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

Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson - 26th November 2025
Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025

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