Considere os três extratos, respectivamente, da Tabela Principal (000-599), da Tabela 1 e da Tabela 2 da 22ª edição da Classificação Decimal de Dewey (CDD).

Extrato 1 – Schedules (000-599)

[...]
342 Constitutional and administrative law
.001-.009 Standard subdivisions; law, regulations, cases, procedure, courts
.02 Basic instruments of government
.03 Revision and amendment of basic instruments of government
.04 Structure, powers, functions of government
.05 Legislative branch of government
.06 Executive branch of government
.07 Election law
.08 Jurisdiction over persons
.09 Local government
.1 Socioeconomic regions
.2 Regional intergovernmental organizations
.3-.9 Specific jurisdictions and areas
[…]

Extrato 2 – Table 1. Standard Subdivision

-093-099 Treatment by specific continents, countries, localities; extraterrestrial worlds

History and description by place, by specific instance of the subject

And to base number -09 notation 3-9 from Table 2

[…]

Extrato 3 - Table 2. Geographic Areas, Historical Periods,

Persons
[...]
- 8 South America
- 81 Brazil
- 82 Argentina
- 83 Chile
- 84 Bolivia
- 85 Peru
- 86 Colombia and Ecuador
- 87 Venezuela
- 88 Guiana
- 89 Paraguay and Uruguay
[...]

Qual a classificação da fonte de informação sobre Direito Constitucional Brasileiro?