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Last modified by Helena K. on 2026/06/08 17:06
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edited by Helena K.
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To version 21.4
edited by Helena K.
on 2026/06/08 17:02
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70 70  ==== 7.3.4.1 Narrative ====
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72 -In brief, a MetadataStructureDefinition ([[MSD>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]) defines the MetadataAttributes, within an MetadataAttributeDescriptor, that can be associated with the objects identified in the [[Metadataflows>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]] and MetadataProvisionAgreements that refer to the [[MSD>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]. The [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of the MetadataAttributes is specified within the MetadataAttributeDescriptor.
72 +In brief, a MetadataStructureDefinition (MSD) defines the MetadataAttributes, within an MetadataAttributeDescriptor, that can be associated with the objects identified in the Metadataflows and MetadataProvisionAgreements that refer to the MSD. The hierarchy of the MetadataAttributes is specified within the MetadataAttributeDescriptor.
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74 -The MetadataAttributeDescriptor comprises a set of MetadataAttributes – these can be defined as a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]]. Each MetadataAttribute identifies a [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] that is reported or disseminated in a MetadataSet (/conceptIdentity) that uses this MetadataStructureDefinition. Different MetadataAttributes in the same MetadataAttributeDescriptor can use [[Concepts>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] from different ConceptSchemes. Note that a MetadataAttribute does not link to a [[Concept>>doc:sdmx:Glossary 2\.1.Concept.WebHome]] that defines its role in this MetadataStructureDefinition (i.e., the MetadataAttribute does not play a role).
74 +The MetadataAttributeDescriptor comprises a set of MetadataAttributes – these can be defined as a hierarchy. Each MetadataAttribute identifies a Concept that is reported or disseminated in a MetadataSet (/conceptIdentity) that uses this MetadataStructureDefinition. Different MetadataAttributes in the same MetadataAttributeDescriptor can use Concepts from different ConceptSchemes. Note that a MetadataAttribute does not link to a Concept that defines its role in this MetadataStructureDefinition (i.e., the MetadataAttribute does not play a role).
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76 -The MetadataAttribute can be specified as having multiple occurrences and/or specified as being mandatory (minOccurs=1 or more) or optional (minOccurs=0). A hierarchical MetadataStructureDefinition can be defined by specifying a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] for a MetadataAttribute.
76 +The MetadataAttribute can be specified as having multiple occurrences and/or specified as being mandatory (minOccurs=1 or more) or optional (minOccurs=0). A hierarchical MetadataStructureDefinition can be defined by specifying a hierarchy for a MetadataAttribute.
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78 -It can be seen from this, that the specification of the objects to which a MetadataAttribute can be attached is indirect: the MetadataAttributes are defined in a MetadataStructureDefinition, but they are attached to one or more IdentifiableArtefacts as defined in the [[Metadataflows>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]] or
78 +It can be seen from this, that the specification of the objects to which a MetadataAttribute can be attached is indirect: the MetadataAttributes are defined in a MetadataStructureDefinition, but they are attached to one or more IdentifiableArtefacts as defined in the Metadataflows or
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80 80  MetadataProvisionAgreements. This gives a flexible mechanism by which the actual objects need not be defined in concrete terms in the model but are defined dynamically by the IdentifiableObjectSelection. In this way, the MetadataStructureDefinition can be used to define any set of MetadataAttributes regardless of the objects to which they can be attached.
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82 -Each MetadataAttribute can have a [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] specified (using the /localRepresentation association). If this is not specified in the MetadataStructureDefinition then the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is taken from that defined for the (% style="color:#e74c3c" %)Concept(%%) (the coreRepresentation association).
82 +Each MetadataAttribute can have a Representation specified (using the /localRepresentation association). If this is not specified in the MetadataStructureDefinition then the Representation is taken from that defined for the Concept (the coreRepresentation association).
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84 -The definition of the various types of [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] can be found in the specification of the Base constructs. Note that if the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is non-enumerated then the association is to the ExtendedFacet (which allows for XHTML as a FacetValueType). If the [[Representation>>doc:sdmx:Glossary 2\.1.Representation.WebHome]] is enumerated, then is must use a [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]].
84 +The definition of the various types of Representation can be found in the specification of the Base constructs. Note that if the Representation is non-enumerated then the association is to the ExtendedFacet (which allows for XHTML as a FacetValueType). If the Representation is enumerated, then is must use a Codelist.
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86 -The [[Metadataflow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]] is linked to a MetadataStructureDefinition. The [[Metadataflow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]], in addition to the [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] inherited from the Base classes, it also has a list of IdentifiableObjectSelection constructs, which resolve into the IdentifiableArtefacts that the Metadatasets will refer to. The IdentifiableObjectSelection acts like a reference, but it may also include wildcarding part of the reference terms.
86 +The Metadataflow is linked to a MetadataStructureDefinition. The Metadataflow, in addition to the attributes inherited from the Base classes, it also has a list of IdentifiableObjectSelection constructs, which resolve into the IdentifiableArtefacts that the Metadatasets will refer to. The IdentifiableObjectSelection acts like a reference, but it may also include wildcarding part of the reference terms.
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88 -The MetadataProvisionAgreement is linked to a [[Metadataflow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]]. The former, like the [[Metadataflow>>doc:sdmx:Glossary 2\.1.Metadataflow.WebHome]], may have IdentifiableObjectSelection constructs to be used for specifying the proper targets for [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]].
88 +The MetadataProvisionAgreement is linked to a Metadataflow. The former, like the Metadataflow, may have IdentifiableObjectSelection constructs to be used for specifying the proper targets for reference metadata.
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90 90  ==== 7.3.4.2 Definitions ====
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