Changes for page 5 Data Structure Definition and Dataset

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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 (% style="color:#e74c3c" %)Concept(%%) 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 [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] 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 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.
	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.
148	148
149	149	[[image:image56.png]]
150	150
151	151	**Figure 30: Representation of DSD Components**
152	152
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.
	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.
154	154
155	155	A DataStructureDefinition can be extended to form a derived DataStructureDefinition. This is supported in the StructureMap.
156	156
...	...	@@ -158,99 +158,99 @@
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 Base”.
162		-|(% style="width:204px" %)Dataflow|(% 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:sdmx:Glossary 2\.1.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 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}}.
	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}}.
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.
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.
	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.
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 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.
	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|(% 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.
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, 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.
	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>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] and Time [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] 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 of a Data Structure Definition.
186		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Data Attribute component.
	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>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
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 of a Data Structure Definition.
191		-|(% style="width:204px" %) |(% style="width:236px" %)/components|(% style="width:538px" %)An association to a Measure component.
	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|(% style="width:538px" %)An association to a [[Measure>>doc:sdmx:Glossary 2\.1.Measure.WebHome]] [[component>>doc:sdmx:Glossary 2\.1.Component.WebHome]].
192	192	|(% style="width:204px" %)//DimensionComponent//|(% style="width:236px" %)(((
193	193	Inherits from
194		-//Component//
	194	+//[[Component>>doc:sdmx:Glossary 2\.1.Component.WebHome]]//
195	195	Sub class
196		-Dimension
	196	+[[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]]
197	197	TimeDimension
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" %)(((
	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" %)(((
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 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.
	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]].
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 in the key structure that has the role of “time”.
	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”.
210	210	|(% style="width:211px" %)DataAttribute|(% style="width:235px" %)(((
211	211	Inherits from
212		-//Component//
	212	+//[[Component>>doc:sdmx:Glossary 2\.1.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 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" %)(((
	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" %)(((
221	221	Inherits from
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.
	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.
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 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.
	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|(% 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|(% 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]].
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, and associations comprising the Representation is described in the section on the SDMX Base.
	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.
248	248
249	249	== 5.4 Data Set – Relationship View ==
250	250
251	251	=== 5.4.1 Context ===
252	252
253		-A data set comprises the collection of data values and associated metadata that are collected or disseminated according to a known DataStructureDefinition.
	253	+A [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] comprises the collection of data values and associated metadata that are collected or disseminated according to a known DataStructureDefinition.
254	254
255	255	=== 5.4.2 Class Diagram ===
256	256
...	...	@@ -262,23 +262,23 @@
262	262
263	263	==== 5.4.3.1 Narrative – Data Set ====
264	264
265		-Note that the //DataSet// must conform to the DataStructureDefinition associated to the Dataflow for which this DataSet is an “instance of data”. Whilst the model shows the association to the classes of the DataStructureDefinition, this is for conceptual purposes to show the link to the DataStructureDefinition. In the actual //DataSet// as exchanged there must, of course, be a reference to the DataStructureDefinition and optionally a Dataflow or a ProvisionAgreement, but the DataStructureDefinition is not necessarily exchanged with the data. Therefore, the DataStructureDefinition classes are shown in the grey areas, as these are not a part of the //DataSet// when the //DataSet// is exchanged. However, the structural metadata in the DataStructureDefinition can be used by an application to validate the contents of the //DataSet// in terms of the valid content of a //KeyValue// as defined by the Representation in the DataStructureDefinition.
	265	+Note that the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// must conform to the DataStructureDefinition associated to the [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] for which this [[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] is an “instance of data”. Whilst the model shows the association to the classes of the DataStructureDefinition, this is for conceptual purposes to show the link to the DataStructureDefinition. In the actual //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// as exchanged there must, of course, be a reference to the DataStructureDefinition and optionally a [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]] or a ProvisionAgreement, but the DataStructureDefinition is not necessarily exchanged with the data. Therefore, the DataStructureDefinition classes are shown in the grey areas, as these are not a part of the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// when the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// is exchanged. However, the [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]] in the DataStructureDefinition can be used by an application to validate the contents of the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// in terms of the valid content of a //KeyValue// as defined by the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] in the DataStructureDefinition.
266	266
267		-An organisation playing the role of DataProvider can be responsible for one or more //DataSet//.
	267	+An organisation playing the role of DataProvider can be responsible for one or more //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//.
268	268
269		-A //DataSet// is formatted as a DataStructureDefinition specific data set (StructureSpecificDataSet). The structured data set is structured according to one specific DataStructureDefinition; hence the latter is required for validation at the syntax level.
	269	+A //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// is formatted as a DataStructureDefinition specific [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] (StructureSpecificDataSet). The structured [[data set>>doc:sdmx:Glossary 2\.1.Data set.WebHome]] is structured according to one specific DataStructureDefinition; hence the latter is required for validation at the syntax level.
270	270
271		-A //DataSet// is a collection of a set of //Observation//s that share the same dimensionality, which is specified by a set of unique components (Dimension, TimeDimension) defined in the DimensionDescriptor of the DataStructureDefinition, together with associated //AttributeValue//s that define specific characteristics about the artefact to which it is attached – //Observation//s, set of Dimensions. It can be structured in terms of a SeriesKey to which //Observation//s are reported.
	271	+A //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// is a collection of a set of //Observation//s that share the same dimensionality, which is specified by a set of unique [[components>>doc:sdmx:Glossary 2\.1.Component.WebHome]] ([[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]], TimeDimension) defined in the DimensionDescriptor of the DataStructureDefinition, together with associated //AttributeValue//s that define specific characteristics about the [[artefact>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]] to which it is attached – //Observation//s, set of [[Dimensions>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]]. It can be structured in terms of a SeriesKey to which //Observation//s are reported.
272	272
273		-The //Observation// can be the value(s) of the variable(s) being measured for the Concept associated to the Measure(s) in the MeasureDescriptor of the DataStructureDefinition. Each //Observation// associates one or more //ObservationValue//s with a KeyValue (+observationDimension) which is the value for the “Dimension at the Observation Level”. Any Dimension can be specified as being the “Dimension at the Observation Level”, and this specification is made at the level of the //DataSet// (i.e., it must be the same Dimension for the entire //DataSet//).
	273	+The //Observation// can be the value(s) of the variable(s) being measured for the [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] associated to the Measure(s) in the MeasureDescriptor of the DataStructureDefinition. Each //Observation// associates one or more //ObservationValue//s with a KeyValue (+observationDimension) which is the value for the “[[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] at the Observation Level”. Any [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] can be specified as being the “[[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] at the Observation Level”, and this specification is made at the level of the //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]// (i.e., it must be the same [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] for the entire //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//).
274	274
275		-The //KeyValue// is a value for one of TimeDimension or Dimension specified in the DataStructureDefinition. If it is a Dimension, it can be coded (CodedKeyValue) or uncoded (UncodedKeyValue). If it is the TimeDimension then it is a TimeKeyValue. The actual value that the CodedDimensionValue can take must be one of the Codes in the Codelist specified as the Representation of the Dimension in the DataStructureDefinition.
	275	+The //KeyValue// is a value for one of TimeDimension or [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] specified in the DataStructureDefinition. If it is a [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]], it can be coded (CodedKeyValue) or uncoded (UncodedKeyValue). If it is the TimeDimension then it is a TimeKeyValue. The actual value that the CodedDimensionValue can take must be one of the [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] in the [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] specified as the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] of the [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] in the DataStructureDefinition.
276	276
277	277	An ObservationValue can be coded – this is the CodedObservation – or it can be uncoded – this is the UncodedObservation. In the case of uncoded observations, the values may be multilingual – expressed via the TextMeasureValue – or not (OtherUncodedMeasureValue).
278	278
279		-The GroupKey is a subunit of the //Key// that has the same dimensionality as the SeriesKey but defines a subset of the KeyValues of the SeriesKey. Its sub dimension structure is defined in the GroupDimensionDescriptor of the DataStructureDefinition identified by the same id as the GroupKey. The id identifies a “type” of group and the purpose of the GroupKey is to report one or more //AttributeValue// that are contained at this group level. The GroupKey is present when the GroupDimensionDescriptor is related to the GroupRelationship in the DataStructureDefinition. There can be many types of groups in a //DataSet//. If the Group is related to the DimensionRelationship in the DataStructureDefinition then the //AttributeValue// will be reported with the appropriate dimension in the SeriesKey or Observation.
	279	+The GroupKey is a subunit of the //Key// that has the same dimensionality as the SeriesKey but defines a subset of the KeyValues of the SeriesKey. Its sub [[dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] structure is defined in the GroupDimensionDescriptor of the DataStructureDefinition identified by the same id as the GroupKey. The id identifies a “type” of group and the purpose of the GroupKey is to report one or more //AttributeValue// that are contained at this group level. The GroupKey is present when the GroupDimensionDescriptor is related to the GroupRelationship in the DataStructureDefinition. There can be many types of groups in a //[[DataSet>>doc:sdmx:Glossary 2\.1.Data set.WebHome]]//. If the Group is related to the DimensionRelationship in the DataStructureDefinition then the //AttributeValue// will be reported with the appropriate [[dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] in the SeriesKey or Observation.
280	280
281		-In this way each of SeriesKey, GroupKey, and Observation can have zero or more //AttributeValue//s that define some metadata about the object to which it is associated. The //AttributeValue// may be either a //DataAttributeValue// or a //MetadataAttributeValue//, representing values of DataAttributes defined in the DSD or MetadataAttributes of the linked MSD, respectively. The allowable Concepts and the objects to which these metadata can be associated (attached) are defined in the DataStructureDefinition and the linked MetadataStructureDefinition.
	281	+In this way each of SeriesKey, GroupKey, and Observation can have zero or more //AttributeValue//s that define some metadata about the object to which it is associated. The //AttributeValue// may be either a //DataAttributeValue// or a //MetadataAttributeValue//, representing values of DataAttributes defined in the [[DSD>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] or MetadataAttributes of the linked [[MSD>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]], respectively. The allowable [[Concepts>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] and the objects to which these metadata can be associated (attached) are defined in the DataStructureDefinition and the linked MetadataStructureDefinition.
282	282
283	283	The //AttributeValue// links to the object type (SeriesKey, GroupKey, Observation) to which it is associated.
284	284