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4 4  
5 5  == 7.1 Context ==
6 6  
7 -Besides the possibility to extend the [[components>>doc:Glossary.Component.WebHome]] of [[Data Structure Definitions>>doc:Glossary.Data structure definition.WebHome]] by metadata [[attributes>>doc:Glossary.Attribute.WebHome]] defined in [[Metadata Structure Definitions>>doc:Glossary.Metadata structure definition.WebHome]], the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] metamodel allows metadata to describe any [[identifiable artefact>>doc:Glossary.Identifiable artefact.WebHome]]. These metadata can be:
7 +Besides the possibility to extend the [[components>>doc:IMElements.components.WebHome]] of [[Data Structure Definitions>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] by [[metadata>>doc:IMElements.metadata.WebHome]] [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] defined in [[Metadata Structure Definitions>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]], the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] metamodel allows [[metadata>>doc:IMElements.metadata.WebHome]] to describe any [[identifiable artefact>>doc:sdmx:Glossary 2\.1.Identifiable artefact.WebHome]]. These [[metadata>>doc:IMElements.metadata.WebHome]] can be:
8 8  
9 9  1. Exchanged without the need to embed it within the object that it is describing.
10 -1. Stored separately from the object that it describes, yet be linked to it (for example, an organisation has a [[metadata repository>>doc:Glossary.Metadata repository.WebHome]] which supports the dissemination of metadata resulting from metadata requests generated by systems or services that have access to the object for which the metadata pertains. This is common in web dissemination where additional metadata is available for viewing (and eventually downloading) by clicking on an “information” icon next to the object to which the metadata is attached).
11 -1. Versioned and maintained like [[structural metadata>>doc:Glossary.Structural metadata.WebHome]], but from Metadata Providers than Agencies.
12 -1. Reported according to a defined structure.
10 +1. Stored separately from the object that it describes, yet be linked to it (for example, an organisation has a [[metadata repository>>doc:sdmx:Glossary 2\.1.Metadata repository.WebHome]] which supports the dissemination of [[metadata>>doc:IMElements.metadata.WebHome]] resulting from [[metadata>>doc:IMElements.metadata.WebHome]] requests generated by systems or services that have access to the object for which the [[metadata>>doc:IMElements.metadata.WebHome]] pertains. This is common in web dissemination where additional [[metadata>>doc:IMElements.metadata.WebHome]] is available for viewing (and eventually downloading) by clicking on an “information” icon next to the object to which the [[metadata>>doc:IMElements.metadata.WebHome]] is attached).
11 +1. Versioned and maintained like [[structural metadata>>doc:sdmx:Glossary 2\.1.Structural metadata.WebHome]], but from Metadata Providers than Agencies.
12 +1. Reported according to a defined [[structure>>doc:IMElements.structure.WebHome]].
13 13  
14 14  In order to achieve this, the following structures are modelled:
15 15  
16 -* The [[Metadata Structure Definition>>doc:Glossary.Metadata structure definition.WebHome]] which comprises the metadata [[attributes>>doc:Glossary.Attribute.WebHome]] that can be attached to the various object types (these [[attributes>>doc:Glossary.Attribute.WebHome]] can be structured in a [[hierarchy>>doc:Glossary.Hierarchy.WebHome]]), together with any (% style="color:#e74c3c" %)[[constraints>>doc:Glossary.Constraint.WebHome]](%%) that may apply (e.g., association to a [[code list>>doc:Glossary.Code list.WebHome]] that contains valid values for the [[attribute>>doc:Glossary.Attribute.WebHome]] when reported in a [[metadata set>>doc:Glossary.Metadata set.WebHome]]),
17 -* The [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and/or Metadata [[Provision Agreement>>doc:Glossary.Provision agreement.WebHome]], which contains the objects to which the metadata are to be associated (attached),
18 -* The [[Metadata Set>>doc:Glossary.Metadata set.WebHome]], which contains reported metadata.
16 +* The [[Metadata Structure Definition>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]] which comprises the [[metadata>>doc:IMElements.metadata.WebHome]] [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] that can be attached to the various object types (these [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] can be structured in a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]]), together with any [[constraints>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]] that may apply (e.g., association to a [[code list>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] that contains valid values for the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] when reported in a [[metadata set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]]),
17 +* The [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]] and/or Metadata [[Provision Agreement>>doc:sdmx:Glossary 2\.1.Provision agreement.WebHome]], which contains the objects to which the [[metadata>>doc:IMElements.metadata.WebHome]] are to be associated (attached),
18 +* The [[Metadata Set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]], which contains reported [[metadata>>doc:IMElements.metadata.WebHome]].
19 19  
20 20  == 7.2 Inheritance ==
21 21  
22 22  === 7.2.1 Introduction ===
23 23  
24 -As with the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]] Structure, many of the constructs in this layer of the model inherit from the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base layer. Therefore, it is necessary to study both the inheritance and the relationship diagrams to understand the functionality of individual packages. The diagram below shows the full inheritance tree for the classes concerned with the MetadataStructureDefinition, the MetadataProvisionAgreement, the [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and the MetadataSet.
24 +As with the [[Data Structure Definition>>doc:sdmx:Glossary 2\.1.Data structure definition.WebHome]] [[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]], many of the constructs in this layer of the model inherit from the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base layer. Therefore, it is necessary to study both the inheritance and the relationship diagrams to understand the functionality of individual packages. The diagram below shows the full inheritance tree for the classes concerned with the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]], the [[MetadataProvisionAgreement>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataProvisionAgreement.WebHome]], the [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]] and the [[MetadataSet>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataSet.WebHome]].
25 25  
26 -There are very few additional classes in the MetadataStructureDefinition package that do not themselves inherit from classes in the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base. In other words, the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base gives most of the structure of this sub model both in terms of associations and in terms of [[attributes>>doc:Glossary.Attribute.WebHome]]. The relationship diagrams shown in this section show clearly when these associations are inherited from the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base (see the Appendix “A Short Guide to UML in the [[SDMX Information Model>>doc:Glossary.SDMX Information Model.WebHome]]” to see the diagrammatic notation used to depict this).
26 +There are very few additional classes in the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] package that do not themselves inherit from classes in the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base. In other words, the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base gives most of the [[structure>>doc:IMElements.structure.WebHome]] of this sub model both in terms of associations and in terms of [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]. The relationship diagrams shown in this section show clearly when these associations are inherited from the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base (see the Appendix “A Short Guide to UML in the [[SDMX Information Model>>doc:sdmx:Glossary 2\.1.SDMX Information Model.WebHome]]” to see the diagrammatic notation used to depict this).
27 27  
28 28  === 7.2.2 Class Diagram - Inheritance ===
29 29  
... ... @@ -37,15 +37,15 @@
37 37  
38 38  It is important to the understanding of the relationship class diagrams presented in this section to identify the concrete classes that inherit from the abstract classes.
39 39  
40 -The concrete classes in this part of the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] metamodel, which require to be maintained by [[Maintenance Agencies>>doc:Glossary.Maintenance agency.WebHome]], all inherit from MaintainableArtefact. These are:
40 +The concrete classes in this part of the [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] metamodel, which require to be maintained by [[Maintenance Agencies>>doc:sdmx:Glossary 2\.1.Maintenance agency.WebHome]], all inherit from [[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]. These are:
41 41  
42 -//StructureUsage// (concrete class is [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]])
43 -//Structure// (concrete class is MetadataStructureDefinition)
44 -MetadataProvisionAgreement
42 +//[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]// (concrete class is [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]])
43 +//[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// (concrete class is [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]])
44 +[[MetadataProvisionAgreement>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataProvisionAgreement.WebHome]]
45 45  
46 -These classes also inherit the identity and versioning [[facets>>doc:Glossary.Facet.WebHome]] of //IdentifiableArtefact//, //NameableArtefact// and //VersionableArtefact//.
46 +These classes also inherit the identity and versioning facets of //[[IdentifiableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.WebHome]]//, //[[NameableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.WebHome]]// and //[[VersionableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.WebHome]]//.
47 47  
48 -A //Structure// may contain several lists of [[components>>doc:Glossary.Component.WebHome]]. In this case the MetadataStructureDefinition acts as a list and contains //Component//s, i.e., MetadataAttributes.
48 +A //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// may contain several lists of [[components>>doc:IMElements.components.WebHome]]. In this case the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] acts as a list and contains //Component//s, i.e., MetadataAttributes.
49 49  
50 50  == 7.3 Metadata Structure Definition ==
51 51  
... ... @@ -55,7 +55,7 @@
55 55  
56 56  === 7.3.2 Structures Already Described ===
57 57  
58 -The MetadataStructureDefinition only contains MetadataAttributes, since target objects are contained in [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] and MetadataProvisionAgreement, since [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] 3.0.
58 +The [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] only contains MetadataAttributes, since target objects are contained in [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]] and [[MetadataProvisionAgreement>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataProvisionAgreement.WebHome]], since [[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] 3.0.
59 59  
60 60  === 7.3.3 Class Diagram – Relationship ===
61 61  
... ... @@ -67,56 +67,56 @@
67 67  
68 68  ==== 7.3.4.1 Narrative ====
69 69  
70 -In brief, a MetadataStructureDefinition ([[MSD>>doc:Glossary.Metadata structure definition.WebHome]]) defines the MetadataAttributes, within an MetadataAttributeDescriptor, that can be associated with the objects identified in the [[Metadataflows>>doc:Glossary.Metadataflow.WebHome]] and MetadataProvisionAgreements that refer to the [[MSD>>doc:Glossary.Metadata structure definition.WebHome]]. The [[hierarchy>>doc:Glossary.Hierarchy.WebHome]] of the MetadataAttributes is specified within the MetadataAttributeDescriptor.
70 +In brief, a [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] ([[MSD>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]]) defines the MetadataAttributes, within an [[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]], that can be associated with the objects identified in the Metadataflows 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>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]].
71 71  
72 -The MetadataAttributeDescriptor comprises a set of MetadataAttributes – these can be defined as a [[hierarchy>>doc:Glossary.Hierarchy.WebHome]]. Each MetadataAttribute identifies a (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) that is reported or disseminated in a MetadataSet (/conceptIdentity) that uses this MetadataStructureDefinition. Different MetadataAttributes in the same MetadataAttributeDescriptor can use (% style="color:#e74c3c" %)[[Concepts>>doc:Glossary.Concept.WebHome]](%%) from different ConceptSchemes. Note that a MetadataAttribute does not link to a (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) that defines its role in this MetadataStructureDefinition (i.e., the MetadataAttribute does not play a role).
72 +The [[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]] comprises a set of MetadataAttributes – these can be defined as a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]]. Each [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] identifies a [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] that is reported or disseminated in a [[MetadataSet>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataSet.WebHome]] (/conceptIdentity) that uses this [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]]. Different MetadataAttributes in the same [[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]] can use Concepts from different ConceptSchemes. Note that a [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] does not link to a [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] that defines its [[role>>doc:IMElements.role.WebHome]] in this [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] (i.e., the [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] does not play a [[role>>doc:IMElements.role.WebHome]]).
73 73  
74 -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:Glossary.Hierarchy.WebHome]] for a MetadataAttribute.
74 +The [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] can be specified as having multiple occurrences and/or specified as being mandatory (minOccurs=1 or more) or optional (minOccurs=0). A hierarchical [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] can be defined by specifying a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] for a [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]].
75 75  
76 -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:Glossary.Metadataflow.WebHome]] or
76 +It can be seen from this, that the specification of the objects to which a [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] can be attached is indirect: the MetadataAttributes are defined in a [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]], but they are attached to one or more IdentifiableArtefacts as defined in the Metadataflows or
77 77  
78 -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.
78 +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>>doc:IMElements.IdentifiableObjectSelection.WebHome]]. In this way, the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] can be used to define any set of MetadataAttributes regardless of the objects to which they can be attached.
79 79  
80 -Each MetadataAttribute can have a [[Representation>>doc:Glossary.Representation.WebHome]] specified (using the /localRepresentation association). If this is not specified in the MetadataStructureDefinition then the [[Representation>>doc:Glossary.Representation.WebHome]] is taken from that defined for the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) (the coreRepresentation association).
80 +Each [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] can have a [[Representation>>doc:IMElements.Representation.WebHome]] specified (using the /localRepresentation association). If this is not specified in the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]] then the [[Representation>>doc:IMElements.Representation.WebHome]] is taken from that defined for the [[Concept>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Concept.WebHome]] (the [[coreRepresentation>>doc:IMElements.coreRepresentation.WebHome]] association).
81 81  
82 -The definition of the various types of [[Representation>>doc:Glossary.Representation.WebHome]] can be found in the specification of the Base constructs. Note that if the [[Representation>>doc:Glossary.Representation.WebHome]] is non-enumerated then the association is to the ExtendedFacet (which allows for XHTML as a FacetValueType). If the [[Representation>>doc:Glossary.Representation.WebHome]] is enumerated, then is must use a Codelist.
82 +The definition of the various types of [[Representation>>doc:IMElements.Representation.WebHome]] can be found in the specification of the Base constructs. Note that if the [[Representation>>doc:IMElements.Representation.WebHome]] is non-[[enumerated>>doc:IMElements.enumerated.WebHome]] then the association is to the [[ExtendedFacet>>doc:IMElements.ExtendedFacet.WebHome]] (which allows for XHTML as a FacetValueType). If the [[Representation>>doc:IMElements.Representation.WebHome]] is [[enumerated>>doc:IMElements.enumerated.WebHome]], then is must use a [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]].
83 83  
84 -The [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] is linked to a MetadataStructureDefinition. The [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]], in addition to the [[attributes>>doc:Glossary.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.
84 +The [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]] is linked to a [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]]. The [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.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>>doc:IMElements.IdentifiableObjectSelection.WebHome]] constructs, which resolve into the IdentifiableArtefacts that the Metadatasets will refer to. The [[IdentifiableObjectSelection>>doc:IMElements.IdentifiableObjectSelection.WebHome]] acts like a reference, but it may also include wildcarding part of the reference terms.
85 85  
86 -The MetadataProvisionAgreement is linked to a [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]. The former, like the [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]], may have IdentifiableObjectSelection constructs to be used for specifying the proper targets for reference metadata.
86 +The [[MetadataProvisionAgreement>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataProvisionAgreement.WebHome]] is linked to a [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]]. The former, like the [[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]], may have [[IdentifiableObjectSelection>>doc:IMElements.IdentifiableObjectSelection.WebHome]] constructs to be used for specifying the proper targets for [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]].
87 87  
88 88  ==== 7.3.4.2 Definitions ====
89 89  
90 90  (% style="width:975.835px" %)
91 91  |**Class**|**Feature**|(% style="width:574px" %)**Description**
92 -|//StructureUsage//| |(% style="width:574px" %)See “[[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Base”.
93 -|[[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]|(((
92 +|//[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]//| |(% style="width:574px" %)See “[[SDMX>>doc:sdmx:Glossary 2\.1.Statistical data and metadata exchange.WebHome]] Base”.
93 +|[[Metadataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Metadataflow.WebHome]]|(((
94 94  Inherits from:
95 -//StructureUsage//
96 -)))|(% style="width:574px" %)Abstract concept (i.e., the structure without any metadata) of a flow of metadata that providers will provide for different [[reference periods>>doc:Glossary.Reference period.WebHome]]. Specifies possible targets for metadata, via the Identifiable Object Selection.
97 -| |/structure|(% style="width:574px" %)Associates a [[Metadata Structure Definition>>doc:Glossary.Metadata structure definition.WebHome]].
98 -|MetadataProvisionAgreement| |(% style="width:574px" %)Links the Metadata Provider to the relevant Structure Usage (i.e., [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]) for which the provider supplies metadata. The agreement may constrain the scope of the metadata that can be provided, by means of a (% style="color:#e74c3c" %)[[Constraint>>doc:Glossary.Constraint.WebHome]](%%). Specifies possible targets for metadata, via the Identifiable Object Selection.
99 -|MetadataProvider| |(% style="width:574px" %)See Organisation Scheme.
100 -|IdentifiableObjectSelection| |(% style="width:574px" %)A list or wildcarded expression resolving into Identifiable Objects that metadata will refer to.
101 -|MetadataStructureDefinition|(((
95 +//[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]//
96 +)))|(% style="width:574px" %)Abstract concept (i.e., the structure without any metadata) of a flow of metadata that providers will provide for different [[reference periods>>doc:sdmx:Glossary 2\.1.Reference period.WebHome]]. Specifies possible targets for metadata, via the Identifiable Object Selection.
97 +| |/[[structure>>doc:IMElements.structure.WebHome]]|(% style="width:574px" %)Associates a [[Metadata Structure Definition>>doc:sdmx:Glossary 2\.1.Metadata structure definition.WebHome]].
98 +|[[MetadataProvisionAgreement>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.MetadataProvisionAgreement.WebHome]]| |(% style="width:574px" %)Links the Metadata Provider to the relevant Structure Usage (i.e., Metadataflow) for which the provider supplies metadata. The agreement may constrain the scope of the metadata that can be provided, by means of a [[Constraint>>doc:sdmx:Glossary 2\.1.Constraint.WebHome]]. Specifies possible targets for metadata, via the Identifiable Object Selection.
99 +|[[MetadataProvider>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Organisation.MetadataProvider.WebHome]]| |(% style="width:574px" %)See Organisation Scheme.
100 +|[[IdentifiableObjectSelection>>doc:IMElements.IdentifiableObjectSelection.WebHome]]| |(% style="width:574px" %)A list or wildcarded expression resolving into Identifiable Objects that metadata will refer to.
101 +|[[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]]|(((
102 102  Inherits from:
103 -//MaintainableArtefact//
104 -)))|(% style="width:574px" %)A collection of metadata concepts and their structure when used to collect or disseminate reference metadata.
105 -|MetadataAttributeDescriptor|(((
103 +//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
104 +)))|(% style="width:574px" %)A collection of metadata concepts and their structure when used to collect or disseminate [[reference metadata>>doc:sdmx:Glossary 2\.1.Reference metadata.WebHome]].
105 +|[[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]]|(((
106 106  Inherits from:
107 107  
108 -//ComponentList//
109 -)))|(% style="width:574px" %)Defines a set of concepts that comprises the Metadata [[Attributes>>doc:Glossary.Attribute.WebHome]] to be reported.
110 -| |/components|(% style="width:574px" %)An association to the Metadata [[Attributes>>doc:Glossary.Attribute.WebHome]] relevant to the Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] Descriptor.
111 -|MetadataAttribute|// //|(% style="width:574px" %)Identifies a (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) for which a value may be reported in a [[Metadata Set>>doc:Glossary.Metadata set.WebHome]].
112 -| |/hierarchy|(% style="width:574px" %)Association to one or more child Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]].
113 -| |/conceptIdentity|(% style="width:574px" %)An association to the concept which defines the semantic of the [[attribute>>doc:Glossary.Attribute.WebHome]].
114 -| |isPresentational|(% style="width:574px" %)Indication that the Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] is present for structural purposes (i.e. it has child [[attributes>>doc:Glossary.Attribute.WebHome]]) and that no value for this [[attribute>>doc:Glossary.Attribute.WebHome]] is expected to be reported in a [[Metadata Set>>doc:Glossary.Metadata set.WebHome]].
115 -| |minOccurs maxOccurs|(% style="width:574px" %)(((
116 -Specifies how many occurrences of the Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] may be reported at this point in the Metadataset.
108 +//[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]//
109 +)))|(% style="width:574px" %)Defines a set of concepts that comprises the Metadata [[Attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] to be reported.
110 +| |/components|(% style="width:574px" %)An association to the Metadata [[Attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] relevant to the Metadata [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] Descriptor.
111 +|[[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]]|// //|(% style="width:574px" %)Identifies a Concept for which a value may be reported in a [[Metadata Set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]].
112 +| |/hierarchy|(% style="width:574px" %)Association to one or more child Metadata [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]].
113 +| |/conceptIdentity|(% style="width:574px" %)An association to the concept which defines the semantic of the [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]].
114 +| |[[isPresentational>>doc:IMElements.isPresentational.WebHome]]|(% style="width:574px" %)Indication that the Metadata [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is present for structural purposes (i.e. it has child [[attributes>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]]) and that no value for this [[attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] is expected to be reported in a [[Metadata Set>>doc:sdmx:Glossary 2\.1.Metadata set.WebHome]].
115 +| |[[minOccurs>>doc:IMElements.minOccurs.WebHome]] [[maxOccurs>>doc:IMElements.maxOccurs.WebHome]]|(% style="width:574px" %)(((
116 +Specifies how many occurrences of the Metadata [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]] may be reported at this point in the Metadataset.
117 117  )))
118 -| |/localRepresentation|(% style="width:574px" %)Associates a [[Representation>>doc:Glossary.Representation.WebHome]] that overrides any core [[representation>>doc:Glossary.Representation.WebHome]] specified for the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) itself.
119 -|[[Representation>>doc:Glossary.Representation.WebHome]]| |(% style="width:574px" %)The [[representation>>doc:Glossary.Representation.WebHome]] of the Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]].
118 +| |/localRepresentation|(% style="width:574px" %)Associates a Representation that overrides any core representation specified for the Concept itself.
119 +|[[Representation>>doc:IMElements.Representation.WebHome]]| |(% style="width:574px" %)The representation of the Metadata [[Attribute>>doc:sdmx:Glossary 2\.1.Attribute.WebHome]].
120 120  
121 121  == 7.4 Metadata Set ==
122 122  
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