Changes for page 5 Data Structure Definition and Dataset

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108	108	Note that [[DimensionComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.WebHome]] can be any or all its sub classes i.e., [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]], [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]].
109	109
110		-The //DimensionComponent//, DataAttribute, MetadataAttribute and [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] link to the (% style="color:#e74c3c" %)Concept(%%) that defines its name and semantic (/conceptIdentity association to (% style="color:#e74c3c" %)Concept(%%)). The DataAttribute, [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] (but not TimeDimension) and [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] can optionally have a +conceptRole association with a (% style="color:#e74c3c" %)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:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] (% style="color:#e74c3c" %)CONCEPT(%%) ROLES" by the [[SDMX>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.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.
	110	+The //[[DimensionComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.WebHome]]//, [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]], [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] and [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] link to the [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] that defines its [[name>>doc:IMElements.name.WebHome]] and semantic (/conceptIdentity association to [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]]). The [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]], [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] (but not [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]]) and [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] can optionally have a +conceptRole association with a [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] that identifies its [[role>>doc:IMElements.role.WebHome]] in the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]], or one of the standard pre-defined roles, i.e., those published in "GUIDELINES FOR SDMX CONCEPT ROLES" by the [[SDMX>>doc:sdmx:Glossary 2\.1.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 [[value>>doc:IMElements.value.WebHome]] 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.
111	111
112		-The valid values for a //DimensionComponent//, [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]], DataAttribute or MetadataAttribute, when used in this DataStructureDefinition, are defined by the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]]. This [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is taken from the (% style="color:#e74c3c" %)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:sdmx:Glossary 2\.1.Representation.WebHome]] of MetadataAttributes are specified in the corresponding MetadataStructureDefinition, linked by the DataStructureDefinition.
	112	+The valid values for a //[[DimensionComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.WebHome]]//, [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]], [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] or [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]], when used in this [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]], are defined by the [[Representation>>doc:IMElements.Representation.WebHome]]. This [[Representation>>doc:IMElements.Representation.WebHome]] is taken from the [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] definition ([[coreRepresentation>>doc:IMElements.coreRepresentation.WebHome]]) unless it is overridden in this [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] ([[localRepresentation>>doc:IMElements.localRepresentation.WebHome]]) – see Figure 28. Note also that [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]] is constrained to specific FacetValueTypes. Moreover, the Representations of MetadataAttributes are specified in the corresponding [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]], linked by the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]].
113	113
114		-There will always be a DimensionDescriptor grouping that identifies all of the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] comprising the full key. Together the [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] specify the key of an Observation.
	114	+There will always be a [[DimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.DimensionDescriptor.WebHome]] [[grouping>>doc:IMElements.grouping.WebHome]] that identifies all of the [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] comprising the full key. Together the Dimensions specify the key of an [[Observation>>doc:IMElements.AnnotableArtefact.Observation.WebHome]].
115	115
116		-The //DimensionComponent// can optionally be grouped by multiple GroupDimensionDescriptors each of which identifies the group of [[Dimensions>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Data set.WebHome]] to declare which DataAttributes or MetadataAttributes are reported at this group (% style="color:#e74c3c" %)level(%%) in the [[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]].
	116	+The //[[DimensionComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.WebHome]]// can optionally be grouped by multiple GroupDimensionDescriptors each of which identifies the group of Dimensions that can form a partial key. The [[GroupDimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.GroupDimensionDescriptor.WebHome]] must be identified ([[GroupDimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.GroupDimensionDescriptor.WebHome]].id) and this is used in the [[GroupKey>>doc:IMElements.AnnotableArtefact.Key.GroupKey.WebHome]] of the [[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] to declare which DataAttributes or MetadataAttributes are reported at this group level in the [[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]].
117	117
118		-There can be a maximum of one TimeDimension specified in the DimensionDescriptor. The TimeDimension is used to specify the (% style="color:#e74c3c" %)Concept(%%) used to convey the [[time period>>doc:sdmx:Glossary 2\.1.Time period.WebHome]] of the observation in a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]. The TimeDimension must contain a valid [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] of time and cannot be coded.
	118	+There can be a maximum of one [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]] specified in the [[DimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.DimensionDescriptor.WebHome]]. The [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]] is used to specify the [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] used to convey the [[time period>>doc:sdmx:Glossary 2\.1.Time period.WebHome]] of the observation in a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]. The [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]] must contain a valid representation of time and cannot be coded.
119	119
120		-There can be one or more [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] under the MeasureDescriptor. [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] represent the observable phenomena. Each [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] may have a valid [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]], a maxOccurs [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] limiting the maximum number of values per [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] (which may be set to 'unbounded' for unlimited occurrences), as well as a minOccurs [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]], indicating the minimum required number of values, when the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] is reported. If minOccurs or maxOccurs are omitted (they both default to ‘1’), the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] is considered to take a single value; otherwise, it is an array. Moreover, the usage [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] indicates whether a [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] must be reported or not, by the corresponding values: mandatory or optional.
	120	+There can be one or more Measures under the [[MeasureDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MeasureDescriptor.WebHome]]. Measures represent the observable phenomena. Each [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] may have a valid representation, a [[maxOccurs>>doc:IMElements.maxOccurs.WebHome]] [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] limiting the maximum number of values per [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] (which may be set to 'unbounded' for unlimited occurrences), as well as a [[minOccurs>>doc:IMElements.minOccurs.WebHome]] [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]], indicating the minimum required number of values, when the [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] is reported. If [[minOccurs>>doc:IMElements.minOccurs.WebHome]] or [[maxOccurs>>doc:IMElements.maxOccurs.WebHome]] are omitted (they both default to ‘1’), the [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] is considered to take a single [[value>>doc:IMElements.value.WebHome]]; otherwise, it is an array. Moreover, the usage [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] indicates whether a [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]] must be reported or not, by the corresponding values: mandatory or optional.
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122		-The AttributeDescriptor may contain one or more //[[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]//s, i.e., at least one DataAttribute definition or one MetadataAttribute reference.
	122	+The [[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]] may contain one or more //[[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]//s, i.e., at least one [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] definition or one [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] reference.
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124		-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:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.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:#e74c3c" %)Concept(%%) that identifies its role.
	124	+The [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] defines a characteristic of data that are collected or disseminated and is grouped in the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] by a single [[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]]. The [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] can be indicated if it must be reported or not, by the corresponding [[value>>doc:IMElements.value.WebHome]] of the usage [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]: i.e., mandatory or optional. The property [[minOccurs>>doc:IMElements.minOccurs.WebHome]] specifies the minimum number of array values to be included when the [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] is reported. Moreover, a [[maxOccurs>>doc:IMElements.maxOccurs.WebHome]] [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] indicates whether the [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] may need to report more than one values, i.e., an array of values. The [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] may play a specific [[role>>doc:IMElements.role.WebHome]] in the [[structure>>doc:IMElements.structure.WebHome]] and this is specified by the +[[role>>doc:IMElements.role.WebHome]] association to the [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] that identifies its [[role>>doc:IMElements.role.WebHome]].
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126		-The MetadataAttribute defines [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] that may be collected or disseminated and is grouped together with DataAttribute under the AttributeDescriptor.
	126	+The [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] defines [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]] that may be collected or disseminated and is grouped together with [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] under the [[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]].
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128		-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:sdmx:Glossary 2\.1.Data set.WebHome]]//. An //AttributeComponent// can be specified as being related to one of the following [[artefacts>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]]:
	128	+A [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] or a [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] (i.e., an //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]//) is specified as being +[[relatedTo>>doc:IMElements.relatedTo.WebHome]] an [[AttributeRelationship>>doc:IMElements.AttributeRelationship.WebHome]], which defines the constructs to which the //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// is to be reported within a //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//. An //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// can be specified as being related to one of the following [[artefacts>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]]:
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130		-* All data within the [[dataset>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] (DataflowRelationship) – this is equivalent to attaching an [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] to all data within the [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]].
131		-* [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] or set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] (DimensionRelationship)
132		-* Set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] specified by a GroupKey (GroupRelationship – this is retained for compatibility reasons – or +groupKey of the DimensionRelationship)
133		-* Observation (ObservationRelationship)
134		-* In addition to the positioning of an //AttributeComponent// within a //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//, another relationship indicates the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]](s) for which the //AttributeComponent// is reported. Regardless of the position of the //AttributeComponent// within the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//, the //AttributeComponent// may concern one, more than one, or all [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] included in the [[DSD>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]. This is expressed using the MeasureRelationship class, which relates a DataAttribute to one or more [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]]. Lack of the MeasureRelationship defaults to a relationship to all [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]].
	130	+* All data within the [[dataset>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] (DataflowRelationship) – this is equivalent to attaching an [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] to all data within the [[Dataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Dataflow.WebHome]].
	131	+* [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] or set of Dimensions ([[DimensionRelationship>>doc:IMElements.AttributeRelationship.DimensionRelationship.WebHome]])
	132	+* Set of Dimensions specified by a [[GroupKey>>doc:IMElements.AnnotableArtefact.Key.GroupKey.WebHome]] ([[GroupRelationship>>doc:IMElements.AttributeRelationship.GroupRelationship.WebHome]] – this is retained for compatibility reasons – or +[[groupKey>>doc:IMElements.groupKey.WebHome]] of the [[DimensionRelationship>>doc:IMElements.AttributeRelationship.DimensionRelationship.WebHome]])
	133	+* [[Observation>>doc:IMElements.AnnotableArtefact.Observation.WebHome]] ([[ObservationRelationship>>doc:IMElements.AttributeRelationship.ObservationRelationship.WebHome]])
	134	+* In addition to the positioning of an //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// within a //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//, another relationship indicates the [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]](s) for which the //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// is reported. Regardless of the position of the //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// within the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//, the //[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]// may concern one, more than one, or all Measures included in the [[DSD>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]. This is expressed using the [[MeasureRelationship>>doc:IMElements.AttributeRelationship.MeasureRelationship.WebHome]] class, which relates a [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] to one or more Measures. Lack of the [[MeasureRelationship>>doc:IMElements.AttributeRelationship.MeasureRelationship.WebHome]] defaults to a relationship to all Measures.
135	135
136	136	[[image:image55.png]]
137	137
138	138	**Figure 29: Attribute Attachment Defined in the Data Structure Definition**
139	139
140		-The following table details the possible relationships a DataAttribute may specify. Note that these relationships are mutually exclusive, and therefore only one of the following is possible.
	140	+The following table details the possible relationships a [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] may specify. Note that these relationships are mutually exclusive, and therefore only one of the following is possible.
141	141
142	142	(% style="width:1142.83px" %)
143	143	|**Relationship**|(% style="width:537px" %)**Meaning**|(% style="width:434px" %)**Location in Data Set at which the Attribute is reported**
144		-|DataflowRelationship|(% style="width:537px" %)The value of the [[attribute>>doc:Glossary.Attribute.WebHome]] is fixed for all data contained in the [[dataset>>doc:Glossary.Data set.WebHome]]. The [[Attribute>>doc:Glossary.Attribute.WebHome]] value applies to all data defined by the underlying [[Dataflow>>doc:Glossary.Dataflow.WebHome]].|(% style="width:434px" %)The [[attribute>>doc:Glossary.Attribute.WebHome]] is reported at the [[Dataset>>doc:Glossary.Data set.WebHome]] level.
145		-|[[Dimension>>doc:Glossary.Dimension.WebHome]] (1..n)|(% style="width:537px" %)The value of the [[attribute>>doc:Glossary.Attribute.WebHome]] will vary with the value(s) of the referenced [[Dimension>>doc:Glossary.Dimension.WebHome]](s). In this case, Group(s) to which the [[attribute>>doc:Glossary.Attribute.WebHome]] should be attached may optionally be specified.|(% style="width:434px" %)The [[attribute>>doc:Glossary.Attribute.WebHome]] is reported at the lowest level of the [[Dimension>>doc:Glossary.Dimension.WebHome]] to which the [[Attribute>>doc:Glossary.Attribute.WebHome]] is related, otherwise at the level of the Group if Attachment Group(s) is specified.
146		-|Group|(% style="width:537px" %)The value of the [[Attribute>>doc:Glossary.Attribute.WebHome]] varies with combination of values for all of the [[Dimensions>>doc:Glossary.Dimension.WebHome]] contained in the Group. This is added as a convenience to listing all [[Dimensions>>doc:Glossary.Dimension.WebHome]] and the attachment Group, but should only be used when the [[Attribute>>doc:Glossary.Attribute.WebHome]] value varies based on all Group [[Dimension>>doc:Glossary.Dimension.WebHome]] values.|(% style="width:434px" %)The [[attribute>>doc:Glossary.Attribute.WebHome]] is reported at the level of Group.
147		-|Observation|(% style="width:537px" %)The value of the [[Attribute>>doc:Glossary.Attribute.WebHome]] varies with the observed value.|(% style="width:434px" %)The [[attribute>>doc:Glossary.Attribute.WebHome]] is reported at the level of Observation.
	144	+|DataflowRelationship|(% style="width:537px" %)The [[value>>doc:IMElements.value.WebHome]] of the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is fixed for all data contained in the [[dataset>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]. The [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] [[value>>doc:IMElements.value.WebHome]] applies to all data defined by the underlying [[Dataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Dataflow.WebHome]].|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the [[Dataset>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] level.
	145	+|[[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] (1..n)|(% style="width:537px" %)The [[value>>doc:IMElements.value.WebHome]] of the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] will vary with the [[value>>doc:IMElements.value.WebHome]](s) of the referenced [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]](s). In this case, Group(s) to which the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] should be attached may optionally be specified.|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the lowest level of the [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] to which the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related, otherwise at the level of the Group if Attachment Group(s) is specified.
	146	+|Group|(% style="width:537px" %)The [[value>>doc:IMElements.value.WebHome]] of the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] 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>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] [[value>>doc:IMElements.value.WebHome]] varies based on all Group [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] values.|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the level of Group.
	147	+|[[Observation>>doc:IMElements.AnnotableArtefact.Observation.WebHome]]|(% style="width:537px" %)The [[value>>doc:IMElements.value.WebHome]] of the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] varies with the observed [[value>>doc:IMElements.value.WebHome]].|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the level of [[Observation>>doc:IMElements.AnnotableArtefact.Observation.WebHome]].
148	148
149	149	[[image:image56.png]]
150	150
151	151	**Figure 30: Representation of DSD Components**
152	152
153		-Each of [[Dimension>>doc:Glossary.Dimension.WebHome]], TimeDimension, [[Measure>>doc:Glossary.Measure.WebHome]], DataAttribute and MetadataAttribute can have a [[Representation>>doc:Glossary.Representation.WebHome]] specified (using the localRepresentation association). If this is not specified in the DataStructureDefinition then the [[representation>>doc:Glossary.Representation.WebHome]] specified for (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) (coreRepresentation) is used. [[Measure>>doc:Glossary.Measure.WebHome]], and DataAttribute may be also represented by multilingual text (as seen in the [[DataSet>>doc:Glossary.Data set.WebHome]] diagram further down). An exception is the MetadataAttribute, where its [[Representation>>doc:Glossary.Representation.WebHome]] is specified in the MetadataStructureDefinition.
	153	+Each of [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]], [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]], [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]], [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] and [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] can have a [[Representation>>doc:IMElements.Representation.WebHome]] specified (using the [[localRepresentation>>doc:IMElements.localRepresentation.WebHome]] association). If this is not specified in the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] then the representation specified for (% style="color:#e74c3c" %)[[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]](%%) ([[coreRepresentation>>doc:IMElements.coreRepresentation.WebHome]]) is used. [[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]], and [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] may be also represented by multilingual [[text>>doc:IMElements.text.WebHome]] (as seen in the [[DataSet>>doc:Glossary.Data set.WebHome]] diagram further down). An exception is the [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]], where its [[Representation>>doc:IMElements.Representation.WebHome]] is specified in the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]].
154	154
155		-A DataStructureDefinition can be extended to form a derived DataStructureDefinition. This is supported in the StructureMap.
	155	+A [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] can be extended to form a derived [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]]. This is supported in the StructureMap.
156	156
157	157	==== 5.3.2.2 Definitions ====
158	158
159	159	(% style="width:981.835px" %)
160	160	|(% style="width:204px" %)**Class**|(% style="width:236px" %)**Feature**|(% style="width:538px" %)**Description**
161		-|(% style="width:204px" %)StructureUsage|(% style="width:236px" %) |(% style="width:538px" %)See “[[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base”.
162		-|(% style="width:204px" %)[[Dataflow>>doc:Glossary.Dataflow.WebHome]]|(% style="width:236px" %)(((
	161	+|(% style="width:204px" %)StructureUsage|(% style="width:236px" %) |(% style="width:538px" %)See “[[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base”.
	162	+|(% style="width:204px" %)[[Dataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Dataflow.WebHome]]|(% style="width:236px" %)(((
163	163	Inherits from
164	164
165	165	//StructureUsage//
166		-)))|(% style="width:538px" %)Abstract concept (i.e., the structure without any data) of a flow of data that providers will provide for different reference periods.
167		-|(% style="width:204px" %) |(% style="width:236px" %)/structure|(% style="width:538px" %)Associates a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] to the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
168		-|(% style="width:204px" %) |(% style="width:236px" %)dimensionConstraint|(% style="width:538px" %)A list of [[Dimensions>>doc:Glossary.Dimension.WebHome]] which the [[Dataflow>>doc:Glossary.Dataflow.WebHome]] uses. This is only required when the referenced DataStructureDefinition has the evolvingStructure property set to true and when the association to the DataStructureDefinition in on the latest minor (% style="color:#e74c3c" %)[[version>>doc:Glossary.Version.WebHome]]{{footnote}}Referencing the latest minor version of the Data Structure is achieved by the reference including the plus operator on the minor version to indicate it links to the latest stable version, for example 2.0+.0 will resolve to the highest version 2.x.y.{{/footnote}}(%%).
	166	+)))|(% style="width:538px" %)Abstract concept (i.e., the structure without any data) of a flow of data that providers will provide for different [[reference periods>>doc:sdmx:Glossary 2\.1.Reference period.WebHome]].
	167	+|(% style="width:204px" %) |(% style="width:236px" %)/structure|(% style="width:538px" %)Associates a Dataflow to the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	168	+|(% style="width:204px" %) |(% style="width:236px" %)dimensionConstraint|(% style="width:538px" %)A list of Dimensions which the Dataflow uses. This is only required when the referenced DataStructureDefinition has the evolvingStructure property set to true and when the association to the DataStructureDefinition in on the latest minor version{{footnote}}Referencing the latest minor version of the Data Structure is achieved by the reference including the plus operator on the minor version to indicate it links to the latest stable version, for example 2.0+.0 will resolve to the highest version 2.x.y.{{/footnote}}.
169	169	|(% style="width:204px" %)DataStructureDefinition|(% style="width:236px" %) |(% style="width:538px" %)A collection of metadata concepts, their structure and usage when used to collect or disseminate data.
170		-|(% style="width:204px" %) |(% style="width:236px" %)/grouping|(% style="width:538px" %)An association to a set of metadata concepts that have an identified structural role in a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
171		-|(% style="width:204px" %) |(% style="width:236px" %)evolvingStructure|(% style="width:538px" %)An optional boolean property, defaulting to false. When true the DataStructureDefinition may have new [[Dimensions>>doc:Glossary.Dimension.WebHome]] added without having to change its major [[version>>doc:Glossary.Version.WebHome]] number.
	170	+|(% style="width:204px" %) |(% style="width:236px" %)/grouping|(% style="width:538px" %)An association to a set of metadata concepts that have an identified structural role in a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	171	+|(% style="width:204px" %) |(% style="width:236px" %)evolvingStructure|(% style="width:538px" %)An optional boolean property, defaulting to false. When true the DataStructureDefinition may have new Dimensions added without having to change its major version number.
172	172	|(% style="width:204px" %)GroupDimensionDescriptor|(% style="width:236px" %)(((
173	173	Inherits from
174	174	//ComponentList//
175		-)))|(% style="width:538px" %)A set of metadata concepts that define a partial key derived from the [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor in a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
176		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to the [[Dimension>>doc:Glossary.Dimension.WebHome]] [[components>>doc:Glossary.Component.WebHome]] that comprise the group.
	175	+)))|(% style="width:538px" %)A set of metadata concepts that define a partial key derived from the Dimension Descriptor in a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	176	+|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to the Dimension components that comprise the group.
177	177	|(% style="width:204px" %)DimensionDescriptor|(% style="width:236px" %)(((
178	178	Inherits from
179	179	//ComponentList//
180		-)))|(% style="width:538px" %)An ordered set of metadata concepts that, combined, classify a statistical series, and whose values, when combined (the key) in an instance such as a [[data set>>doc:Glossary.Data set.WebHome]], uniquely identify a specific observation.
181		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to the [[Dimension>>doc:Glossary.Dimension.WebHome]] and Time [[Dimension>>doc:Glossary.Dimension.WebHome]] comprising the Key Descriptor.
	180	+)))|(% style="width:538px" %)An ordered set of metadata concepts that, combined, classify a statistical [[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]], and whose values, when combined (the key) in an instance such as a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]], uniquely identify a specific observation.
	181	+|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to the Dimension and Time Dimension comprising the Key Descriptor.
182	182	|(% style="width:204px" %)AttributeDescriptor|(% style="width:236px" %)(((
183	183	Inherits from
184	184	//ComponentList//
185		-)))|(% style="width:538px" %)A set metadata concepts that define the [[Attributes>>doc:Glossary.Attribute.WebHome]] of a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
186		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Data [[Attribute>>doc:Glossary.Attribute.WebHome]] [[component>>doc:Glossary.Component.WebHome]].
187		-|(% style="width:204px" %)MeasureDescriptor|(% style="width:236px" %)(((
	185	+)))|(% style="width:538px" %)A set metadata concepts that define the [[Attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] of a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	186	+|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] component.
	187	+|(% style="width:204px" %)[[MeasureDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MeasureDescriptor.WebHome]]|(% style="width:236px" %)(((
188	188	Inherits from
189		-//ComponentList//
190		-)))|(% style="width:538px" %)A metadata concept that defines the [[Measures>>doc:Glossary.Measure.WebHome]] of a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
191		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a [[Measure>>doc:Glossary.Measure.WebHome]] [[component>>doc:Glossary.Component.WebHome]].
	189	+//[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]//
	190	+)))|(% style="width:538px" %)A metadata concept that defines the Measures of a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	191	+|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Measure component.
192	192	|(% style="width:204px" %)//DimensionComponent//|(% style="width:236px" %)(((
193	193	Inherits from
194		-//[[Component>>doc:Glossary.Component.WebHome]]//
	194	+//[[Component>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.WebHome]]//
195	195	Sub class
196		-[[Dimension>>doc:Glossary.Dimension.WebHome]]
	196	+[[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]]
197	197	TimeDimension
198		-)))|(% style="width:538px" %)An abstract class representing any [[Component>>doc:Glossary.Component.WebHome]] that can be used for identifying observations.
199		-|(% style="width:211px" %) |(% style="width:235px" %)Order|(% style="width:534px" %)Specifies the order of the [[Dimension>>doc:Glossary.Dimension.WebHome]] [[Components>>doc:Glossary.Component.WebHome]] within the [[DSD>>doc:Glossary.Data structure definition.WebHome]]. The property is used to indicate the position of the [[Dimension>>doc:Glossary.Dimension.WebHome]] [[Component>>doc:Glossary.Component.WebHome]] and determines the Key for identifying observations, or series. The Time [[Dimension>>doc:Glossary.Dimension.WebHome]], when specified, must be the last within the [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor.
200		-|(% style="width:211px" %)[[Dimension>>doc:Glossary.Dimension.WebHome]]|(% style="width:235px" %)(((
	198	+)))|(% style="width:538px" %)An abstract class representing any Component that can be used for identifying observations.
	199	+|(% style="width:211px" %) |(% style="width:235px" %)[[Order>>doc:IMElements.Order.WebHome]]|(% style="width:534px" %)Specifies the order of the Dimension Components within the [[DSD>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]. The property is used to indicate the position of the Dimension Component and determines the Key for identifying observations, or [[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]]. The Time Dimension, when specified, must be the last within the Dimension Descriptor.
	200	+|(% style="width:211px" %)[[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]]|(% style="width:235px" %)(((
201	201	Inherits from
202	202	//DimensionComponent//
203		-)))|(% style="width:534px" %)A metadata concept used (most probably together with other metadata concepts) to classify a statistical series, e.g., a statistical concept indicating a certain [[economic activity>>doc:Glossary.Economic activity.WebHome]] or a geographical reference area.
204		-|(% style="width:211px" %) |(% style="width:235px" %)/role|(% style="width:534px" %)Association to the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) that specifies the role that that the [[Dimension>>doc:Glossary.Dimension.WebHome]] plays in the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
205		-|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the metadata concept which defines the semantic of the [[Dimension>>doc:Glossary.Dimension.WebHome]].
	203	+)))|(% style="width:534px" %)A metadata concept used (most probably together with other metadata concepts) to classify a statistical [[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]], e.g., a statistical concept indicating a certain [[economic activity>>doc:sdmx:Glossary 2\.1.Economic activity.WebHome]] or a geographical [[reference area>>doc:sdmx:Glossary 2\.1.Reference area.WebHome]].
	204	+|(% style="width:211px" %) |(% style="width:235px" %)/role|(% style="width:534px" %)Association to the Concept that specifies the role that that the Dimension plays in the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	205	+|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the metadata concept which defines the semantic of the Dimension.
206	206	|(% style="width:211px" %)TimeDimension|(% style="width:235px" %)(((
207	207	Inherits from
208	208	//DimensionComponent//
209		-)))|(% style="width:534px" %)A metadata concept that identifies the [[component>>doc:Glossary.Component.WebHome]] in the key structure that has the role of “time”.
	209	+)))|(% style="width:534px" %)A metadata concept that identifies the component in the key structure that has the role of “time”.
210	210	|(% style="width:211px" %)DataAttribute|(% style="width:235px" %)(((
211	211	Inherits from
212		-//[[Component>>doc:Glossary.Component.WebHome]]//
	212	+//[[Component>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.WebHome]]//
213	213	)))|(% style="width:534px" %)A characteristic of an object or entity.
214		-|(% style="width:211px" %) |(% style="width:235px" %)/role|(% style="width:534px" %)Association to the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) that specifies the role that that the Data [[Attribute>>doc:Glossary.Attribute.WebHome]] plays in the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
215		-|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the [[Attribute>>doc:Glossary.Attribute.WebHome]]. When equals to zero, the [[Attribute>>doc:Glossary.Attribute.WebHome]] is conditional.
216		-|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the [[Attribute>>doc:Glossary.Attribute.WebHome]].
217		-|(% style="width:211px" %) |(% style="width:235px" %)Usage|(% style="width:534px" %)Defines whether a Data [[Attribute>>doc:Glossary.Attribute.WebHome]] must be reported or not.
218		-|(% style="width:211px" %) |(% style="width:235px" %)+relatedTo|(% style="width:534px" %)Association to an [[Attribute>>doc:Glossary.Attribute.WebHome]] Relationship.
219		-|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) which defines the semantic of the [[component>>doc:Glossary.Component.WebHome]].
220		-|(% style="width:211px" %)[[Measure>>doc:Glossary.Measure.WebHome]]|(% style="width:235px" %)(((
	214	+|(% style="width:211px" %) |(% style="width:235px" %)/role|(% style="width:534px" %)Association to the Concept that specifies the role that that the Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] plays in the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
	215	+|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]. When equals to zero, the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is conditional.
	216	+|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]].
	217	+|(% style="width:211px" %) |(% style="width:235px" %)[[Usage>>doc:IMElements.Usage.WebHome]]|(% style="width:534px" %)Defines whether a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] must be reported or not.
	218	+|(% style="width:211px" %) |(% style="width:235px" %)+relatedTo|(% style="width:534px" %)Association to an [[Attribute Relationship>>doc:sdmx:Glossary 2\.1.Attribute relationship.WebHome]].
	219	+|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the Concept which defines the semantic of the component.
	220	+|(% style="width:211px" %)[[Measure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.Measure.WebHome]]|(% style="width:235px" %)(((
221	221	Inherits from
222		-//[[Component>>doc:Glossary.Component.WebHome]]//
223		-)))|(% style="width:534px" %)The metadata concept that is the phenomenon to be measured in a [[data set>>doc:Glossary.Data set.WebHome]]. In a [[data set>>doc:Glossary.Data set.WebHome]] the instance of the [[measure>>doc:Glossary.Measure.WebHome]] is often called the observation.
224		-|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) which carries the values of the [[measures>>doc:Glossary.Measure.WebHome]].
225		-|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the [[Measure>>doc:Glossary.Measure.WebHome]]. When equals to zero, the [[Measure>>doc:Glossary.Measure.WebHome]] is conditional.
226		-|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the [[Measure>>doc:Glossary.Measure.WebHome]].
227		-|(% style="width:211px" %) |(% style="width:235px" %)Usage|(% style="width:534px" %)Defines whether a [[Measure>>doc:Glossary.Measure.WebHome]] must be reported or not.
228		-|(% style="width:211px" %)//AttributeRelationship//|(% style="width:235px" %)(((
	222	+//[[Component>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.WebHome]]//
	223	+)))|(% style="width:534px" %)The metadata concept that is the phenomenon to be measured in a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]. In a [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] the instance of the measure is often called the observation.
	224	+|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the Concept which carries the values of the measures.
	225	+|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the Measure. When equals to zero, the Measure is conditional.
	226	+|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the Measure.
	227	+|(% style="width:211px" %) |(% style="width:235px" %)[[Usage>>doc:IMElements.Usage.WebHome]]|(% style="width:534px" %)Defines whether a Measure must be reported or not.
	228	+|(% style="width:211px" %)//[[AttributeRelationship>>doc:IMElements.AttributeRelationship.WebHome]]//|(% style="width:235px" %)(((
229	229	Abstract Class
230	230	Sub classes
231		-ObservationRelationship
232		-GroupRelationship DimensionRelationship
233		-)))|(% style="width:534px" %)Specifies the type of [[artefact>>doc:Glossary.Artefact.WebHome]] to which a Data [[Attribute>>doc:Glossary.Attribute.WebHome]] can be attached in a [[Data Set>>doc:Glossary.Data set.WebHome]].
234		-|(% style="width:211px" %)ObservationRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is related to the observations of the [[Data Set>>doc:Glossary.Data set.WebHome]].
235		-|(% style="width:211px" %)GroupRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is related to a Group [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor construct.
236		-|(% style="width:211px" %) |(% style="width:235px" %)+groupKey|(% style="width:534px" %)An association to the Group [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor
237		-|(% style="width:211px" %)DimensionRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is related to a set of [[Dimensions>>doc:Glossary.Dimension.WebHome]].
238		-|(% style="width:211px" %) |(% style="width:235px" %)+dimensions|(% style="width:534px" %)Association to the set of [[Dimensions>>doc:Glossary.Dimension.WebHome]] to which the Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is related.
239		-|(% style="width:211px" %) |(% style="width:235px" %)+groupKey|(% style="width:534px" %)Association to the Group [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor which specifies the set of [[Dimensions>>doc:Glossary.Dimension.WebHome]] to which the Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is attached.
240		-|(% style="width:211px" %)MeasureRelationship|(% style="width:235px" %) |(% style="width:534px" %)The [[Measures>>doc:Glossary.Measure.WebHome]] that a Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is reported for.
241		-|(% style="width:211px" %) |(% style="width:235px" %)+measures|(% style="width:534px" %)Association to the set of [[Measures>>doc:Glossary.Measure.WebHome]] to which a Data [[Attribute>>doc:Glossary.Attribute.WebHome]] is related to.
242		-|(% style="width:211px" %)SentinelValuesType|(% style="width:235px" %) |(% style="width:534px" %)This [[facet>>doc:Glossary.Facet.WebHome]] indicates that an [[Attribute>>doc:Glossary.Attribute.WebHome]] or a [[Measure>>doc:Glossary.Measure.WebHome]] has sentinel values with special meaning within their data type. This is realised by providing such values within the TextFormat, in addition to any textType or other [[Facet>>doc:Glossary.Facet.WebHome]].
243		-|(% style="width:211px" %)SentinelValue|(% style="width:235px" %) |(% style="width:534px" %)A value that has a special meaning within the text format [[representation>>doc:Glossary.Representation.WebHome]] of the [[Component>>doc:Glossary.Component.WebHome]].
	231	+[[ObservationRelationship>>doc:IMElements.AttributeRelationship.ObservationRelationship.WebHome]]
	232	+[[GroupRelationship>>doc:IMElements.AttributeRelationship.GroupRelationship.WebHome]] [[DimensionRelationship>>doc:IMElements.AttributeRelationship.DimensionRelationship.WebHome]]
	233	+)))|(% style="width:534px" %)Specifies the type of [[artefact>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]] to which a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] can be attached in a [[Data Set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]].
	234	+|(% style="width:211px" %)[[ObservationRelationship>>doc:IMElements.AttributeRelationship.ObservationRelationship.WebHome]]|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to the observations of the [[Data Set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]].
	235	+|(% style="width:211px" %)[[GroupRelationship>>doc:IMElements.AttributeRelationship.GroupRelationship.WebHome]]|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to a Group Dimension Descriptor construct.
	236	+|(% style="width:211px" %) |(% style="width:235px" %)+groupKey|(% style="width:534px" %)An association to the Group Dimension Descriptor
	237	+|(% style="width:211px" %)[[DimensionRelationship>>doc:IMElements.AttributeRelationship.DimensionRelationship.WebHome]]|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to a set of Dimensions.
	238	+|(% style="width:211px" %) |(% style="width:235px" %)+dimensions|(% style="width:534px" %)Association to the set of Dimensions to which the Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related.
	239	+|(% style="width:211px" %) |(% style="width:235px" %)+groupKey|(% style="width:534px" %)Association to the Group Dimension Descriptor which specifies the set of Dimensions to which the Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is attached.
	240	+|(% style="width:211px" %)[[MeasureRelationship>>doc:IMElements.AttributeRelationship.MeasureRelationship.WebHome]]|(% style="width:235px" %) |(% style="width:534px" %)The Measures that a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported for.
	241	+|(% style="width:211px" %) |(% style="width:235px" %)+measures|(% style="width:534px" %)Association to the set of Measures to which a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to.
	242	+|(% style="width:211px" %)SentinelValuesType|(% style="width:235px" %) |(% style="width:534px" %)This facet indicates that an [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] or a Measure has sentinel values with special meaning within their data type. This is realised by providing such values within the TextFormat, in addition to any textType or other Facet.
	243	+|(% style="width:211px" %)[[SentinelValue>>doc:IMElements.SentinelValue.WebHome]]|(% style="width:235px" %) |(% style="width:534px" %)A value that has a special meaning within the text format representation of the Component.
244	244	|(% style="width:211px" %) |(% style="width:235px" %)+name|(% style="width:534px" %)An association of a Sentinel Value to a multilingual name.
245	245	|(% style="width:211px" %) |(% style="width:235px" %)+description|(% style="width:534px" %)An association of a Sentinel Value to a multilingual description.
246	246
247		-The explanation of the classes, [[attributes>>doc:Glossary.Attribute.WebHome]], and associations comprising the [[Representation>>doc:Glossary.Representation.WebHome]] is described in the section on the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base.
	247	+The explanation of the classes, [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]], and associations comprising the [[Representation>>doc:IMElements.Representation.WebHome]] is described in the section on the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base
248	248
	249	+.
	250	+
249	249	== 5.4 Data Set – Relationship View ==
250	250
251	251	=== 5.4.1 Context ===