Taxonomy Sources

Where do you find taxonomies, thesauri, and ontologies, both free and for purchase? We will list some sources.

Taxonomy Warehouse

Free Web-Directory of Taxonomies
Taxonomy Warehouse is a free service (free to users and free to vocabulary publishers) provided by Synapse, the Knowledge Link Corporation (on the web at for the benefit of the information and knowledge management community.

The Warehouse aims to provide a comprehensive directory of taxonomies, thesauri, classification schemes and other authority files from around the world, plus information about taxonomy references, resources and events.

Web Thesaurus Compendium

Thesauri and classifications categorized according to descriptors extracted from the OECD Macrothesaurus

aerospace industry / AIDS / archaeology / architecture / art / astronomy / chemistry / economic and social development / economics / education / Egypt / environment / folk culture / food preparation / general / geography / government / graphic arts / health / industry / legislation / linguistics / literature / mathematics / medicine / military activity / music / patents / proteins / psychology / research / sign-language / social sciences / technics / transportation / women

Taxonomy ShareSpace

Access, deposit, save, share, and discuss taxonomy resources

The Taxonomy ShareSpace contains information about controlled vocabularies of all types and complexities. You are invited to both browse and contribute. Enjoy term lists for special purpose use, get ideas for building your own vocabulary, perhaps find one that can give you a quicker start.