Changes for page 8 Hierarchy

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4	4
5	5	== 8.1 Scope ==
6	6
7		-The [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] described in the section on structural definitions supports a simple [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of Codes and restricts any [[child>>doc:IMElements.child.WebHome]] [[Code>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Code.WebHome]] to having just one [[parent>>doc:IMElements.parent.WebHome]] [[Code>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Code.WebHome]]. Whilst this [[structure>>doc:IMElements.structure.WebHome]] is useful for supporting the needs of the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] and the [[MetadataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.MetadataStructureDefinition.WebHome]], it may not be sufficient for supporting the more complex associations between codes that are often found in coding schemes such as a [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] scheme. Often, the [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] used in a [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]] is derived from a more complex coding scheme. Access to such a coding scheme can aid applications, such as OLAP applications or data visualisation systems, to give more views of the data than would be possible with the simple [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] used in the [[DataStructureDefinition>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.Structure.DataStructureDefinition.WebHome]]. A [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] may be linked to an IndentifiableArtefact, in order to assist.
	7	+The [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] described in the section on structural definitions supports a simple [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] and restricts any child [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] to having just one parent [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]]. Whilst this structure is useful for supporting the needs of the DataStructureDefinition and the MetadataStructureDefinition, it may not be sufficient for supporting the more complex associations between [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] that are often found in coding schemes such as a [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] scheme. Often, the [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] used in a DataStructureDefinition is derived from a more complex coding scheme. Access to such a coding scheme can aid applications, such as OLAP applications or data visualisation systems, to give more views of the data than would be possible with the simple [[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] used in the DataStructureDefinition. A [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] may be linked to an IndentifiableArtefact, in order to assist.
8	8
9		-Note that a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is not necessarily a balanced tree. A balanced tree is where levels are pre-defined and fixed, (i.e. a level always has the same set of codes, and any code has a fixed [[parent>>doc:IMElements.parent.WebHome]] and [[child>>doc:IMElements.child.WebHome]] relationship to other codes). A [[statistical classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] is an example of a balanced tree, and the support for a balanced [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is a subset, and special case, of [[hierarchies>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	9	+Note that a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is not necessarily a balanced tree. A balanced tree is where [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] are pre-defined and fixed, (i.e. a [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] always has the same set of [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]], and any [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] has a fixed parent and child relationship to other [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]]). A [[statistical classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] is an example of a balanced tree, and the support for a balanced [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is a subset, and special case, of [[hierarchies>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
10	10
11	11	The principal features of the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are:
12	12
13		-1. A [[child>>doc:IMElements.child.WebHome]] code can have more than one [[parent>>doc:IMElements.parent.WebHome]].
14		-1. There can be more than one code that has no [[parent>>doc:IMElements.parent.WebHome]] (i.e. more than one “root node”).
15		-1. The levels in a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can be explicitly defined or they can be implicit: i.e. they exist only as [[parent>>doc:IMElements.parent.WebHome]]/[[child>>doc:IMElements.child.WebHome]] relationships in the coding [[structure>>doc:IMElements.structure.WebHome]].
	13	+1. A child [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] can have more than one parent.
	14	+1. There can be more than one [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] that has no parent (i.e. more than one “root node”).
	15	+1. The [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can be explicitly defined or they can be implicit: i.e. they exist only as parent/child relationships in the coding structure.
16	16	1. [[Hierarchies>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] may be associated to the structures they refer to, via the HierarchyAssociation.
17	17
18	18	== 8.2 Inheritance ==
...	...	@@ -27,9 +27,9 @@
27	27
28	28	==== 8.2.2.1 Narrative ====
29	29
30		-The [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] and //HierarchyAssociation// inherit from //[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]// and thus have identification, naming, versioning and a [[maintenance agency>>doc:sdmx:Glossary 2\.1.Maintenance agency.WebHome]]. The Level is a //[[NameableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.WebHome]]// and therefore has an Id, multi-lingual [[name>>doc:IMElements.name.WebHome]] and multi-lingual [[description>>doc:IMElements.description.WebHome]]. A //HierachicalCode// is an //[[IdentifiableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.WebHome]]//.
	30	+The [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] and //HierarchyAssociation// inherit from //MaintainableArtefact// and thus have identification, naming, versioning and a [[maintenance agency>>doc:sdmx:Glossary 2\.1.Maintenance agency.WebHome]]. The [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] is a //NameableArtefact// and therefore has an Id, multi-lingual name and multi-lingual description. A //HierachicalCode// is an //IdentifiableArtefact//.
31	31
32		-It is important to understand that the Codes participating in a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are not themselves contained in the list – they are referenced from the list and are maintained in one or more [[Codelists>>doc:sdmx:Glossary 2\.1.Code list.WebHome]]. This is explained in the narrative of the relationship class diagram below.
	32	+It is important to understand that the [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] participating in a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are not themselves contained in the list – they are referenced from the list and are maintained in one or more [[Codelists>>doc:sdmx:Glossary 2\.1.Code list.WebHome]]. This is explained in the narrative of the relationship class diagram below.
33	33
34	34	==== 8.2.2.2 Definitions ====
35	35
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49	49
50	50	The basic principles of the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are:
51	51
52		-1. The [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is a specification of the [[structure>>doc:IMElements.structure.WebHome]] of the Codes.
53		-1. The Codes in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are not themselves a part of the [[artefact>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]], rather they are [[references>>doc:IMElements.references.WebHome]] to Codes in one or more external [[Codelists>>doc:sdmx:Glossary 2\.1.Code list.WebHome]].
54		-1. The [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of Codes is specified in HierarchicalCode. This [[references>>doc:IMElements.references.WebHome]] the [[Code>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Code.WebHome]] and its immediate [[child>>doc:IMElements.child.WebHome]] HierarchicalCodes.
	52	+1. The [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is a specification of the structure of the [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]].
	53	+1. The [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] are not themselves a part of the [[artefact>>doc:sdmx:Glossary 2\.1.Artefact.WebHome]], rather they are references to [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] in one or more external [[Codelists>>doc:sdmx:Glossary 2\.1.Code list.WebHome]].
	54	+1. The [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] is specified in HierarchicalCode. This references the [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] and its immediate child HierarchicalCodes.
55	55
56		-A [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can have formal levels (hasFormalLevels="true"). However, even if hasFormalLevels="false" the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can still have one or more Levels associated in order to document information about the HierarchicalCodes.
	56	+A [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can have formal [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] (hasFormalLevels="true"). However, even if hasFormalLevels="false" the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] can still have one or more [[Levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] associated in order to document information about the HierarchicalCodes.
57	57
58		-If hasFormalLevels="false" the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is “[[value>>doc:IMElements.value.WebHome]] based” comprising a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of codes with no formal Levels. If hasFormalLevels="true" then the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is “level based” where each Level is a formal Level in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]], such as those present in [[statistical classifications>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]]. In a “level based” [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] each HierarchicalCode is linked to the Level in which it resides. It is expected that all HierarchicalCodes at the same hierarchic level defined by the +[[parent>>doc:IMElements.parent.WebHome]]/+[[child>>doc:IMElements.child.WebHome]] association will be linked to the same Level. Note that the +level association need only be specified if the HierarchicalCode is at a different hierarchical level (implied by the HierarchicalCode [[parent>>doc:IMElements.parent.WebHome]]/[[child>>doc:IMElements.child.WebHome]] association) than the actual Level in the level [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] (implied by the Level [[parent>>doc:IMElements.parent.WebHome]]/[[child>>doc:IMElements.child.WebHome]] association).
	58	+If hasFormalLevels="false" the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is “value based” comprising a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] of [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] with no formal [[Levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]]. If hasFormalLevels="true" then the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] is “[[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] based” where each [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] is a formal [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]], such as those present in [[statistical classifications>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]]. In a “[[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] based” [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] each HierarchicalCode is linked to the [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in which it resides. It is expected that all HierarchicalCodes at the same hierarchic [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] defined by the +parent/+child association will be linked to the same [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]]. Note that the +[[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] association need only be specified if the HierarchicalCode is at a different hierarchical [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] (implied by the HierarchicalCode parent/child association) than the actual [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in the [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] (implied by the [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] parent/child association).
59	59
60		-[Note that organisations wishing to be compliant with accepted models for [[statistical classifications>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] should ensure that the Id is the number associated with the Level, where Levels are numbered consecutively starting with level 1 at the highest Level].
	60	+[Note that organisations wishing to be compliant with accepted models for [[statistical classifications>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] should ensure that the Id is the number associated with the [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]], where [[Levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] are numbered consecutively starting with [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] 1 at the highest [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]]].
61	61
62		-The Level may have CodingFormat information defined (e.g. coding [[type>>doc:IMElements.type.WebHome]] at that level).
	62	+The [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] may have CodingFormat information defined (e.g. coding type at that [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]]).
63	63
64		-A HierarchyAssociation links an [[IdentifiableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.WebHome]] (+linkedObject), that needs a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]], with the latter (+linkedHierarchy). The association is performed in a certain context (+contextObject), e.g. a [[Dimension>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.Component.DimensionComponent.Dimension.WebHome]] in the context of a [[Dataflow>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.StructureUsage.Dataflow.WebHome]].
	64	+A HierarchyAssociation links an IdentifiableArtefact (+linkedObject), that needs a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]], with the latter (+linkedHierarchy). The association is performed in a certain context (+contextObject), e.g. a [[Dimension>>doc:sdmx:Glossary 2\.1.Dimension.WebHome]] in the context of a [[Dataflow>>doc:sdmx:Glossary 2\.1.Dataflow.WebHome]].
65	65
66	66	==== 8.3.2.2 Definitions ====
67	67
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69	69	|**Class**|**Feature**|(% style="width:564px" %)**Description**
70	70	|[[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]]|(((
71	71	Inherits from:
72		-//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
73		-)))|(% style="width:564px" %)A [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] structure arranged in levels of detail from the broadest to the most detailed level.
	72	+//MaintainableArtefact//
	73	+)))|(% style="width:564px" %)A [[classification>>doc:sdmx:Glossary 2\.1.Statistical Classification.WebHome]] structure arranged in [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] of detail from the broadest to the most detailed [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]].
74	74	| |hasFormalLevels|(% style="width:564px" %)(((
75		-If “true”, this indicates a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] where the structure is arranged in levels of detail from the broadest to the most detailed level.
	75	+If “true”, this indicates a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] where the structure is arranged in [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] of detail from the broadest to the most detailed [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]].
76	76
77		-If “false”, this indicates a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] structure where the items in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] have no formal level structure.
	77	+If “false”, this indicates a [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] structure where the items in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] have no formal [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] structure.
78	78	)))
79		-| |+codes|(% style="width:564px" %)Association to the top-level [[Hierarchical Codes>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
80		-| |+level|(% style="width:564px" %)Association to the top Level in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
81		-|Level|(((
	79	+| |+codes|(% style="width:564px" %)Association to the top-[[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] [[Hierarchical Codes>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	80	+| |+level|(% style="width:564px" %)Association to the top [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	81	+|[[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]]|(((
82	82	Inherits from
83		-//[[NameableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.WebHome]]//
	83	+//NameableArtefact//
84	84	)))|(% style="width:564px" %)(((
85		-In a “level based” [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] this describes a group of Codes which are characterised by homogeneous coding, and where the parent of each Code in the group is at the same higher level of the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
86		-In a “value based’ [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] this describes information about the [[Hierarchical Codes>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] at the specified nesting level.
	85	+In a “[[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] based” [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] this describes a group of [[Codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] which are characterised by homogeneous coding, and where the parent of each [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] in the group is at the same higher [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] of the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	86	+In a “value based’ [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] this describes information about the [[Hierarchical Codes>>doc:sdmx:Glossary 2\.1.Hierarchical code.WebHome]] at the specified nesting [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]].
87	87	)))
88	88	| |+codeFormat|(% style="width:564px" %)Association to the [[Coding Format>>doc:sdmx:Glossary 2\.1.Coding format.WebHome]].
89		-| |+[[child>>doc:IMElements.child.WebHome]]|(% style="width:564px" %)Association to a child Level of Level.
90		-|CodingFormat| |(% style="width:564px" %)Specifies format information for the codes at this level in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] such as whether the codes at the level are alphabetic, numeric or alphanumeric and the code length.
91		-|HierarchicalCode| |(% style="width:564px" %)A hierarchic structure of code references.
92		-| |[[validFrom>>doc:IMElements.validFrom.WebHome]]|(% style="width:564px" %)Date from which the construct is valid
93		-| |[[validTo>>doc:IMElements.validTo.WebHome]]|(% style="width:564px" %)Date from which construct is superseded.
94		-| |+code|(% style="width:564px" %)Association to the Code that is used at the specific point in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
95		-| |+[[child>>doc:IMElements.child.WebHome]]|(% style="width:564px" %)Association to a child Code in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
96		-| |+level|(% style="width:564px" %)Association to a Level where levels have been defined for the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
97		-|[[Code>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.Item.Code.WebHome]]| |(% style="width:564px" %)The Code to be used at this point in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
98		-| |/[[items>>doc:IMElements.items.WebHome]]|(% style="width:564px" %)Association to the [[Code list>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] containing the Code.
99		-|[[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]]| |(% style="width:564px" %)The [[Code list>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] containing the Code.
	89	+| |+child|(% style="width:564px" %)Association to a child [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] of [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]].
	90	+|CodingFormat| |(% style="width:564px" %)Specifies format information for the [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] at this [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]] such as whether the [[codes>>doc:sdmx:Glossary 2\.1.Code.WebHome]] at the [[level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] are alphabetic, numeric or alphanumeric and the [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] length.
	91	+|HierarchicalCode| |(% style="width:564px" %)A hierarchic structure of [[code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] references.
	92	+| |validFrom|(% style="width:564px" %)Date from which the construct is valid
	93	+| |validTo|(% style="width:564px" %)Date from which construct is superseded.
	94	+| |+code|(% style="width:564px" %)Association to the [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] that is used at the specific point in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	95	+| |+child|(% style="width:564px" %)Association to a child [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	96	+| |+level|(% style="width:564px" %)Association to a [[Level>>doc:sdmx:Glossary 2\.1.Level.WebHome]] where [[levels>>doc:sdmx:Glossary 2\.1.Level.WebHome]] have been defined for the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	97	+|[[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]]| |(% style="width:564px" %)The [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]] to be used at this point in the [[hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].
	98	+| |/items|(% style="width:564px" %)Association to the [[Code list>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] containing the [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]].
	99	+|[[Codelist>>doc:sdmx:Glossary 2\.1.Code list.WebHome]]| |(% style="width:564px" %)The [[Code list>>doc:sdmx:Glossary 2\.1.Code list.WebHome]] containing the [[Code>>doc:sdmx:Glossary 2\.1.Code.WebHome]].
100	100	|HierarchyAssociation|(((
101	101	Inherits from:
102		-//[[MaintainableArtefact>>doc:IMElements.AnnotableArtefact.IdentifiableArtefact.NameableArtefact.VersionableArtefact.MaintainableArtefact.WebHome]]//
	102	+//MaintainableArtefact//
103	103	)))|(% style="width:564px" %)An association between an [[Identifiable Artefact>>doc:sdmx:Glossary 2\.1.Identifiable artefact.WebHome]] and a [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]], within a specific context.
104	104	| |+contextObject|(% style="width:564px" %)The context within which the association is performed.
105	105	| |+linkedObject|(% style="width:564px" %)Associates the [[Identifiable Artefact>>doc:sdmx:Glossary 2\.1.Identifiable artefact.WebHome]] that needs the [[Hierarchy>>doc:sdmx:Glossary 2\.1.Hierarchy.WebHome]].