Simon Willison’s Weblog

What are the differences between a vocabulary, a taxonomy, a thesaurus, an ontology, and a meta-model? IA definitions++

Posted 23rd January 2004 at 8:36 pm

Recent articles

First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
My answers to the questions I posed about porting open source code with LLMs - 11th January 2026
Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time - 9th January 2026

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