In many EU countries author has inalienable rights: right to be recognized as author and name to be appropriately stated if author desires it, right to permit or prohibit modifications of the work, right to revoke the work, but doing so requires author to compensate for the losses revocation causes.

I am not sure how non transferability of these rights work in combination with authors right to permit those things. What exactly happens if author permits modifications of work? Does it only apply to specific modification and each modification needs to be permitted separately? If not it would seem contradicting with this right not being transferable.