Changes for page 3 SDMX Base Package

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1		-xwiki:XWiki.helena
	1	+xwiki:XWiki.arturkryazhev

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18	18
19	19	[[image:1749246130522-547.jpeg]]
20	20
21		-[[image:image36.png]]
22		-
23	23	**Figure 10: SDMX Identification, Maintenance and Versioning**
24	24
25	25	=== 3.2.2 Explanation of the Diagram ===
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32	32
33	33	The //IdentifiableArtefact// is an abstract class that comprises the basic [[attributes>>doc:Glossary.Attribute.WebHome]] needed for identification. Concrete classes based on //IdentifiableArtefact// all inherit the ability to be uniquely identified.
34	34
35		-The (% style="background-color:#e74c3c" %)//NamableArtefact//(%%) is an abstract class that inherits from //IdentifiableArtefact //and in addition the +[[description>>doc:IMElements.description.WebHome]] and +[[name>>doc:IMElements.name.WebHome]] roles support multilingual descriptions and names for all objects based on //NameableArtefact//. The InternationalString supports the [[representation>>doc:Glossary.Representation.WebHome]] of a [[description>>doc:IMElements.description.WebHome]] in multiple locales ([[locale>>doc:IMElements.locale.WebHome]] is similar to language but includes geographic variations such as Canadian French, US English etc.). The //LocalisedString// supports the [[representation>>doc:Glossary.Representation.WebHome]] of a [[description>>doc:IMElements.description.WebHome]] in one [[locale>>doc:IMElements.locale.WebHome]].
	33	+The //NamableArtefact// is an abstract class that inherits from //IdentifiableArtefact //and in addition the +description and +name roles support multilingual descriptions and names for all objects based on //NameableArtefact//. The InternationalString supports the [[representation>>doc:Glossary.Representation.WebHome]] of a description in multiple locales (locale is similar to language but includes geographic variations such as Canadian French, US English etc.). The //LocalisedString// supports the [[representation>>doc:Glossary.Representation.WebHome]] of a description in one locale.
36	36
37	37	//VersionableArtefact// is an abstract class which inherits from //NameableArtefact// and adds versioning ability to all classes derived from it, as explained in the [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] versioning rules in [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] Standards Section 6 “Technical Notes”, paragraph “4.3 Versioning”.
38	38
39		-//MaintainableArtefact// further adds the ability for derived classes to be maintained via its association to an //[[Organisation>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Organisation.WebHome]]//, and adds locational information (i.e., from where the object can be retrieved).
	37	+//MaintainableArtefact// further adds the ability for derived classes to be maintained via its association to an //Organisation//, and adds locational information (i.e., from where the object can be retrieved).
40	40
41	41	The inheritance chain from //AnnotableArtefact// through to //MaintainableArtefact// allows [[SDMX>>doc:Glossary.Statistical data and metadata exchange.WebHome]] classes to inherit the features they need, from simple [[annotation>>doc:Glossary.Annotation.WebHome]], through identity, naming, to versioning and maintenance.
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102	102
103	103	[[image:1749246130530-261.jpeg]]
104	104
105		-[[image:3_11.png]]
106		-
107	107	**Figure 11: Basic Inheritance from the Base Structures**
108	108
109	109	=== 3.3.2 Explanation of the Diagram ===
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118	118
119	119	[[image:1749246130536-128.jpeg]]
120	120
121		-[[image:3_12.png]]
122		-
123	123	**Figure 12: Class Diagram of Basic Data Types**
124	124
125	125	=== 3.4.2 Explanation of the Diagram ===
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151	151
152	152	The [[Item Scheme>>doc:Glossary.Item scheme.WebHome]] is a basic architectural pattern that allows the creation of list schemes for use in simple taxonomies, for example.
153	153
154		-The //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// is the basis for [[CategoryScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.CategoryScheme.WebHome]], Codelist, [[ConceptScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ConceptScheme.WebHome]], [[ReportingTaxonomy>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ReportingTaxonomy.WebHome]], //[[OrganisationScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.OrganisationScheme.WebHome]]//, TransformationScheme, CustomTypeScheme, NamePersonalisationScheme, RulesetScheme, VtlMappingScheme and UserDefinedOperatorScheme.
	148	+The //ItemScheme// is the basis for CategoryScheme, Codelist, ConceptScheme, ReportingTaxonomy, //OrganisationScheme//, TransformationScheme, CustomTypeScheme, NamePersonalisationScheme, RulesetScheme, VtlMappingScheme and UserDefinedOperatorScheme.
155	155
156	156	=== 3.5.2 Class Diagram ===
157	157
158	158	[[image:1749246130543-644.jpeg]]
159	159
160		-[[image:3_13.png]]
161		-
162	162	**Figure 13 The Item Scheme pattern**
163	163
164	164	=== 3.5.3 Explanation of the Diagram ===
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165	165
166	166	==== 3.5.3.1 Narrative ====
167	167
168		-The //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// is an abstract class which defines a set of //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// (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>>doc:Glossary.SDMX Information Model.WebHome]]. It is derived from //[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]// which gives it the ability to be annotated, have identity, naming, versioning and be associated with an [[Agency>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Organisation.Agency.WebHome]]. An example of a concrete class is a [[ConceptScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ConceptScheme.WebHome]]. The associated [[Concepts>>doc:Glossary.Concept.WebHome]] are //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s.
	160	+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>>doc:Glossary.SDMX Information Model.WebHome]]. It is derived 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 ConceptScheme. The associated (% style="color:#e74c3c" %)[[Concepts>>doc:Glossary.Concept.WebHome]](%%) are //Item//s.
169	169
170		-In an exchange environment an //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// is allowed to contain a sub-set of the //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s in the maintained //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//. If such an [[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]] is disseminated with a sub-set of the //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s then the fact that this is a sub-set is denoted by setting the isPartial [[attribute>>doc:Glossary.Attribute.WebHome]] to "true".
	162	+In an exchange environment an //ItemScheme// is allowed to contain a sub-set of the //Item//s in the maintained //ItemScheme//. If such an ItemScheme is disseminated with a sub-set of the //Item//s then the fact that this is a sub-set is denoted by setting the isPartial [[attribute>>doc:Glossary.Attribute.WebHome]] to "true".
171	171
172		-A “partial” //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// cannot be maintained independently in its partial form i.e., it cannot contain //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s that are not present in the full //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// and the content of any one //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]] //(e.g., names and descriptions) cannot deviate from the content in the full //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//. Furthermore, the [[id>>doc:IMElements.id.WebHome]] of the //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// where isPartial is set to "true" is the same as the [[id>>doc:IMElements.id.WebHome]] of the full //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// (agencyId, [[id>>doc:IMElements.id.WebHome]], [[version>>doc:Glossary.Version.WebHome]]). This is important as this is the [[id>>doc:IMElements.id.WebHome]] that that is referenced in other structures (e.g., a [[Codelist>>doc:Glossary.Code list.WebHome]] referenced in a [[DSD>>doc:Glossary.Data structure definition.WebHome]]) and this [[id>>doc:IMElements.id.WebHome]] is always the same, regardless of whether the disseminated //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// is the full //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// or a partial //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//.
	164	+A “partial” //ItemScheme// cannot be maintained independently in its partial form i.e., it cannot contain //Item//s that are not present in the full //ItemScheme// and the content of any one //Item //(e.g., names and descriptions) cannot deviate from the content in the full //ItemScheme//. Furthermore, the id of the //ItemScheme// where isPartial is set to "true" is the same as the id of the full //ItemScheme// (agencyId, id, (% style="color:#e74c3c" %)[[version>>doc:Glossary.Version.WebHome]](%%)). This is important as this is the id that that is referenced in other structures (e.g., a [[Codelist>>doc:Glossary.Code list.WebHome]] referenced in a [[DSD>>doc:Glossary.Data structure definition.WebHome]]) and this id is always the same, regardless of whether the disseminated //ItemScheme// is the full //ItemScheme// or a partial //ItemScheme//.
173	173
174		-The purpose of a partial //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// is to support the exchange and dissemination of a subset //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// without the need to maintain multiple //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//s which contain the same //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s. For instance, when a [[Codelist>>doc:Glossary.Code list.WebHome]] is used in a [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] it is sometimes the case that only a sub-set of the [[Codes>>doc:Glossary.Code.WebHome]] in a [[Codelist>>doc:Glossary.Code list.WebHome]] are relevant. In this case a partial [[Codelist>>doc:Glossary.Code list.WebHome]] can be constructed using the [[Constraint>>doc:Glossary.Constraint.WebHome]] mechanism explained later in this document.
	166	+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>>doc:Glossary.Code list.WebHome]] is used in a DataStructureDefinition it is sometimes the case that only a sub-set of the [[Codes>>doc:Glossary.Code.WebHome]] in a [[Codelist>>doc:Glossary.Code list.WebHome]] are relevant. In this case a partial [[Codelist>>doc:Glossary.Code list.WebHome]] can be constructed using the (% style="color:#e74c3c" %)[[Constraint>>doc:Glossary.Constraint.WebHome]](%%) mechanism explained later in this document.
175	175
176		-//[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// inherits from //[[NameableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.WebHome]]// which gives it the ability to be annotated and have identity, and therefore has [[id>>doc:IMElements.id.WebHome]], [[uri>>doc:IMElements.uri.WebHome]] and [[urn>>doc:IMElements.urn.WebHome]] [[attributes>>doc:Glossary.Attribute.WebHome]], a [[name>>doc:IMElements.name.WebHome]] and a [[description>>doc:IMElements.description.WebHome]] in the form of an [[InternationalString>>doc:IMElements.InternationalString.WebHome]]. Unlike the [[parent>>doc:IMElements.parent.WebHome]] //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//, the //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// itself is not a //[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]// and therefore cannot have an independent [[Agency>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Organisation.Agency.WebHome]] (i.e., it implicitly has the same agencyId as the //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//).
	168	+//Item// inherits from //NameableArtefact// which gives it the ability to be annotated and have identity, and therefore has id, uri and urn [[attributes>>doc:Glossary.Attribute.WebHome]], 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 agencyId as the //ItemScheme//).
177	177
178		-The //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// can be hierarchic and so one //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// can have [[child>>doc:IMElements.child.WebHome]] //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//s. The restriction of the hierarchic association is that a [[child>>doc:IMElements.child.WebHome]] //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]// can have only [[parent>>doc:IMElements.parent.WebHome]] //[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//.
	170	+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//.
179	179
180	180	==== 3.5.3.2 Definitions ====
181	181
182	182	(% style="width:989.835px" %)
183	183	|**Class**|(% style="width:297px" %)**Feature**|(% style="width:583px" %)**Description**
184		-|//[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]//|(% style="width:297px" %)(((
	176	+|//ItemScheme//|(% style="width:297px" %)(((
185	185	Inherits from:
186		-//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
	178	+//MaintainableArtefact//
187	187	Direct sub classes are:
188		-[[CategoryScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.CategoryScheme.WebHome]]
189		-[[ConceptScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ConceptScheme.WebHome]]
	180	+CategoryScheme
	181	+ConceptScheme
190	190	Codelist
191		-[[ReportingTaxonomy>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ReportingTaxonomy.WebHome]]
192		-//[[OrganisationScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.OrganisationScheme.WebHome]]//
	183	+ReportingTaxonomy
	184	+//OrganisationScheme//
193	193	TransformationScheme
194		-CustomTypeScheme NamePersonalisationScheme
	186	+CustomTypeScheme NamePersonalisationSc heme
195	195	RulesetScheme
196	196	VtlMappingScheme
197		-UserDefinedOperatorScheme
	189	+UserDefinedOperatorSc heme
198	198	)))|(% style="width:583px" %)The descriptive information for an arrangement or division of objects into groups based on characteristics, which the objects have in common.
199	199	| |(% style="width:297px" %)isPartial|(% style="width:583px" %)Denotes whether the [[Item Scheme>>doc:Glossary.Item scheme.WebHome]] contains a subset of the full set of Items in the maintained scheme.
200	200	| |(% style="width:297px" %)/items|(% style="width:583px" %)Association to the Items in the scheme.
201		-|//[[Item>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.WebHome]]//|(% style="width:297px" %)(((
	193	+|//Item//|(% style="width:297px" %)(((
202	202	Inherits from:
203		-//[[NameableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.WebHome]]//
	195	+//NameableArtefact//
204	204	Direct sub classes are
205		-[[Category>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Category.WebHome]]
206		-[[Concept>>doc:Glossary.Concept.WebHome]]
	197	+Category
	198	+(% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%)
207	207	[[Code>>doc:Glossary.Code.WebHome]]
208		-[[ReportingCategory>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.ReportingCategory.WebHome]]
209		-//[[Organisation>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Organisation.WebHome]]//
	200	+ReportingCategory //Organisation//
210	210	Transformation
211	211	CustomType
212	212	NamePersonalisation
213	213	Ruleset
214	214	VtlMapping
215		-UserDefinedOperator
	206	+UserDefinedOperator// //hierarchy
216	216	)))|(% style="width:583px" %)(((
217	217	The Item is an item of content in an [[Item Scheme>>doc:Glossary.Item scheme.WebHome]]. This may be a node in a taxonomy or ontology, a [[code>>doc:Glossary.Code.WebHome]] in a [[code list>>doc:Glossary.Code list.WebHome]] etc. Node that at the conceptual level the Organisation is not hierarchic.
	209	+This allows an Item optionally to have one or more child Items
218	218	)))
219		-| |(% style="width:297px" %)hierarchy|(% style="width:583px" %)This allows an Item optionally to have one or more child Items
220	220
221	221	== 3.6 The Structure Pattern ==
222	222
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239	239
240	240	==== 3.6.3.1 Narrative ====
241	241
242		-The //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// is an abstract class which contains a set of one or more //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]//(s) (this class is also abstract). An example of a concrete //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// is [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]].
	233	+The //Structure// is an abstract class which contains a set of one or more //ComponentList//(s) (this class is also abstract). An example of a concrete //Structure// is DataStructureDefinition.
243	243
244		-The //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]// is a list of one or more //[[Component>>doc:Glossary.Component.WebHome]]//(s//)//. The //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]// has several concrete descriptor classes based on it: [[DimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.DimensionDescriptor.WebHome]], [[GroupDimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.GroupDimensionDescriptor.WebHome]], [[MeasureDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MeasureDescriptor.WebHome]], and [[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]] of the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] and [[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]] of the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]].
	235	+The //ComponentList// is a list of one or more //[[Component>>doc:Glossary.Component.WebHome]]//(s//)//. The //ComponentList// has several concrete descriptor classes based on it: DimensionDescriptor, GroupDimensionDescriptor, MeasureDescriptor, and AttributeDescriptor of the DataStructureDefinition and MetadataAttributeDescriptor of the MetadataStructureDefinition.
245	245
246		-The //[[Component>>doc:Glossary.Component.WebHome]]// is contained in a //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]//. The [[type>>doc:IMElements.type.WebHome]] of //[[Component>>doc:Glossary.Component.WebHome]]// in a //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]// is dependent on the concrete class of the [[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]] as follows:
	237	+The //[[Component>>doc:Glossary.Component.WebHome]]// is contained in a //ComponentList//. The type of //[[Component>>doc:Glossary.Component.WebHome]]// in a //ComponentList// is dependent on the concrete class of the ComponentList as follows:
247	247
248		-[[DimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.DimensionDescriptor.WebHome]]: [[Dimension>>doc:Glossary.Dimension.WebHome]], [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]]
249		-[[GroupDimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.GroupDimensionDescriptor.WebHome]]: [[Dimension>>doc:Glossary.Dimension.WebHome]], [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]]
250		-[[MeasureDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MeasureDescriptor.WebHome]]: [[Measure>>doc:Glossary.Measure.WebHome]]
251		-[[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]]: [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]], MetadataAttributeRef
252		-[[MetadataAttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MetadataAttributeDescriptor.WebHome]]: [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]]
	239	+DimensionDescriptor: [[Dimension>>doc:Glossary.Dimension.WebHome]], TimeDimension
	240	+GroupDimensionDescriptor: [[Dimension>>doc:Glossary.Dimension.WebHome]], TimeDimension
	241	+MeasureDescriptor: [[Measure>>doc:Glossary.Measure.WebHome]]
	242	+AttributeDescriptor: DataAttribute, MetadataAttributeRef
	243	+MetadataAttributeDescriptor: MetadataAttribute
253	253
254		-Each //[[Component>>doc:Glossary.Component.WebHome]]// takes its semantic (and possibly also its [[representation>>doc:Glossary.Representation.WebHome]]) from a [[Concept>>doc:Glossary.Concept.WebHome]] in a [[ConceptScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.ConceptScheme.WebHome]]. This is represented by the conceptIdentity association to [[Concept>>doc:Glossary.Concept.WebHome]].
	245	+Each //[[Component>>doc:Glossary.Component.WebHome]]// takes its semantic (and possibly also its [[representation>>doc:Glossary.Representation.WebHome]]) from a (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) in a ConceptScheme. This is represented by the conceptIdentity association to (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%).
255	255
256		-The //[[Component>>doc:Glossary.Component.WebHome]]// may also have a localRepresentation. This allows a concrete class, such as [[Dimension>>doc:Glossary.Dimension.WebHome]], to specify its [[representation>>doc:Glossary.Representation.WebHome]] which is local to the //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// in which it is contained (for [[Dimension>>doc:Glossary.Dimension.WebHome]] this will be [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]]), and thus overrides any coreRepresentation specified for the [[Concept>>doc:Glossary.Concept.WebHome]].
	247	+The //[[Component>>doc:Glossary.Component.WebHome]]// may also have a localRepresentation. This allows a concrete class, such as [[Dimension>>doc:Glossary.Dimension.WebHome]], to specify its [[representation>>doc:Glossary.Representation.WebHome]] which is local to the //Structure// in which it is contained (for [[Dimension>>doc:Glossary.Dimension.WebHome]] this will be DataStructureDefinition), and thus overrides any coreRepresentation specified for the (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%).
257	257
258		-The [[Representation>>doc:Glossary.Representation.WebHome]] can be [[enumerated>>doc:IMElements.enumerated.WebHome]] or [[non-enumerated>>doc:IMElements.nonEnumerated.WebHome]]. The valid content of an [[enumerated>>doc:IMElements.enumerated.WebHome]] [[representation>>doc:Glossary.Representation.WebHome]] is specified either in an //[[ItemScheme>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.WebHome]]// which can be one of [[Codelist>>doc:Glossary.Code list.WebHome]], [[ValueList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.EnumeratedList.ValueList.WebHome]] or //[[GeoCodelist>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.ItemScheme.Codelist.GeoCodelist.WebHome]]//. The valid content of a [[non-enumerated>>doc:IMElements.nonEnumerated.WebHome]] [[representation>>doc:Glossary.Representation.WebHome]] is specified as one or more Facet(s) (for example, these may specify minimum and maximum values). For any [[Attribute>>doc:Glossary.Attribute.WebHome]] this is achieved by one of more
	249	+The [[Representation>>doc:Glossary.Representation.WebHome]] can be enumerated or non-enumerated. The valid content of an enumerated [[representation>>doc:Glossary.Representation.WebHome]] is specified either in an //ItemScheme// which can be one of [[Codelist>>doc:Glossary.Code list.WebHome]], ValueList or //GeoCodelist//. The valid content of a non-enumerated [[representation>>doc:Glossary.Representation.WebHome]] is specified as one or more Facet(s) (for example, these may specify minimum and maximum values). For any [[Attribute>>doc:Glossary.Attribute.WebHome]] this is achieved by one of more
259	259
260	260	ExtendedFacet(s), which allow the additional [[representation>>doc:Glossary.Representation.WebHome]] of XHTML.
261	261
262		-The types of [[representation>>doc:Glossary.Representation.WebHome]] that are valid for specific [[components>>doc:Glossary.Component.WebHome]] is expressed in the model as a [[constraint>>doc:Glossary.Constraint.WebHome]] on the association:
	253	+The types of [[representation>>doc:Glossary.Representation.WebHome]] that are valid for specific [[components>>doc:Glossary.Component.WebHome]] is expressed in the model as a (% style="color:#e74c3c" %)[[constraint>>doc:Glossary.Constraint.WebHome]](%%) on the association:
263	263
264		-* The [[Dimension>>doc:Glossary.Dimension.WebHome]], [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]], [[Measure>>doc:Glossary.Measure.WebHome]], [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] may be [[enumerated>>doc:IMElements.enumerated.WebHome]] and, if so, use an //[[EnumeratedList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.EnumeratedList.WebHome]]//.
265		-* The [[Dimension>>doc:Glossary.Dimension.WebHome]] and [[Measure>>doc:Glossary.Measure.WebHome]] may be [[non-enumerated>>doc:IMElements.nonEnumerated.WebHome]] and, if so, use one or more Facet(s), note that the FacetValueType applicable to the [[TimeDimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.TimeDimension.WebHome]] is restricted to those that represent time.
266		-* The [[MetadataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.MetadataAttribute.WebHome]] and [[DataAttribute>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.DataAttribute.WebHome]] may be [[non-enumerated>>doc:IMElements.nonEnumerated.WebHome]] and, if so, use one or more ExtendedFacet(s).
	255	+* The [[Dimension>>doc:Glossary.Dimension.WebHome]], DataAttribute, [[Measure>>doc:Glossary.Measure.WebHome]], MetadataAttribute may be enumerated and, if so, use an //EnumeratedList//.
	256	+* The [[Dimension>>doc:Glossary.Dimension.WebHome]] and [[Measure>>doc:Glossary.Measure.WebHome]] may be non-enumerated and, if so, use one or more Facet(s), note that the FacetValueType applicable to the TimeDimension is restricted to those that represent time.
	257	+* The MetadataAttribute and DataAttribute may be non-enumerated and, if so, use one or more ExtendedFacet(s).
267	267
268		-The //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]// may be used by one or more //[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]//(s). An example of this, in terms of concrete classes, is that a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] (sub class of //[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]//) may use a particular [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] (sub class of //[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]//), and similar constructs apply for the [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] (link to [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]]).
	259	+The //Structure// may be used by one or more //StructureUsage//(s). An example of this, in terms of concrete classes, is that a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] (sub class of //StructureUsage//) may use a particular DataStructureDefinition (sub class of //Structure//), and similar constructs apply for the [[Metadataflow>>doc:Glossary.Metadataflow.WebHome]] (link to MetadataStructureDefinition).
269	269
270	270	==== 3.6.3.2 Definitions ====
271	271
272		-(% style="width:1368.29px" %)
273		-|**Class**|**Feature**|(% style="width:897px" %)**Description**
274		-|[[StructureUsage>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.WebHome]]|(((
	263	+|**Class**|**Feature**|**Description**
	264	+|StructureUsage|(((
275	275	Inherits from:
276		-//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
	266	+//MaintainableArtefact//
277	277	Sub classes are:
278	278	[[Dataflow>>doc:Glossary.Dataflow.WebHome]]
279	279	[[Metadataflow>>doc:Glossary.Metadataflow.WebHome]]
280		-)))|(% style="width:897px" %)An [[artefact>>doc:Glossary.Artefact.WebHome]] whose [[components>>doc:Glossary.Component.WebHome]] are described by a Structure. In concrete terms (sub-classes) an example would be a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] which is linked to a given structure – in this case the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
281		-| |[[structure>>doc:IMElements.structure.WebHome]]|(% style="width:897px" %)An association to a Structure specifying the structure of the [[artefact>>doc:Glossary.Artefact.WebHome]].
282		-|[[Structure>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.WebHome]]|(((
	270	+)))|An [[artefact>>doc:Glossary.Artefact.WebHome]] whose [[components>>doc:Glossary.Component.WebHome]] are described by a Structure. In concrete terms (sub-classes) an example would be a [[Dataflow>>doc:Glossary.Dataflow.WebHome]] which is linked to a given structure – in this case the [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
	271	+| |structure|An association to a Structure specifying the structure of the [[artefact>>doc:Glossary.Artefact.WebHome]].
	272	+|Structure|(((
283	283	Inherits from:
284		-//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
	274	+//MaintainableArtefact//
285	285	Sub classes are:
286		-[[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] MetadataStructureDefinition
287		-)))|(% style="width:897px" %)Abstract specification of a list of lists to define a complex tabular structure. A concrete example of this would be statistical [[concepts>>doc:Glossary.Concept.WebHome]], [[code lists>>doc:Glossary.Code list.WebHome]], and their organisation in a data or [[metadata structure definition>>doc:Glossary.Metadata structure definition.WebHome]], defined by a centre institution, usually for the exchange of statistical information with its partners.
288		-| |[[grouping>>doc:IMElements.grouping.WebHome]]|(% style="width:897px" %)A composite association to one or more [[component>>doc:Glossary.Component.WebHome]] lists.
289		-|//[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]//|(((
	276	+DataStructureDefinition MetadataStructureDefinit ion
	277	+)))|Abstract specification of a list of lists to define a complex tabular structure. A concrete example of this would be statistical (% style="color:#e74c3c" %)[[concepts>>doc:Glossary.Concept.WebHome]](%%), [[code lists>>doc:Glossary.Code list.WebHome]], and their organisation in a data or [[metadata structure definition>>doc:Glossary.Metadata structure definition.WebHome]], defined by a centre institution, usually for the exchange of statistical information with its partners.
	278	+| |grouping|A composite association to one or more [[component>>doc:Glossary.Component.WebHome]] lists.
	279	+|//ComponentList//|(((
290	290	Inherits from:
291		-//[[IdentifiableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.WebHome]]//
	281	+//IdentifiableArtefact//
292	292	Sub classes are:
293		-[[DimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.DimensionDescriptor.WebHome]]
294		-[[GroupDimensionDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.GroupDimensionDescriptor.WebHome]]
295		-[[MeasureDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.MeasureDescriptor.WebHome]]
296		-[[AttributeDescriptor>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.AttributeDescriptor.WebHome]] MetadataAttributeDescriptor
297		-)))|(% style="width:897px" %)An abstract definition of a list of [[components>>doc:Glossary.Component.WebHome]]. A concrete example is a [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor, which defines the list of [[Dimensions>>doc:Glossary.Dimension.WebHome]] in a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
298		-| |[[components>>doc:Glossary.Component.WebHome]]|(% style="width:897px" %)An aggregate association to one or more [[components>>doc:Glossary.Component.WebHome]] which make up the list.
	283	+DimensionDescriptor
	284	+GroupDimensionDescriptor
	285	+MeasureDescriptor
	286	+AttributeDescriptor MetadataAttributeDescrip tor
	287	+)))|An abstract definition of a list of [[components>>doc:Glossary.Component.WebHome]]. A concrete example is a [[Dimension>>doc:Glossary.Dimension.WebHome]] Descriptor, which defines the list of [[Dimensions>>doc:Glossary.Dimension.WebHome]] in a [[Data Structure Definition>>doc:Glossary.Data structure definition.WebHome]].
	288	+| |[[components>>doc:Glossary.Component.WebHome]]|An aggregate association to one or more [[components>>doc:Glossary.Component.WebHome]] which make up the list.
299	299	|//[[Component>>doc:Glossary.Component.WebHome]]//|(((
300	300	Inherits from:
301		-//[[IdentifiableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.WebHome]]//
	291	+//IdentifiableArtefact//
302	302	Sub classes are:
303	303	[[Measure>>doc:Glossary.Measure.WebHome]]
304		-//[[AttributeComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.AttributeComponent.WebHome]]
305		-[[DimensionComponent>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.WebHome]]//
306		-)))|(% style="width:897px" %)A [[Component>>doc:Glossary.Component.WebHome]] is an abstract super class used to define qualitative and quantitative data and metadata items that belong to a [[Component>>doc:Glossary.Component.WebHome]] List and hence a Structure. [[Component>>doc:Glossary.Component.WebHome]] is refined through its sub-classes.
307		-| |conceptIdentity|(% style="width:897px" %)Association to a [[Concept>>doc:Glossary.Concept.WebHome]] in a [[Concept Scheme>>doc:Glossary.Concept scheme.WebHome]] that identifies and defines the semantic of the [[Component>>doc:Glossary.Component.WebHome]].
308		-| |localRepresentation|(% style="width:897px" %)(((
309		-Association to the [[Representation>>doc:Glossary.Representation.WebHome]] of the [[Component>>doc:Glossary.Component.WebHome]] if this is different from the coreRepresentation of the [[Concept>>doc:Glossary.Concept.WebHome]], which the [[Component>>doc:Glossary.Component.WebHome]] uses (ConceptUsage).
	294	+//AttributeComponent
	295	+DimensionComponent//
	296	+)))|A [[Component>>doc:Glossary.Component.WebHome]] is an abstract super class used to define qualitative and quantitative data and metadata items that belong to a [[Component>>doc:Glossary.Component.WebHome]] List and hence a Structure. [[Component>>doc:Glossary.Component.WebHome]] is refined through its sub-classes.
	297	+| |conceptIdentity|Association to a (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%) in a [[Concept Scheme>>doc:Glossary.Concept scheme.WebHome]] that identifies and defines the semantic of the [[Component>>doc:Glossary.Component.WebHome]].
	298	+| |localRepresentation|(((
	299	+Association to the [[Representation>>doc:Glossary.Representation.WebHome]] of the [[Component>>doc:Glossary.Component.WebHome]] if this is different from the coreRepresentation of the
	300	+
	301	+(% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]](%%), which the [[Component>>doc:Glossary.Component.WebHome]] uses (ConceptUsage).
310	310	)))
311		-|[[Representation>>doc:Glossary.Representation.WebHome]]| |(% style="width:897px" %)The allowable value or format for [[Component>>doc:Glossary.Component.WebHome]] or [[Concept>>doc:Glossary.Concept.WebHome]]
312		-| |+[[enumerated>>doc:IMElements.enumerated.WebHome]]|(% style="width:897px" %)Association to an enumerated list that contains the allowable content for the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]]. The type of enumerated list that is allowed for any concrete [[Component>>doc:Glossary.Component.WebHome]] is shown in the [[constraints>>doc:Glossary.Constraint.WebHome]] on the association.
313		-| |+nonEnumerated|(% style="width:897px" %)Association to a set of [[Facets>>doc:Glossary.Facet.WebHome]] that define the allowable format for the content of the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]].
314		-|[[Facet>>doc:Glossary.Facet.WebHome]]| |(% style="width:897px" %)Defines the format for the content of the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]].
315		-| |facetType|(% style="width:897px" %)A specific content type, which is constrained by the [[Facet>>doc:Glossary.Facet.WebHome]] Type enumeration.
316		-| |facetValueType|(% style="width:897px" %)The format of the value of a [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]]. This is constrained by the [[Facet>>doc:Glossary.Facet.WebHome]] Value Type enumeration.
317		-| |+itemSchemeFacet|(% style="width:897px" %)Defines the format of the identifiers in an [[Item Scheme>>doc:Glossary.Item scheme.WebHome]] used by a [[Component>>doc:Glossary.Component.WebHome]]. Typically, this would define the number of characters (length) of the identifier.
318		-|[[ExtendedFacet>>doc:IMElements.Facet.ExtendedFacet.WebHome]]| |(% style="width:897px" %)This has the same function as [[Facet>>doc:Glossary.Facet.WebHome]] but allows additionally an XHTML [[representation>>doc:Glossary.Representation.WebHome]]. This is constrained for use with a Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] and a Data [[Attribute>>doc:Glossary.Attribute.WebHome]].
	303	+|[[Representation>>doc:Glossary.Representation.WebHome]]| |The allowable value or format for [[Component>>doc:Glossary.Component.WebHome]] or (% style="color:#e74c3c" %)[[Concept>>doc:Glossary.Concept.WebHome]]
	304	+| |+enumerated|Association to an enumerated list that contains the allowable content for the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]]. The type of enumerated list that is allowed for any concrete [[Component>>doc:Glossary.Component.WebHome]] is shown in the (% style="color:#e74c3c" %)[[constraints>>doc:Glossary.Constraint.WebHome]](%%) on the association.
	305	+| |+nonEnumerated|Association to a set of [[Facets>>doc:Glossary.Facet.WebHome]] that define the allowable format for the content of the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]].
	306	+|[[Facet>>doc:Glossary.Facet.WebHome]]| |Defines the format for the content of the [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]].
	307	+| |facetType|A specific content type, which is constrained by the [[Facet>>doc:Glossary.Facet.WebHome]] Type enumeration.
	308	+| |facetValueType|The format of the value of a [[Component>>doc:Glossary.Component.WebHome]] when reported in a data or [[metadata set>>doc:Glossary.Metadata set.WebHome]]. This is constrained by the [[Facet>>doc:Glossary.Facet.WebHome]] Value Type enumeration.
	309	+| |+itemSchemeFacet|Defines the format of the identifiers in an [[Item Scheme>>doc:Glossary.Item scheme.WebHome]] used by a [[Component>>doc:Glossary.Component.WebHome]]. Typically, this would define the number of characters (length) of the identifier.
	310	+|ExtendedFacet| |This has the same function as [[Facet>>doc:Glossary.Facet.WebHome]] but allows additionally an XHTML [[representation>>doc:Glossary.Representation.WebHome]]. This is constrained for use with a Metadata [[Attribute>>doc:Glossary.Attribute.WebHome]] and a Data [[Attribute>>doc:Glossary.Attribute.WebHome]].
319	319
320		-The specification of the content and use of the sub classes to //[[ComponentList>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.ComponentList.WebHome]]// and //[[Component>>doc:Glossary.Component.WebHome]]// can be found in the section in which they are used ([[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] and [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]]). Moreover, the FacetType SentinelValues is explained in the datastructure [[representation>>doc:Glossary.Representation.WebHome]] diagram (see 5.3.2.2), since it only concerns DataStructureDefinitions.
	312	+The specification of the content and use of the sub classes to //ComponentList// and //[[Component>>doc:Glossary.Component.WebHome]]// can be found in the section in which they are used (DataStructureDefinition and MetadataStructureDefinition). Moreover, the FacetType SentinelValues is explained in the datastructure [[representation>>doc:Glossary.Representation.WebHome]] diagram (see 5.3.2.2), since it only concerns DataStructureDefinitions.
321	321
322	322	==== 3.6.3.3 Representation Constructs ====
323	323

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