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Last modified by Helena K. on 2026/06/08 16:58
From version 28.8
edited by Helena K.
on 2026/06/08 16:54
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To version 28.5
edited by Helena K.
on 2026/06/08 16:48
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121 121  
122 122  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.
123 123  
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 [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] that identifies its role.
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.
125 125  
126 126  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.
127 127  
... ... @@ -141,16 +141,16 @@
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: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 applies to all data defined by the underlying [[Dataflow>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Dimension.WebHome]] (1..n)|(% style="width:537px" %)The value of the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] will vary with the value(s) of the referenced [[Dimension>>doc:sdmx:Glossary 2\.1.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 (% style="color:#e74c3c" %)l(%%)evel of the [[Dimension>>doc:sdmx:Glossary 2\.1.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 of the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] varies with combination of values for all of the [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] contained in the Group. This is added as a convenience to listing all [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] and the attachment Group, but should only be used when the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] value varies based on all Group [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] values.|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the level of Group.
147 -|Observation|(% style="width:537px" %)The value of the [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] varies with the observed value.|(% style="width:434px" %)The [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported at the level of Observation.
144 +|DataflowRelationship|(% style="width:537px" %)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:434px" %)The attribute is reported at the Dataset level.
145 +|Dimension (1..n)|(% style="width:537px" %)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:434px" %)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.
146 +|Group|(% style="width:537px" %)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:434px" %)The attribute is reported at the level of Group.
147 +|Observation|(% style="width:537px" %)The value of the Attribute varies with the observed value.|(% style="width:434px" %)The attribute is reported at the level of Observation.
148 148  
149 149  [[image:image56.png]]
150 150  
151 151  **Figure 30: Representation of DSD Components**
152 152  
153 -Each of [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]], TimeDimension, [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]], DataAttribute and MetadataAttribute can have a [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] specified (using the localRepresentation association). If this is not specified in the DataStructureDefinition then the [[representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] specified for [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] (coreRepresentation) is used. [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]], and DataAttribute may be also represented by multilingual text (as seen in the [[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] diagram further down). An exception is the MetadataAttribute, where its [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is specified in the MetadataStructureDefinition.
153 +Each of Dimension, TimeDimension, Measure, DataAttribute and MetadataAttribute can have a Representation specified (using the localRepresentation association). If this is not specified in the DataStructureDefinition then the representation specified for Concept (coreRepresentation) is used. Measure, and DataAttribute may be also represented by multilingual text (as seen in the DataSet diagram further down). An exception is the MetadataAttribute, where its Representation is specified in the MetadataStructureDefinition.
154 154  
155 155  A DataStructureDefinition can be extended to form a derived DataStructureDefinition. This is supported in the StructureMap.
156 156  
... ... @@ -158,93 +158,93 @@
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:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base”.
162 -|(% style="width:204px" %)[[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]]|(% style="width:236px" %)(((
161 +|(% style="width:204px" %)StructureUsage|(% style="width:236px" %) |(% style="width:538px" %)See “SDMX Base”.
162 +|(% style="width:204px" %)Dataflow|(% 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>>doc:sdmx:Glossary 2\.1.Reference period.WebHome]].
167 -|(% style="width:204px" %) |(% style="width:236px" %)/structure|(% style="width:538px" %)Associates a [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] 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>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] which the [[Dataflow>>doc:sdmx:Glossary 2\.1.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 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}}.
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 to the Data Structure Definition.
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: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>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] added without having to change its major [[version>>doc:sdmx:Glossary 2\.1.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.
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:sdmx:Glossary 2\.1.Dimension.WebHome]] Descriptor in a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
176 -|(% style="width:204px" %) |(% style="width:236px" %)/[[components>>doc:sdmx:Glossary 2\.1.Component.WebHome]]|(% style="width:538px" %)An association to the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] [[components>>doc:sdmx:Glossary 2\.1.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.
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>>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>>doc:sdmx:Glossary 2\.1.Component.WebHome]]|(% style="width:538px" %)An association to the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] and Time [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] comprising the Key Descriptor.
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, 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: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>>doc:sdmx:Glossary 2\.1.Component.WebHome]]|(% style="width:538px" %)An association to a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] [[component>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
185 +)))|(% style="width:538px" %)A set metadata concepts that define the Attributes of a Data Structure Definition.
186 +|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Data Attribute component.
187 187  |(% style="width:204px" %)MeasureDescriptor|(% style="width:236px" %)(((
188 188  Inherits from
189 189  //ComponentList//
190 -)))|(% style="width:538px" %)A metadata concept that defines the [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] of a [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]].
191 -|(% style="width:204px" %) |(% style="width:236px" %)/[[components>>doc:sdmx:Glossary 2\.1.Component.WebHome]]|(% style="width:538px" %)An association to a [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] [[component>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
190 +)))|(% style="width:538px" %)A metadata concept that defines the Measures of a Data Structure Definition.
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:sdmx:Glossary 2\.1.Component.WebHome]]//
194 +//Component//
195 195  Sub class
196 -[[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]]
196 +Dimension
197 197  TimeDimension
198 -)))|(% style="width:538px" %)An abstract class representing any [[Component>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Dimension.WebHome]] [[Components>>doc:sdmx:Glossary 2\.1.Component.WebHome]] within the [[DSD>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]]. The property is used to indicate the position of the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] [[Component>>doc:sdmx:Glossary 2\.1.Component.WebHome]] and determines the Key for identifying observations, or [[series>>doc:sdmx:Glossary 2\.1.Series.WebHome]]. The Time [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]], when specified, must be the last within the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] Descriptor.
200 -|(% style="width:211px" %)[[Dimension>>doc:sdmx:Glossary 2\.1.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|(% style="width:534px" %)Specifies the order of the Dimension Components within the DSD. The property is used to indicate the position of the Dimension Component and determines the Key for identifying observations, or series. The Time Dimension, when specified, must be the last within the Dimension Descriptor.
200 +|(% style="width:211px" %)Dimension|(% 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>>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>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] that specifies the role that that the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] 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>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]].
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 or a geographical reference area.
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.
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:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Component.WebHome]]//
212 +//Component//
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 [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] 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|(% 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>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] which defines the semantic of the [[component>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
220 -|(% style="width:211px" %)[[Measure>>doc:sdmx:Glossary 2\.1.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 plays in the Data Structure Definition.
215 +|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the Attribute. When equals to zero, the Attribute is conditional.
216 +|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the Attribute.
217 +|(% style="width:211px" %) |(% style="width:235px" %)Usage|(% style="width:534px" %)Defines whether a Data Attribute must be reported or not.
218 +|(% style="width:211px" %) |(% style="width:235px" %)+relatedTo|(% style="width:534px" %)Association to an Attribute Relationship.
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|(% style="width:235px" %)(((
221 221  Inherits from
222 -//[[Component>>doc:sdmx:Glossary 2\.1.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>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] is often called the observation.
224 -|(% style="width:211px" %) |(% style="width:235px" %)/conceptIdentity|(% style="width:534px" %)An association to the [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] which carries the values of the [[measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]].
225 -|(% style="width:211px" %) |(% style="width:235px" %)minOccurs|(% style="width:534px" %)Defines the minimum required occurrences for the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]]. When equals to zero, the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] is conditional.
226 -|(% style="width:211px" %) |(% style="width:235px" %)maxOccurs|(% style="width:534px" %)Defines the maximum allowed occurrences for the [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]].
227 -|(% style="width:211px" %) |(% style="width:235px" %)Usage|(% style="width:534px" %)Defines whether a [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] must be reported or not.
222 +//Component//
223 +)))|(% style="width:534px" %)The metadata concept that is the phenomenon to be measured in a data set. In a data set 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|(% style="width:534px" %)Defines whether a Measure must be reported or not.
228 228  |(% style="width:211px" %)//AttributeRelationship//|(% style="width:235px" %)(((
229 229  Abstract Class
230 230  Sub classes
231 231  ObservationRelationship
232 232  GroupRelationship DimensionRelationship
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|(% 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|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to a Group [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] Descriptor construct.
236 -|(% style="width:211px" %) |(% style="width:235px" %)+groupKey|(% style="width:534px" %)An association to the Group [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] Descriptor
237 -|(% style="width:211px" %)DimensionRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is related to a set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]].
238 -|(% style="width:211px" %) |(% style="width:235px" %)+[[dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]]|(% style="width:534px" %)Association to the set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] 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>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] Descriptor which specifies the set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] to which the Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is attached.
240 -|(% style="width:211px" %)MeasureRelationship|(% style="width:235px" %) |(% style="width:534px" %)The [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] that a Data [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is reported for.
241 -|(% style="width:211px" %) |(% style="width:235px" %)+[[measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]]|(% style="width:534px" %)Association to the set of [[Measures>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] 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>>doc:sdmx:Glossary 2\.1.Facet.WebHome]] indicates that an [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] or a [[Measure>>doc:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.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:sdmx:Glossary 2\.1.Representation.WebHome]] of the [[Component>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
233 +)))|(% style="width:534px" %)Specifies the type of artefact to which a Data Attribute can be attached in a Data Set.
234 +|(% style="width:211px" %)ObservationRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data Attribute is related to the observations of the Data Set.
235 +|(% style="width:211px" %)GroupRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Data Attribute 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|(% style="width:235px" %) |(% style="width:534px" %)The Data Attribute 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 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 is attached.
240 +|(% style="width:211px" %)MeasureRelationship|(% style="width:235px" %) |(% style="width:534px" %)The Measures that a Data Attribute 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 is related to.
242 +|(% style="width:211px" %)SentinelValuesType|(% style="width:235px" %) |(% style="width:534px" %)This facet indicates that an Attribute 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|(% 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:sdmx:Glossary 2\.1.Attribute.WebHome]], and associations comprising the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is described in the section on the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base.
247 +The explanation of the classes, attributes, and associations comprising the Representation is described in the section on the SDMX Base.
248 248  
249 249  == 5.4 Data Set – Relationship View ==
250 250  
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