The catalog lists 2142 authorized editions in Opera, with instrumentation, parts, and publisher catalog numbers.
![Attila [Critical Edition] — Giuseppe Verdi](https://cdn.score.ui888.net/api/v1/media/7069301b-10d0-4020-ac64-e9c199e74a19/content?v=card)
![Dark Sisters [version for two pianos and percussion] — Nico Muhly](https://cdn.score.ui888.net/api/v1/media/4ace7fb2-5244-4391-9ed8-ff32aab881b9/content?v=card)
![Guillaume Tell [Critical Edition] — Gioachino Rossini](https://cdn.score.ui888.net/api/v1/media/404069b2-0252-428a-a9af-c4f39bc8a6fa/content?v=card)
