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Changes for page 3 SDMX Base Package

Last modified by Helena on 2025/09/10 11:19
From version 8.1
edited by Helena
on 2025/05/20 00:30
Change comment: There is no comment for this version
To version 7.1
edited by Helena
on 2025/05/20 00:29
Change comment: There is no comment for this version

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164 164  
165 165  ===== {{id name="_Toc370981"/}}3.5.3 Explanation of the Diagram =====
166 166  
167 -==== 3.5.3.1 Narrative ====
167 +**3.5.3.1 Narrative**
168 168  
169 169  The //ItemScheme// is an abstract class which defines a set of //Item// (this class is also abstract). Its main purpose is to define a mechanism which can be used to create taxonomies which can classify other parts of the SDMX Information Model. It inherits from //MaintainableArtefact// which gives it the ability to be annotated, have identity, naming, versioning and be associated with an Agency. An example of a concrete class is a CategoryScheme. The associated Category are //Items//.
170 170  
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178 178  
179 179  The purpose of a partial //ItemScheme// is to support the exchange and dissemination of a subset ItemScheme without the need to maintain multiple //ItemScheme//s which contain the same //Item//s. For instance, when a Codelist is used in a DataStructureDefinition it is sometimes the case that only a sub-set of the Codes in a Codelist are relevant. In this case a partial Codelist can be constructed using the Constraint mechanism explained later in this document.
180 180  
181 -//Item// inherits from //NameableArtefact// which gives it the ability to be annotated and have identity, and therefore has id, uri and urn attributes, a name and a description in the form of an InternationalString. Unlike the parent //ItemScheme//, the //Item// itself is not a //MaintainableArtefact// and therefore cannot have an independent Agency (i.e. it implicitly has the same agency as the //ItemScheme//).
181 +//Item// inherits from //NameableArtefact// which gives it the ability to be annotated and have identity, and therefore has id, uri and urn attributes, a name and a description in the form of an
182 182  
183 +InternationalString. Unlike the parent //ItemScheme//, the //Item// itself is not a //MaintainableArtefact// and therefore cannot have an independent Agency (i.e. it implicitly has the same agency as the //ItemScheme//).
184 +
183 183  The //Item// can be hierarchic and so one //Item// can have child //Item//s. The restriction of the hierarchic association is that a child //Item// can have only parent //Item//.
184 184  
185 185  ==== 3.5.3.2 Definitions ====