Dear LilyPond users, I used to post questions on the LilyPond forums few years back when it was possible to post and edit messages directly online (on nabble.com if I recall correctly). But since it was closed, I didn't take the time to subscribe to the mailing list and haven't try that way. I somehow managed to find answers to my questions myself, but today I would need some advice.
I used to be an intense Finale then Sibelius user and I learnt LilyPond back in 2017. Since then, it is my only tool to engrave my scores and I have moved progressively my workflow on Linux. Hence I cannot (and doesn't want) to go back on those proprietary software and it also changed my use of LilyPond (I replaced frescobaldi by vim, I use a lot of separate folders for each projects and program some Makefiles to link everything smoothly, ...). I received some good news recently. A big music publisher (Schott Music Group), is interested in publishing some of my compositions I made for my piano students and it should be released in a near future. I engraved my score with great care, and as I said, using a Makefile and some unix architecture for that particular project. However, as you might guess, they want to engrave it with their own editorial chart and within their music software (I am not sure of which one they are using yet). I proposed to send them my LilyPond files but I have been confirmed yesterday that they cannot process those... They told me an XML file might help them though. I looked if it was possible to export in XML but I read the result was bad and LilyPond wasn't made for that task... So here's my question: what would you suggest I could do to export my scores and help them prepare the album? Thanks for the advices!
