Second-Order Classification

The structural backbone of Aevum Encyclopedia. First-order domains establish broad knowledge territories; second-order categories provide precision navigation, enabling researchers to isolate disciplines, subfields, and specialized taxonomies with algorithmic accuracy.

Explore Taxonomy → Open Classification Explorer

Domain Hierarchies

Click any first-order domain to reveal its second-order subcategories, article counts, and cross-referenced nodes.

🔬 Natural Sciences

Physics
84,200 articles
Chemistry
62,150 articles
Biology
112,400 articles
Earth Sciences
38,900 articles
Astronomy
29,300 articles
Ecology
24,700 articles

📜 Humanities

Philosophy
76,800 articles
History
142,500 articles
Linguistics
41,200 articles
Literature
98,400 articles
Religious Studies
33,600 articles
Classical Studies
27,100 articles

📊 Social Sciences

Psychology
89,300 articles
Sociology
54,200 articles
Economics
67,800 articles
Political Science
45,900 articles
Anthropology
31,400 articles
Geography
28,600 articles

⚙️ Applied Sciences

Engineering
73,500 articles
Computer Science
91,200 articles
Medicine
124,800 articles
Architecture
22,400 articles
Agriculture
19,800 articles
Pharmacy
26,300 articles

🔢 Formal Sciences

Mathematics
58,900 articles
Logic
14,200 articles
Statistics
32,600 articles
Systems Theory
11,800 articles
Information Science
24,500 articles

🌐 Interdisciplinary

Cognitive Science
21,300 articles
Digital Humanities
15,700 articles
Environmental Studies
34,100 articles
Neuroscience
47,800 articles
Data Science
52,400 articles

Classification Methodology

How Aevum structures, validates, and evolves its knowledge taxonomy.

Algorithmic Mapping

Our NLP pipeline ingests new publications, identifies emerging concepts, and proposes second-order classifications based on citation networks, semantic clustering, and cross-domain references.

Expert Curation

Domain specialists review AI-proposed nodes. They adjust boundaries, merge overlapping categories, and ensure terminological consistency across 140+ language variants.

Dynamic Refinement

Classification is living. User navigation patterns, correction requests, and academic consensus shifts trigger automated re-evaluation of second-order boundaries quarterly.

Classification Explorer

Query the taxonomy, filter by discipline, and trace knowledge pathways.

All Domains Natural Sciences Humanities Applied Interdisciplinary
Classification Node Parent Domain Articles Status
Computational Linguistics Computer Science → AI & NLP → Computational Linguistics Applied Sciences 14,230 Stable
Quantum Information Theory Physics → Quantum Mechanics → Quantum Information Natural Sciences 8,940 Active
Behavioral Economics Social Sciences → Economics → Behavioral Economics Social Sciences 11,560 Stable
Digital Epistemology Interdisciplinary → Philosophy + Data Science Interdisciplinary 3,120 Emerging
Synthetic Biology Natural Sciences → Biology → Synthetic Biology Natural Sciences 9,870 Active