one of the following [[artefacts>>doc:xwiki:Glossary.Artefact.WebHome]]:
++A DataAttribute or a MetadataAttribute (i.e., an //AttributeComponent//) is specified as being +relatedTo an AttributeRelationship, which defines the constructs to which the //AttributeComponent// is to be reported within a //DataSet//. An //AttributeComponent// can be specified as being related to one of the following artefacts:
--* All data within the [[dataset>>doc:xwiki:Glossary.Data set.WebHome]] (DataflowRelationship) – this is equivalent to attaching an [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] to all data within the [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]].
--* [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] or set of [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] (DimensionRelationship)
--* Set of [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] specified by a GroupKey (GroupRelationship – this is retained for compatibility reasons – or +groupKey of the DimensionRelationship)
++* All data within the dataset (DataflowRelationship) – this is equivalent to attaching an Attribute to all data within the Dataflow.
++* Dimension or set of Dimensions (DimensionRelationship)
++* Set of Dimensions specified by a GroupKey (GroupRelationship – this is retained for compatibility reasons – or +groupKey of the DimensionRelationship)
  * Observation (ObservationRelationship)
--* In addition to the positioning of an //AttributeComponent// within a //[[DataSet>>doc:xwiki:Glossary.Data set.WebHome]]//, another relationship indicates the [[Measure>>doc:xwiki:Glossary.Measure.WebHome]](s) for which the //AttributeComponent// is reported. Regardless of the position of the //AttributeComponent// within the //[[DataSet>>doc:xwiki:Glossary.Data set.WebHome]]//, the //AttributeComponent// may concern one, more than one, or all [[Measures>>doc:xwiki:Glossary.Measure.WebHome]] included in the [[DSD>>doc:xwiki:Glossary.Data structure definition.WebHome]]. This is expressed using the MeasureRelationship class, which relates a DataAttribute to one or more [[Measures>>doc:xwiki:Glossary.Measure.WebHome]]. Lack of the MeasureRelationship defaults to a relationship to all [[Measures>>doc:xwiki:Glossary.Measure.WebHome]].
++* In addition to the positioning of an //AttributeComponent// within a //DataSet//, another relationship indicates the Measure(s) for which the //AttributeComponent// is reported. Regardless of the position of the //AttributeComponent// within the //DataSet//, the //AttributeComponent// may concern one, more than one, or all Measures included in the DSD. This is expressed using the MeasureRelationship class, which relates a DataAttribute to one or more Measures. Lack of the MeasureRelationship defaults to a relationship to all Measures.
  [[image:SDMX 3-0-0 SECTION 2 FINAL-1.0 (1)_en_f235bfd4.jpg||height="542" width="604"]]
@@ -144,10 +144,10 @@
  (% style="width:839.039px" %)
  |**Relationship**|(% style="width:384px" %)**Meaning**|(% style="width:303px" %)**Location in Data Set at which the Attribute is reported**
--|DataflowRelationship|(% style="width:384px" %)The value of the [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is fixed for all data contained in the [[dataset>>doc:xwiki:Glossary.Data set.WebHome]]. The [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] value applies to all data defined by the underlying [[Dataflow>>doc:xwiki:Glossary.Dataflow.WebHome]].|(% style="width:303px" %)The [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is reported at the [[Dataset>>doc:xwiki:Glossary.Data set.WebHome]] (% style="color:#2ecc71" %)level(%%).
--|[[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] (1..n)|(% style="width:384px" %)The value of the [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] will vary with the value(s) of the referenced [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]](s). In this case, Group(s) to which the [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] should be attached may optionally be specified.|(% style="width:303px" %)The [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is reported at the lowest (% style="color:#2ecc71" %)level(%%) of the [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] to which the [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is related, otherwise at the (% style="color:#2ecc71" %)level(%%) of the Group if Attachment Group(s) is specified.
--|Group|(% style="width:384px" %)The value of the [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] varies with combination of values for all of the [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] contained in the Group. This is added as a convenience to listing all [[Dimensions>>doc:xwiki:Glossary.Dimension.WebHome]] and the attachment Group, but should only be used when the [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] value varies based on __all__ Group [[Dimension>>doc:xwiki:Glossary.Dimension.WebHome]] values.|(% style="width:303px" %)The [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is reported at the (% style="color:#2ecc71" %)level(%%) of Group.
--|Observation|(% style="width:384px" %)The value of the [[Attribute>>doc:xwiki:Glossary.Attribute.WebHome]] varies with the observed value.|(% style="width:303px" %)The [[attribute>>doc:xwiki:Glossary.Attribute.WebHome]] is reported at the (% style="color:#2ecc71" %)level(%%) of Observation.
++|DataflowRelationship|(% style="width:384px" %)The value of the attribute is fixed for all data contained in the dataset. The Attribute value applies to all data defined by the underlying Dataflow.|(% style="width:303px" %)The attribute is reported at the Dataset level.
++|Dimension (1..n)|(% style="width:384px" %)The value of the attribute will vary with the value(s) of the referenced Dimension(s). In this case, Group(s) to which the attribute should be attached may optionally be specified.|(% style="width:303px" %)The attribute is reported at the lowest level of the Dimension to which the Attribute is related, otherwise at the level of the Group if Attachment Group(s) is specified.
++|Group|(% style="width:384px" %)The value of the Attribute varies with combination of values for all of the Dimensions contained in the Group. This is added as a convenience to listing all Dimensions and the attachment Group, but should only be used when the Attribute value varies based on __all__ Group Dimension values.|(% style="width:303px" %)The attribute is reported at the level of Group.
++|Observation|(% style="width:384px" %)The value of the Attribute varies with the observed value.|(% style="width:303px" %)The attribute is reported at the level of Observation.
  [[image:SDMX 3-0-0 SECTION 2 FINAL-1.0 (1)_en_42ff01fb.jpg||height="380" width="590"]]
@@ -294,153 +294,194 @@
  ==== 5.4.3.2 Definitions ====
  (% style="width:812.039px" %)
--|(% style="width:147px" %)**Class**|(% style="width:246px" %)**Feature**|(% style="width:395px" %)**Description**
--|(% style="width:147px" %)//DataSet//|(% style="width:246px" %)(((
++|(% style="width:147px" %)**Class**|(% style="width:222px" %)**Feature**|(% style="width:437px" %)**Description**
++|(% style="width:147px" %)//DataSet//|(% style="width:222px" %)(((
  Abstract Class
++
  Sub classes
++
  StructureSpecificData
++
  Set
--)))|(% style="width:395px" %)An organised collection of data.
--|(% style="width:147px" %) |(% style="width:246px" %)reportingBegin|(% style="width:395px" %)A specific time period in a known system of time periods that identifies the start period of a report.
--|(% style="width:147px" %) |(% style="width:246px" %)reportingEnd|(% style="width:395px" %)A specific time period in a known system of time periods that identifies the end period of a report.
--|(% style="width:147px" %) |(% style="width:246px" %)dataExtractionDate|(% style="width:395px" %)A specific time period that identifies the date and time that the data are extracted from a data source.
--|(% style="width:147px" %) |(% style="width:246px" %)validFrom|(% style="width:395px" %)Indicates the inclusive start time indicating the validity of the information in the data set.
--|(% style="width:147px" %) |(% style="width:246px" %)validTo|(% style="width:395px" %)Indicates the inclusive end time indicating the validity of the information in the data set.
--|(% style="width:147px" %) |(% style="width:246px" %)publicationYear|(% style="width:395px" %)Specifies the year of publication of the data or metadata in terms of whatever provisioning agreements might be in force.
--|(% style="width:147px" %) |(% style="width:246px" %)publicationPeriod|(% style="width:395px" %)Specifies the period of publication of the data or metadata in terms of whatever provisioning agreements might be in force.
--|(% style="width:147px" %) |(% style="width:246px" %)setId|(% style="width:395px" %)Provides an identification of the data set.
--|(% style="width:147px" %) |(% style="width:246px" %)action|(% style="width:395px" %)Defines the action to be taken by the recipient system (information, append, replace, delete)
--|(% style="width:147px" %) |(% style="width:246px" %)describedBy|(% style="width:395px" %)Associates a Dataflow and thereby a Data Structure Definition to the data set.
--|(% style="width:147px" %) |(% style="width:246px" %)+structuredBy|(% style="width:395px" %)Associates the Data Structure Definition that defines the structure of the Data Set. Note that the Data Structure Definition is the same as that associated (non-mandatory) to the Dataflow.
--|(% style="width:147px" %) |(% style="width:246px" %)+publishedBy|(% style="width:395px" %)Associates the Data Provider that reports/publishes the data.
--|(% style="width:147px" %)StructureSpecific DataSet|(% style="width:246px" %) |(% style="width:395px" %)An XML specific data format structure that contains data corresponding to one specific Data Structure Definition.
--|(% style="width:147px" %)//Key//|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)An organised collection of data.
++|(% style="width:147px" %) |(% style="width:222px" %)reportingBegin|(% style="width:437px" %)A specific time period in a known system of time periods that identifies the start period of a report.
++|(% style="width:147px" %) |(% style="width:222px" %)reportingEnd|(% style="width:437px" %)A specific time period in a known system of time periods that identifies the end period of a report.
++|(% style="width:147px" %) |(% style="width:222px" %)dataExtractionDate|(% style="width:437px" %)A specific time period that identifies the date and time that the data are extracted from a data source.
++|(% style="width:147px" %) |(% style="width:222px" %)validFrom|(% style="width:437px" %)Indicates the inclusive start time indicating the validity of the information in the data set.
++|(% style="width:147px" %) |(% style="width:222px" %)validTo|(% style="width:437px" %)Indicates the inclusive end time indicating the validity of the information in the data set.
++|(% style="width:147px" %) |(% style="width:222px" %)publicationYear|(% style="width:437px" %)Specifies the year of publication of the data or metadata in terms of whatever provisioning agreements might be in force.
++|(% style="width:147px" %) |(% style="width:222px" %)publicationPeriod|(% style="width:437px" %)Specifies the period of publication of the data or metadata in terms of whatever provisioning agreements might be in force.
++|(% style="width:147px" %) |(% style="width:222px" %)setId|(% style="width:437px" %)Provides an identification of the data set.
++|(% style="width:147px" %) |(% style="width:222px" %)action|(% style="width:437px" %)Defines the action to be taken by the recipient system (information, append, replace, delete)
++|(% style="width:147px" %) |(% style="width:222px" %)describedBy|(% style="width:437px" %)Associates a Dataflow and thereby a Data Structure Definition to the data set.
++|(% style="width:147px" %) |(% style="width:222px" %)+structuredBy|(% style="width:437px" %)Associates the Data Structure Definition that defines the structure of the Data Set. Note that the Data Structure Definition is the same as that associated (non-mandatory) to the Dataflow.
++|(% style="width:147px" %) |(% style="width:222px" %)+publishedBy|(% style="width:437px" %)Associates the Data Provider that reports/publishes the data.
++|(% style="width:147px" %)StructureSpecific DataSet|(% style="width:222px" %) |(% style="width:437px" %)An XML specific data format structure that contains data corresponding to one specific Data Structure Definition.
++|(% style="width:147px" %)//Key//|(% style="width:222px" %)(((
  Abstract class Sub classes
++
  SeriesKey
++
  GroupKey
--)))|(% style="width:395px" %)Comprises the cross product of values of dimensions that identify uniquely an Observation.
--|(% style="width:147px" %) |(% style="width:246px" %)keyValues|(% style="width:395px" %)Association to the individual Key Values that comprise the Key.
--|(% style="width:147px" %) |(% style="width:246px" %)+attachedAttribute|(% style="width:395px" %)Association to the Attribute Values relating to the Series Key or Group Key.
--|(% style="width:147px" %)//KeyValue//|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)Comprises the cross product of values of dimensions that identify uniquely an Observation.
++|(% style="width:147px" %) |(% style="width:222px" %)keyValues|(% style="width:437px" %)Association to the individual Key Values that comprise the Key.
++|(% style="width:147px" %) |(% style="width:222px" %)+attachedAttribute|(% style="width:437px" %)Association to the Attribute Values relating to the Series Key or Group Key.
++|(% style="width:147px" %)//KeyValue//|(% style="width:222px" %)(((
  Abstract class Sub classes
++
  TimeKeyValue
++
  CodedKeyValue
++
  UncodedKeyValue
--)))|(% style="width:395px" %)The value of a component of a key such as the value of the instance a Dimension in a Dimension Descriptor of a Data Structure Definition.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueFor|(% style="width:395px" %)(((
++)))|(% style="width:437px" %)The value of a component of a key such as the value of the instance a Dimension in a Dimension Descriptor of a Data Structure Definition.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueFor|(% style="width:437px" %)(((
  Association to the key component in the Data Structure Definition for which this Key Value is a valid representation.
  Note that this is conceptual association as the key component is identified explicitly in the data set.
  )))
--|(% style="width:147px" %)TimeKeyValue|(% style="width:246px" %)(((
++|(% style="width:147px" %)TimeKeyValue|(% style="width:222px" %)(((
  Inherits from
++
  //KeyValue//
--)))|(% style="width:395px" %)The value of the Time Dimension component of the key.
--|(% style="width:147px" %)CodedKeyValue|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)The value of the Time Dimension component of the key.
++|(% style="width:147px" %)CodedKeyValue|(% style="width:222px" %)(((
  Inherits from
++
  //KeyValue//
--)))|(% style="width:395px" %)The value of a coded component of the key. The value is the Code to which this class is associated.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueOf|(% style="width:395px" %)Association to the Code. Note that this is a conceptual association showing that the Code must exist in the Code list associated with the Dimension in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Key Value.
--|(% style="width:147px" %)UnCodedKeyValue|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)The value of a coded component of the key. The value is the Code to which this class is associated.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueOf|(% style="width:437px" %)Association to the Code. Note that this is a conceptual association showing that the Code must exist in the Code list associated with the Dimension in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Key Value.
++|(% style="width:147px" %)UnCodedKeyValue|(% style="width:222px" %)(((
  Inherits from
++
  //KeyValue//
--)))|(% style="width:395px" %)The value of an uncoded component of the key.
--|(% style="width:147px" %) |(% style="width:246px" %)value|(% style="width:395px" %)The value of the key component.
--|(% style="width:147px" %) |(% style="width:246px" %)startTime|(% style="width:395px" %)This attribute is only used if the textFormat of the attribute is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
--|(% style="width:147px" %)GroupKey|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)The value of an uncoded component of the key.
++|(% style="width:147px" %) |(% style="width:222px" %)value|(% style="width:437px" %)The value of the key component.
++|(% style="width:147px" %) |(% style="width:222px" %)startTime|(% style="width:437px" %)This attribute is only used if the textFormat of the attribute is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
++|(% style="width:147px" %)GroupKey|(% style="width:222px" %)(((
  Inherits from
++
  //Key//
--)))|(% style="width:395px" %)A set of Key Values that comprise a partial key, of the same dimensionality as the Time Series Key for the purpose of attaching Data Attributes.
--|(% style="width:147px" %) |(% style="width:246px" %)+describedBy|(% style="width:395px" %)Associates the Group Dimension Descriptor defined in the Data Structure Definition.
--|(% style="width:147px" %)SeriesKey|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)A set of Key Values that comprise a partial key, of the same dimensionality as the Time Series Key for the purpose of attaching Data Attributes.
++|(% style="width:147px" %) |(% style="width:222px" %)+describedBy|(% style="width:437px" %)Associates the Group Dimension Descriptor defined in the Data Structure Definition.
++|(% style="width:147px" %)SeriesKey|(% style="width:222px" %)(((
  Inherits from
++
  //Key//
--)))|(% style="width:395px" %)Comprises the cross product of values of all the Key Values that, together with the Key Value of the +observation Dimension identify uniquely an Observation.
--|(% style="width:147px" %) |(% style="width:246px" %)+describedBy|(% style="width:395px" %)Associates the Dimension Descriptor defined in the Data Structure Definition.
--|(% style="width:147px" %)Observation|(% style="width:246px" %) |(% style="width:395px" %)The value(s) of the observed phenomenon in the context of the Key Values comprising the key.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueFor|(% style="width:395px" %)(((
++)))|(% style="width:437px" %)Comprises the cross product of values of all the Key Values that, together with the Key Value of the +observation Dimension identify uniquely an Observation.
++|(% style="width:147px" %) |(% style="width:222px" %)+describedBy|(% style="width:437px" %)Associates the Dimension Descriptor defined in the Data Structure Definition.
++|(% style="width:147px" %)Observation|(% style="width:222px" %) |(% style="width:437px" %)The value(s) of the observed phenomenon in the context of the Key Values comprising the key.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueFor|(% style="width:437px" %)(((
  Associates the Measure(s) defined in the Data Structure Definition.
  The source multiplicity (1..*) indicates that more than one values may be provided for a Measure, if the latter allows it.
  )))
--|(% style="width:147px" %) |(% style="width:246px" %)+attachedAttribute|(% style="width:395px" %)Association to the Attribute Values relating to the Observation.
--|(% style="width:147px" %) |(% style="width:246px" %)+observationDimension|(% style="width:395px" %)Association to the Key Value that holds the value of the “Dimension at the Observation Level”.
--|(% style="width:147px" %)//ObservationValue//|(% style="width:246px" %)(((
++|(% style="width:147px" %) |(% style="width:222px" %)+attachedAttribute|(% style="width:437px" %)Association to the Attribute Values relating to the Observation.
++|(% style="width:147px" %) |(% style="width:222px" %)+observationDimension|(% style="width:437px" %)Association to the Key Value that holds the value of the “Dimension at the Observation Level”.
++|(% style="width:147px" %)//ObservationValue//|(% style="width:222px" %)(((
  Abstract class
++
  Sub classes
--//UncodedObservationValue//
++
++//UncodedObservationVal//
++
++//ue//
++
  CodedObservation
--)))|(% style="width:395px" %)
--|(% style="width:147px" %)//UncodedObservatio nValue//|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)
++|(% style="width:147px" %)//UncodedObservatio nValue//|(% style="width:222px" %)(((
  Abstract class
++
  Inherits from
++
  //ObservationValue//
++
  Sub classes
--OtherUncodedMeasureValue
++
++OtherUncodedMeasureVa lue
++
  TextMeasureValue
--)))|(% style="width:395px" %)
--|(% style="width:147px" %)OtherUncodedMeasu reValue|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)
++|(% style="width:147px" %)OtherUncodedMeasu reValue|(% style="width:222px" %)(((
  Inherits from
--//UncodedObservationValue//
--)))|(% style="width:395px" %)An observation that has a text value.
--|(% style="width:147px" %) |(% style="width:246px" %)value|(% style="width:395px" %)The value of the Uncoded Observation.
--|(% style="width:147px" %) |(% style="width:246px" %)startTime|(% style="width:395px" %)This attribute is only used if the textFormat of the Measure is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
--|(% style="width:147px" %)TextMeasureValue|(% style="width:246px" %)(((
++//UncodedObservationVal ue//
++)))|(% style="width:437px" %)An observation that has a text value.
++|(% style="width:147px" %) |(% style="width:222px" %)value|(% style="width:437px" %)The value of the Uncoded Observation.
++|(% style="width:147px" %) |(% style="width:222px" %)startTime|(% style="width:437px" %)This attribute is only used if the textFormat of the Measure is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
++|(% style="width:147px" %)TextMeasureValue|(% style="width:222px" %)(((
  Inherits from
--//UncodedObservationValue//
--)))|(% style="width:395px" %)An observation that has a localised text value
--|(% style="width:147px" %) |(% style="width:246px" %)text|(% style="width:395px" %)The localised text values.
--|(% style="width:147px" %)CodedObservation|(% style="width:246px" %)(((
++
++//UncodedObservationVal ue//
++)))|(% style="width:437px" %)An observation that has a localised text value
++|(% style="width:147px" %) |(% style="width:222px" %)text|(% style="width:437px" %)The localised text values.
++|(% style="width:147px" %)CodedObservation|(% style="width:222px" %)(((
  Inherits from
++
  //ObservationValue//
--)))|(% style="width:395px" %)An Observation that takes its value from a code in a Code list.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueOf|(% style="width:395px" %)Association to the Code that is the value of the Observation. Note that this is a conceptual association showing that the Code must exist in the Codelist(s) associated with the Measure(s) in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Observation.
--|(% style="width:147px" %)//AttributeValue//|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)An Observation that takes its value from a code in a Code list.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueOf|(% style="width:437px" %)Association to the Code that is the value of the Observation. Note that this is a conceptual association showing that the Code must exist in the Codelist(s) associated with the Measure(s) in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Observation.
++|(% style="width:147px" %)//AttributeValue//|(% style="width:222px" %)(((
  Abstract class
++
  Sub classes
--//DataAttributeValue// //MetadataAttributeValue//
--)))|(% style="width:395px" %)Represents the value for any Attribute reported in the Dataset, i.e., Data or Metadata Attribute.
--|(% style="width:147px" %)//DataAttributeValue//|(% style="width:246px" %)(((
++
++//DataAttributeValue// //MetadataAttributeValu e//
++)))|(% style="width:437px" %)Represents the value for any Attribute reported in the Dataset, i.e., Data or Metadata Attribute.
++|(% style="width:147px" %)//DataAttributeValu e//|(% style="width:222px" %)(((
  Abstract class
++
  Inherits from
++
  //AttributeValue//
++
  Sub classes
--//UncodedAttributeValue
--CodedAttributeValue//
--)))|(% style="width:395px" %)The value of a Data Attribute, such as the instance of a Coded Attribute or of an Uncoded Attribute in a structure such as a Data Structure Definition.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueFor|(% style="width:395px" %)(((
++
++//UncodedAttributeValue//
++
++//CodedAttributeValue//
++)))|(% style="width:437px" %)The value of a Data Attribute, such as the instance of a Coded Attribute or of an Uncoded Attribute in a structure such as a Data Structure Definition.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueFor|(% style="width:437px" %)(((
  Association to the Data Attribute defined in the Data Structure Definition. Note that this is conceptual association as the Concept is identified explicitly in the data set.
  The source multiplicity (1..*) indicates the possibility to provide more than one values for a Data Attribute, if the latter allows it.
  )))
--|(% style="width:147px" %)//MetadataAttribute Value//|(% style="width:246px" %)(((
--(explained further in section “Metadata Set”)
--)))|(% style="width:395px" %)(((
++|(% style="width:147px" %)//MetadataAttribute Value//|(% style="width:222px" %)(((
++(explained further in section
++
++“Metadata Set”)
++)))|(% style="width:437px" %)(((
  The value of a Metadata Attribute, as specified in the Metadata Structure Definition, which is linked in the Data Structure
  Definition
  )))
--|(% style="width:147px" %)//UncodedAttributeV alue//|(% style="width:246px" %)(((
++|(% style="width:147px" %)//UncodedAttributeV alue//|(% style="width:222px" %)(((
  Inherits from
++
  //AttributeValue//
++
  Sub classes
++
  OtherUncodedAttribute Value
++
  TextAttributeValue
--)))|(% style="width:395px" %)
--|(% style="width:147px" %)OtherUncodedAttri buteValue|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)
++|(% style="width:147px" %)OtherUncodedAttri buteValue|(% style="width:222px" %)(((
  Inherits from
--//UncodedObservationValue//
--)))|(% style="width:395px" %)An attribute value that has a text value
--|(% style="width:147px" %) |(% style="width:246px" %)value|(% style="width:395px" %)The value of the Uncoded attribute.
--|(% style="width:147px" %) |(% style="width:246px" %)startTime|(% style="width:395px" %)This attribute is only used if the textFormat of the attribute is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
--|(% style="width:147px" %)TextAttributeValu e|(% style="width:246px" %)(((
++
++//UncodedObservationVal ue//
++)))|(% style="width:437px" %)An attribute value that has a text value
++|(% style="width:147px" %) |(% style="width:222px" %)value|(% style="width:437px" %)The value of the Uncoded attribute.
++|(% style="width:147px" %) |(% style="width:222px" %)startTime|(% style="width:437px" %)This attribute is only used if the textFormat of the attribute is of the Timespan type in the Data Structure Definition (in which case the value field takes a duration).
++|(% style="width:147px" %)TextAttributeValu e|(% style="width:222px" %)(((
  Inherits from
++
  //UncodedAttributeValue//
--)))|(% style="width:395px" %)An attribute that has a localised text value
--|(% style="width:147px" %) |(% style="width:246px" %)text|(% style="width:395px" %)The localised text values.
--|(% style="width:147px" %)CodedAttributeVal ue|(% style="width:246px" %)(((
++)))|(% style="width:437px" %)An attribute that has a localised text value
++|(% style="width:147px" %) |(% style="width:222px" %)text|(% style="width:437px" %)The localised text values.
++|(% style="width:147px" %)CodedAttributeVal ue|(% style="width:222px" %)(((
  Inherits from
++
  //AttributeValue//
--)))|(% style="width:395px" %)An attribute that takes it value from a Code in Code list.
--|(% style="width:147px" %) |(% style="width:246px" %)+valueOf|(% style="width:395px" %)Association to the Code that is the value of the Attribute Value. Note that this is a conceptual association showing that the Code must exist in the Code list associated with the Data Attribute in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Attribute Value.
++)))|(% style="width:437px" %)An attribute that takes it value from a Code in Code list.
++|(% style="width:147px" %) |(% style="width:222px" %)+valueOf|(% style="width:437px" %)Association to the Code that is the value of the Attribute Value. Note that this is a conceptual association showing that the Code must exist in the Code list associated with the Data Attribute in the Data Structure Definition. In the actual Data Set the value of the Code is placed in the Attribute Value.