Changes for page 5 Reference Metadata

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1		-Artefact|Attribute|Attribute relationship|Component|Data set|Data structure definition|Hierarchy|Maintainable artefact|Metadata set|Metadata structure definition|Metadataflow|Provision agreement|SDMX-ML|Statistical data and metadata exchange

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5	5	== 5.1 Scope of the Metadata Structure Definition (MSD) ==
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7		-The scope of the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] is reduced in [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0, by means of simplifying its structure, but also in the way referenced [[Artefacts>>doc:sdmx:Glossary.Artefact.WebHome]] are targeted. In fact, the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] is restricted to play the role of a single container, without targeting any specific [[Artefact>>doc:sdmx:Glossary.Artefact.WebHome]]. The possible targets of [[Metadata Set>>doc:sdmx:Glossary.Metadata set.WebHome]] are specified in the [[Metadataflows>>doc:sdmx:Glossary.Metadataflow.WebHome]] or Metadata [[Provision Agreements>>doc:sdmx:Glossary.Provision agreement.WebHome]] relating to that [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]]. To achieve that, the structure of the [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] has changed in this (% style="color:#e74c3c" %)version(%%) of the standard. Moreover, the Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] [[Artefact>>doc:sdmx:Glossary.Artefact.WebHome]] is introduced to include this feature.
	7	+The scope of the MSD is reduced in SDMX 3.0, by means of simplifying its structure, but also in the way referenced Artefacts are targeted. In fact, the MSD is restricted to play the role of a single container, without targeting any specific Artefact. The possible targets of Metadata Set are specified in the Metadataflows or Metadata Provision Agreements relating to that MSD. To achieve that, the structure of the Metadataflow has changed in this version of the standard. Moreover, the Metadata Provision Agreement Artefact is introduced to include this feature.
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9		-Two more changes, introduced in this (% style="color:#e74c3c" %)version(%%), are the following:
	9	+Two more changes, introduced in this version, are the following:
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11		-* The [[Metadata Set>>doc:sdmx:Glossary.Metadata set.WebHome]] becomes a [[Maintainable Artefact>>doc:sdmx:Glossary.Maintainable artefact.WebHome]] but maintained by a Metadata Provider (another new [[Artefact>>doc:sdmx:Glossary.Artefact.WebHome]] in this (% style="color:#e74c3c" %)version(%%)).
12		-* Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] may also be used in [[Data Structure Definitions>>doc:sdmx:Glossary.Data structure definition.WebHome]], as long as the latter reference the [[Metadata Structure Definition>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] that specify those Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]].
	11	+* The Metadata Set becomes a Maintainable Artefact but maintained by a Metadata Provider (another new Artefact in this version).
	12	+* Metadata Attributes may also be used in Data Structure Definitions, as long as the latter reference the Metadata Structure Definition that specify those Metadata Attributes.
	13	+*1. Identification of the Object(s) to which the Metadata is to be attached
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14		-== 5.2 Identification of the Object(s) to which the Metadata is to be attached ==
	15	+The following example shows the structure and naming of the MSD and related components for creating reference metadata.
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16		-The following example shows the structure and naming of the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] and related [[components>>doc:sdmx:Glossary.Component.WebHome]] for creating reference metadata.
	17	+The schematic structure of an MSD is shown below.
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18		-The schematic structure of an [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] is shown below.
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20	20	[[image:1749590937079-797.jpeg]]
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22	22	**Figure 1: Schematic of the Metadata Structure Definition**
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24		-The [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] contains one Metadata [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] Descriptor comprising the Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] that identify the (% style="color:#e74c3c" %)Concepts(%%) for which metadata may be reported in the [[Metadata Set>>doc:sdmx:Glossary.Metadata set.WebHome]]. The [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] and Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] comprise the specification of the objects to which metadata can be reported in a [[Metadata Set>>doc:sdmx:Glossary.Metadata set.WebHome]] (Metadata Target(s)).
	23	+The MSD contains one Metadata Attribute Descriptor comprising the Metadata Attributes that identify the Concepts for which metadata may be reported in the Metadata Set. The Metadataflow and Metadata Provision Agreement comprise the specification of the objects to which metadata can be reported in a Metadata Set (Metadata Target(s)).
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26		-The high-(% style="color:#e74c3c" %)level(%%) view of the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]], as well as the way the [[Metadataflow>>doc:sdmx:Glossary.Metadataflow.WebHome]] and Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] specify the Targets:
	25	+The high-level view of the MSD, as well as the way the Metadataflow and Metadata Provision Agreement specify the Targets:
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28		-
29	29	**Figure 2: The high-level view of the MSD containing one Metadata Attribute Descriptor**
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31		-
32	32	**Figure 3: Wildcarded Target Objects as specified in a Metadataflow**
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35	35	**Figure 4: Specific Target Objects as specified in a Metadata Provision Agreement**
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37		-Note that the [[SDMX-ML>>doc:sdmx:Glossary.SDMX-ML.WebHome]] schemas have specific XML elements for each identifiable object type because identifying, for instance, a Maintainable Object has different properties from an Identifiable Object which must also include the agencyId, (% style="color:#e74c3c" %)version(%%), and id of the Maintainable Object in which it resides.
	33	+Note that the SDMX-ML schemas have specific XML elements for each identifiable object type because identifying, for instance, a Maintainable Object has different properties from an Identifiable Object which must also include the agencyId, version, and id of the Maintainable Object in which it resides.
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39		-== 5.3 Metadata Structure Definition ==
	35	+1.
	36	+11. Metadata Structure Definition
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41	41	An example is shown below.
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43		-
44	44	**Figure 5: Example MSD showing specification of some Metadata Attributes**
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46		-This example shows the following [[hierarchy>>doc:sdmx:Glossary.Hierarchy.WebHome]] of Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]]:
	42	+This example shows the following hierarchy of Metadata Attributes:
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48		-* (% style="color:#e74c3c" %)Contact(%%) – this is presentational; no metadata is expected to be reported at this level
49		-* (% style="color:#e74c3c" %)Contact(%%) Name
	44	+• Contact – this is presentational; no metadata is expected to be reported at this level
	45	+
	46	+* Contact Name
50	50	* Address – this is also presentational; up to 3 addresses are allowed
51		-** House Number
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53		-== 5.4 Metadata Set ==
	49	+ § House Number
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55		-An example of reporting metadata according to the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] described above, is shown below.
	51	+1.
	52	+11. Metadata Set
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	54	+An example of reporting metadata according to the MSD described above, is shown below.
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58		-**Figure 6: Example Metadata Set**
	56	+==== Figure 6: Example Metadata Set ====
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60	60	This example shows:
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62		-1. The reference to the Metadata [[Provision Agreement>>doc:sdmx:Glossary.Provision agreement.WebHome]] and Metadata Target
63		-1. The reported metadata [[attributes>>doc:sdmx:Glossary.Attribute.WebHome]] (AttributeSet)
64		-1. Reference Metadata in [[Data Structure Definition>>doc:sdmx:Glossary.Data structure definition.WebHome]] and [[Dataset>>doc:sdmx:Glossary.Data set.WebHome]]
	60	+1. The reference to the Metadata Provision Agreement and Metadata Target
	61	+1. The reported metadata attributes (AttributeSet)
	62	+11. Reference Metadata in Data Structure Definition and Dataset
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66		-An important change of [[SDMX>>doc:sdmx:Glossary.Statistical data and metadata exchange.WebHome]] 3.0 is the ability to reference an [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] within a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], in order to report any Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] defined in the former to [[Datasets>>doc:sdmx:Glossary.Data set.WebHome]] of the latter.
	64	+An important change of SDMX 3.0 is the ability to reference an MSD within a DSD, in order to report any Metadata Attributes defined in the former to Datasets of the latter.
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68	68	This is achieved by the following:
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70		-* In a [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], the user may add a reference to one [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]].
71		-* In the [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]] Descriptor of the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], the user may include any Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] defined in the linked [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]].
72		-** For each link to a Metadata [[Attribute>>doc:sdmx:Glossary.Attribute.WebHome]], an [[Attribute Relationship>>doc:sdmx:Glossary.Attribute relationship.WebHome]] may be specified (similarly to that for Data [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]]).
73		-* In any [[Dataset>>doc:sdmx:Glossary.Data set.WebHome]] complying with this [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] may be reported according to the specified [[Attribute Relationship>>doc:sdmx:Glossary.Attribute relationship.WebHome]].
74		-** The [[hierarchy>>doc:sdmx:Glossary.Hierarchy.WebHome]] of the Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] defined in the [[MSD>>doc:sdmx:Glossary.Metadata structure definition.WebHome]] must be respected and they are reported in the same way as in a Metadataset, under the (% style="color:#e74c3c" %)level(%%) they are related within the [[DSD>>doc:sdmx:Glossary.Data structure definition.WebHome]], via their [[Attribute Relationship>>doc:sdmx:Glossary.Attribute relationship.WebHome]].
75		-* In Data (% style="color:#e74c3c" %)Constraints(%%), the user is allowed to restrict values for Metadata [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]], in the same way as Data [[Attributes>>doc:sdmx:Glossary.Attribute.WebHome]] (more on this in section “10 (% style="color:#e74c3c" %)Constraints(%%)”).
	68	+* In a DSD, the user may add a reference to one MSD.
	69	+* In the Attribute Descriptor of the DSD, the user may include any Metadata Attributes defined in the linked MSD. o For each link to a Metadata Attribute, an Attribute Relationship may be specified (similarly to that for Data Attributes).
	70	+* In any Dataset complying with this DSD, Metadata Attributes may be reported according to the specified Attribute Relationship.
	71	+
	72	+o The hierarchy of the Metadata Attributes defined in the MSD must be respected and they are reported in the same way as in a Metadataset, under the level they are related within the DSD, via their Attribute Relationship.
	73	+
	74	+In Data Constraints, the user is allowed to restrict values for Metadata Attributes, in the same way as Data Attributes (more on this in section “10 Constraints”).
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	76	+