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Last modified by Elena on 2025/09/10 11:19
From version 3.5
edited by Helena
on 2025/06/08 11:17
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To version 3.4
edited by Helena
on 2025/06/08 11:14
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75 75  Those concrete classes in the SDMX Data Structure Definition and Dataset packages of the metamodel which require to be maintained by Agencies all inherit (via other abstract classes) from //MaintainableArtefact//, these are:
76 76  
77 77  Dataflow
78 +
78 78  DataStructureDefinition
80 +
79 79  The component structures that are lists of lists, inherit directly from //Structure//. A //Structure// contains several lists of components. The concrete class that inherits from //Structure// is:
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80 80  DataStructureDefinition
81 81  
82 82  A DataStructureDefinition contains a list of dimensions, a list of measures and a list of attributes.
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84 84  The concrete classes which inherit from //ComponentList// and are subcomponents of the DataStructureDefinition are:
85 85  
86 86  DimensionDescriptor – content is Dimension and TimeDimension
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87 87  DimensionGroupDescriptor – content is an association to Dimension, TimeDimension
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88 88  MeasureDescriptor – content is Measure
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89 89  AttributeDescriptor – content is DataAttribute and an association to MetadataAttribute
90 90  
91 91  The classes that inherit from //Component// are:
92 92  
93 93  Measure
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94 94  //DimensionComponent// and thereby its sub classes of Dimension and TimeDimension
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95 95  //Attribute// and thereby its sub classes of DataAttribute and MetadataAttribute
96 96  
97 97  The concrete classes identified above are the majority of the classes required to define the metamodel for the DataStructureDefinition. The diagrams and explanations in the rest of this section show how these concrete classes are related in order to support the functionality required.
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151 151  
152 152  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.
153 153  
154 -(% style="width:1142.83px" %)
155 -|**Relationship**|(% style="width:537px" %)**Meaning**|(% style="width:434px" %)**Location in Data Set at which the Attribute is reported**
156 -|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.
157 -|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.
158 -|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.
159 -|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.
162 +|**Relationship**|**Meaning**|**Location in Data Set at which the Attribute is reported**
163 +|DataflowRelationship|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.|The attribute is reported at the Dataset level.
164 +|Dimension (1..n)|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.|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.
165 +|Group|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.|The attribute is reported at the level of Group.
166 +|Observation|The value of the Attribute varies with the observed value.|The attribute is reported at the level of Observation.
160 160  
161 161  [[image:1749246368790-555.jpeg]]
162 162  
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216 216  TimeDimension
217 217  )))|An abstract class representing any Component that can be used for identifying observations.
218 218  
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227 +
228 +
219 219  |**Class**|**Feature**|**Description**
220 220  | |Order|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.
221 221  |Dimension|(((
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308 308  
309 309  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.
310 310  
311 -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.
321 +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.
312 312  
313 313  The //AttributeValue// links to the object type (SeriesKey, GroupKey, Observation) to which it is associated.
314 314