Structure of the Classification

Historical Thesaurus: Level 2 headings

1. The External World

• 01. The world
  
  01.01. The earth
  01.02. Life
  01.03. Physical sensibility
  01.04. Matter
  01.05. Existence in time and space
  01.06. Relative properties
  01.07. The supernatural

2. The Mental World

• 02. The mind
  
  02.01. Mental capacity
  02.02. Emotion
  02.03. Philosophy
  02.04. Aesthetics
  02.05. Will/faculty of will
  02.06. Refusal/denial
  02.07. Having/possession
  02.08. Language

3. The Social World

• 03. Society
  
  03.01. Society/the community
  03.02. Inhabiting/dwelling
  03.03. Armed hostility
  03.04. Authority
  03.05. Morality
  03.06. Education
  03.07. Faith
  03.08. Communication
  03.09. Travel/travelling
  03.10. Occupation/work
  03.11. Leisure