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Research draft

hierarchy

vr.tr.hierarchy · XCT.QLT

Let an agent identify and represent hierarchies, explain their structure and levels, apply them in organisation and classification, and analyse their strengths and limits.

Thing Registry Cross-cutting context

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent identify and represent hierarchies, explain their structure and levels, apply them in organisation and classification, and analyse their strengths and limits.

An arrangement of items in which each is ranked above, below or at the same level as others, forming levels or a tree, such as organisational hierarchies, classification hierarchies, court and social ranks, grading systems such as kyu and dan in martial arts, and formal hierarchies in mathematics and computing such as the formal language hierarchy.

What it is for: Organising items by rank or containment.

It can be represent a hierarchy as a tree or levels; explain levels and relationships; apply hierarchies in classification and organisation; analyse limits and alternatives.

Distinguishing features

Ranked or nested

Levels

Tree-like

Widely used

What it looks like

Not physical; trees, charts and rank lists.

How it is recognised

Ranked levels

Tree structure

A network without ranking is not a hierarchy

Related models

is a kind of - category

structure

is a kind of - category

conceptual system

is used in - organisation

classification scheme

is related to - social ranks

aristocrat

In practice

Families and kinds

organisational hierarchies

classification and taxonomic hierarchies

social and court ranks

grading hierarchies such as kyu and dan

formal hierarchies in mathematics and computing

Standards and regulation

Standards for hierarchical classification such as ISO 25964

Organisational governance rules

Failure modes and hazards

Forcing non-hierarchical relations into trees

Rigid hierarchies hindering communication

Ambiguous levels

Also called

hierarchical classificationclassification of scienceskyū in karatecourt rankformal language hierarchykyūdan/kyū rankcourt rank in Korearank of the Ryukyu Kingdomdan/kyū in iaidodan/kyu rank in Gomulti-level governanceorder of precedencebiological organisationorder of precedence in the European UnionAlbanian order of precedenceYeomanry order of precedenceorder of precedence in Italyorder of precedence in Switzerlandorder of precedence in Franceseniority in familyBulgarian order of precedenceSingapore Order of PrecedenceGerman order of precedenceOrder of precedence in England and WalesIndian order of precedenceDanish order of precedenceFinnish order of precedenceHong Kong order of precedenceOrder of precedenceNew Zealand order of precedenceOrder of precedence in Northern IrelandOrder of precedence in RomaniaOrder of precedence in ScotlandOrder of precedence in the Polish–Lithuanian CommonwealthPolish order of precedenceSpanish order of precedenceSri Lankan order of precedenceSwedish order of precedenceorders of precedence in the United Kingdom

+31

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.hierarchy

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Represent Modelling a hierarchy.

Levels and trees.

Structure

Levels and nodes.

Structure

Structure.

  1. What are the levels and relationships in this hierarchy, and can it be drawn as a tree? definition
  2. Are there items with multiple parents? boundary

Rank

Ranking items.

Rank

Ranking.

  1. How are items ranked within the hierarchy, and what does a level signify? definition
  2. How is a new item placed? action
Kinds Types of hierarchy.

Examples.

Social

Ranks and organisations.

Social

Social hierarchies.

  1. How does this organisational, court or social hierarchy work, according to its rules? provenance
  2. How are ranks such as kyu and dan awarded in martial arts? provenance

Formal

Formal hierarchies.

Formal

Formal hierarchies.

  1. What is the Chomsky hierarchy of formal languages or another formal hierarchy? definition
  2. How are hierarchies used in classification of sciences? provenance
Apply Using hierarchies.

Design.

Design

Designing a hierarchy.

Design

Design.

  1. How should a hierarchy be designed for this classification or organisation? action
  2. How deep should it be? boundary

Navigate

Navigating hierarchies.

Navigate

Navigation.

  1. How can users navigate or search a hierarchical structure effectively? action
  2. When are facets better than trees? boundary
Critique Limits and alternatives.

Hierarchies have costs.

Limits

When hierarchies fail.

Limits

Limits.

  1. What are the limits of hierarchies in organisations and knowledge, according to research? provenance
  2. Which alternatives such as networks or flat structures exist? provenance

Teach

Teaching.

Teach

Teaching.

  1. How can hierarchical thinking be taught with examples? action
  2. Which misconceptions arise? provenance

What the second pass must settle

  • Should organisational hierarchy be a separate entry?
  • How should formal hierarchies be linked?
  • How should grading systems be linked?
Draft as JSON