Classification Guides
Curated knowledge for navigating 1,000+ classification systems, 1.2M+ nodes, and 321K+ crosswalk edges.
Getting Started with WorldOfTaxonomy
API quickstart, MCP setup, authentication, and rate limits for the unified classification knowledge graph.
Systems Catalog - All 1,000+ Classification Systems
Complete catalog of classification systems organized by category: industry, trade, occupation, health, education, financial, regulatory, and domain taxonomies.
Crosswalk Map - How Classification Systems Connect
Topology of 321K+ crosswalk edges linking classification systems. Translation paths, match types, and how to navigate between systems.
Industry Classification Guide - Which System to Use
Decision tree for choosing the right industry classification system by country, purpose, and granularity. Compares NAICS, ISIC, NACE, SIC, and regional systems.
Medical and Health Classification Systems Compared
Comparison of ICD-10-CM, ICD-11, MeSH, LOINC, ATC, SNOMED CT, and other health classification systems with use cases and crosswalk paths.
Trade and Product Classification Guide
How HS, CPC, UNSPSC, SITC, and BEC relate. Code structure, crosswalk paths, and which system to use for trade, procurement, and statistical reporting.
Occupation Classification Systems Compared
SOC vs ISCO vs ESCO vs O*NET compared. Structure, granularity, crosswalk paths, and which occupation system to use by country and purpose.
Categories and Sectors - How Systems Are Organized
The 16 categories and domain sectors that organize 1,000+ classification systems in WorldOfTaxonomy. Category definitions, system counts, and navigation.
Domain Taxonomies vs Official Standards
How WorldOfTaxonomy splits classification systems into domain taxonomies (plain-language on-ramps) and official standards (NAICS, ISIC, etc), and how every surface exposes the split.
Data Quality and Provenance
Four-tier provenance framework, source verification, hash auditing, and how to report data quality issues.
System Architecture and Data Flows
Architecture diagrams showing system design, data ingestion pipeline, API request flow, MCP session lifecycle, and the four-channel wiki distribution.