====== 5.1 Overview ======
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The [[dido:99_annexes:annex-b-terms-and-definitions:a:archetype|Archetype]] Classification Model identifies the governed business, semantic, and institutional scope of an [[dido:99_annexes:annex-b-terms-and-definitions:a:archetype|Archetype]].

The model gives each [[dido:99_annexes:annex-b-terms-and-definitions:a:archetype|Archetype]] a stable [[dido:99_annexes:annex-b-terms-and-definitions:c:classification_path|Classification Path]] before later documents define logical models, implementation mappings, deployment profiles, or [[dido:99_annexes:annex-b-terms-and-definitions:e:evidence|Evidence]] plans. This [[dido:99_annexes:annex-b-terms-and-definitions:c:classification_path|Classification Path]] helps authors and reviewers understand where an [[dido:99_annexes:annex-b-terms-and-definitions:a:archetype|Archetype]] belongs and which financial [[dido:99_annexes:annex-b-terms-and-definitions:d:domain|Domain]] it addresses.

The classification model uses three primary levels:
  Ecosphere
  └── Ecosystem
     └── Domain

Figure 5.1-1: Archetype classification hierarchy from Ecosphere to Domain

The classification hierarchy moves from broad to specific. An [[dido:99_annexes:annex-b-terms-and-definitions:e:ecosphere|Ecosphere]] identifies a broad area under governance. An [[dido:99_annexes:annex-b-terms-and-definitions:e:ecosystem|Ecosystem]] identifies a major functional area within an [[dido:99_annexes:annex-b-terms-and-definitions:e:ecosphere|Ecosphere]]. A [[dido:99_annexes:annex-b-terms-and-definitions:d:domain|Domain]] identifies a specific business or semantic area within an [[dido:99_annexes:annex-b-terms-and-definitions:e:ecosystem|Ecosystem]].

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