MusicBrainz RDF Schema

This has already circulated to a few folk, but I thought I’d share it with a wider audience.
Basically I’ve written up a first attempt at an RDF Schema for MusicBrainz. Here’s the schema and here’s the accompanying notes, including some comments on how SongBuddy exports its data as RDF and how this might be improved.
The goal here is to turn this into the official schema for MusicBrainz data (Robert Kaye seems keen to get a schema in place). So comments are very welcome.