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Last modified by Helena on 2025/09/10 11:19
From version 1.1
edited by Helena
on 2025/05/15 15:48
Change comment: Changed document syntax from [XWiki 2.1] to [xwiki/2.1].
To version 9.1
edited by Helena
on 2025/05/17 00:16
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1 +All [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] in [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] is owned and maintained by a [[maintenance agency>>doc:xwiki:Glossary.Maintenance agency.WebHome]] (Agency identified by agencyID in the schemas). Similarly, all [[reference metadata>>doc:xwiki:Glossary.Reference metadata.WebHome]] (i.e., MetadataSets) is owned and maintained by a metadata provider organisation (MetadataProvider identified by metadataProviderID in the schemas). It is vital to the integrity of the [[structural metadata>>doc:xwiki:Glossary.Structural metadata.WebHome]] that there are no conflicts in agencyID and metadataProviderID. In order to achieve this, [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] adopts the following rules:
2 +
3 +1. Agencies are maintained in an AgencyScheme (which is a sub class of //OrganisationScheme//); Metadata Providers are maintained in a MetadataProviderScheme.
4 +1. The [[maintenance agency>>doc:xwiki:Glossary.Maintenance agency.WebHome]] of the Agency/Metadata Provider Scheme must also be declared in a (different) AgencyScheme.
5 +1. The "top-(% style="color:#2ecc71" %)level(%%) agency is [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] and this [[agency scheme>>doc:xwiki:Glossary.Agency scheme.WebHome]] is maintained by [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]].
6 +1. Agencies registered in the top-(% style="color:#2ecc71" %)level(%%) scheme can themselves maintain a single AgencyScheme and a single MetadataProviderScheme. [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] is an agency in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] AgencyScheme. Agencies in any AgencyScheme can themselves maintain a single AgencyScheme and so on.
7 +1. The AgencyScheme and MetadataProvideScheme cannot be versioned and thus have a fixed (% style="color:#2ecc71" %)version(%%) set to ‘1.0’.
8 +1. There can be only one AgencyScheme maintained by any one Agency. It has a fixed Id of 'AGENCIES'. Similarly, only one MetadataProvideScheme is maintained by one Agency and has a fixed id of 'METADATA_PROVIDERS'.
9 +1. The format of the agency identifier is agencyId.agencyID etc. The top-(% style="color:#2ecc71" %)level(%%) agency in this identification mechanism is the agency registered in the [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] [[agency scheme>>doc:xwiki:Glossary.Agency scheme.WebHome]]. In other words, [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] is not a part of the hierarchical ID structure for agencies. [[SDMX>>doc:xwiki:Glossary.Statistical data and metadata exchange.WebHome]] is, itself, a [[maintenance agency>>doc:xwiki:Glossary.Maintenance agency.WebHome]].
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11 +This supports a hierarchical structure of agencyID.
12 +
13 +An example is shown below.
14 +
15 +[[image:SDMX 3-0-0 SECTION 6 FINAL-1.0_en_12efec58.jpg||height="294" width="373"]]
16 +
17 +**Figure 16: Example of Hierarchic Structure of Agencies**
18 +
19 +Each agency is identified by its full [[hierarchy>>doc:xwiki:Glossary.Hierarchy.WebHome]] excluding SDMX.
20 +
21 +The XML representing this structure is shown below.
22 +
23 +[[image:1747385891229-249.png]]
24 +
25 +**Figure 17: Example Agency Schemes Showing a Hierarchy**
26 +
27 +Examples of Structure definitions that show how Agencies are used, are presented below:
28 +
29 +[[image:1747386478432-897.png]]
30 +
31 +**Figure 18: Example Showing Use of Agency Identifiers**
32 +
33 +Each of these [[maintenance agencies>>doc:xwiki:Glossary.Maintenance agency.WebHome]] has a Codelist with an identical id 'CL_FREQ'.
34 +
35 +However, each is uniquely identified by means of the hierarchic agency structure.
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