MusicBrainz

A memory-only corium database compiled to WebAssembly — 20 curated 1997 releases with their artists, labels, media, and tracks. It all runs in this tab; a reload resets it. window.mb is live in the devtools console.

Query — EDN Datalog

Transact — EDN vector of ops, visible to the next query

Result

loading wasm…

Try these in the browser console

mb.q('[:find (count ?t) :where [?t :track/name _]]')
mb.q('[:find ?n :where [?r :release/name "Homogenic"] [?r :release/artists ?a] [?a :artist/name ?n]]')
mb.transact('[{:db/id "x" :artist/gid #uuid "…" :artist/name "…"}]')
mb.stats()