Hi 8_octaves,
Goldberg Variations is a title. "Bach transcriptions" are transcriptions of which the composer is Bach. [...] dog food
LOL Michael_sayers,

think:
Then, the transcriptions might have been existent, BEFORE he made them??

look:
https://en.wikipedia.org/wiki/Planck_constantThe Planck constant is...
...named after Max Planck, the instigator of quantum theory, who discovered it in 1900.
So, here the connector is the "quantor" => "discovered". Why not it be so for the Verdi transcriptions, too? They were already existent in a ... continuum ? - he only had to DISCOVER them!

Pls note, @michael_sayers: There will be MANY of such examples which won't be sufficiently explained by your "Title => capitalize" - arguments. Even the Goldberg Variations is, diligently spoken, only a "title" for librarians, who have to add them as a "further title-form" on written cards or as references in online cataloging, because the ORIGINAL title wasn't "Goldberg Variations", as you know. And the connector here would be: => "played" or "got the", according to the known anecdote. Because young, blonde, tender Goldberg

PLAYED THEM for the count, when he was in the bed.

....
And "dog food" ? Perhaps it's a film. But if food for dogs is meant, it describes what we all know. ANd not food MADE BY / COMPOSED BY dogs / a dog.
Cordially, 8_octaves!
PS.: I didn't write this posting in a too serious mood. Because, it's difficult for me to stay serious, after having read Michael's funny word-games
