Controlled Vocabulary
- http://www.controlledvocabulary.com/
- Describes how controlled vocabularies are useful in describing images and information for classifying content in electronic databases. Links to sample hierarchies and controlled vocabularies. Also features links to related resources.
DELTA: Description Language for Taxonomy
- http://www.delta-intkey.com/
- A flexible format for encoding taxonomic descriptions for computer processing, intended for biology but with broad applications. It can be used to produce natural-language descriptions, conventional or interactive keys, classifications, and information-retrieval systems.
Taxonomy Warehouse
- http://www.taxonomywarehouse.com
- Directory of taxonomies, thesauri, classification schemes, and other authority files, plus information on how to license the taxonomies. Features search, browse and alert service.