I think that sounds a bit like asking for interoperation between Latex and Microsoft Word: technically kind of possible, but only in limited unidirectional ways that won't get much use in practice.
Exporting a limited/ pared down version (say just the "content" minus formatting) to a tidy and comprehensible (human readable/ editable) .ly file would be a great feature. Probably even feasible for a casual dev to write such an importer/exporter as a plugin. Might look into it.
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The dream of course, would be to see some inter-operation capabilities between Lilypond and Musescore.
I think that sounds a bit like asking for interoperation between Latex and Microsoft Word: technically kind of possible, but only in limited unidirectional ways that won't get much use in practice.
Exporting a limited/ pared down version (say just the "content" minus formatting) to a tidy and comprehensible (human readable/ editable) .ly file would be a great feature. Probably even feasible for a casual dev to write such an importer/exporter as a plugin. Might look into it.