Sometimes an emendation is made on metrical grounds -- for example, there's a poem by Leonardo Bruni imitating Catullus in which one line reads "quos tanta inguina haud habere nosti," emended by an anonymous reader to "non." That's in your lexical category, but the main motive is metrical. And sometimes an emendation is to the colometry of a text. This is nowhere near as common in Latin as in Greek but I could imagine making this kind of emendation in the cantica of Plautus (though I don't know anything about the MS of Plautus or who established the line divisions of the cantica as we now read them). If a verse inscription is laid out on the stone without regard for the verse lines, and an editor wants to print the text in the customary verse shape, that, too, is an emendation of a sort.
So I think it might be useful to add "meter" as a category for emendations. It might also be useful to have a standard way to encode a metrical analysis, though it may be enough just to write it out (now that we have unicode metrical symbols, which wasn't true 15 years ago when I was first thinking about this).
Sometimes an emendation is made on metrical grounds -- for example, there's a poem by Leonardo Bruni imitating Catullus in which one line reads "quos tanta inguina haud habere nosti," emended by an anonymous reader to "non." That's in your lexical category, but the main motive is metrical. And sometimes an emendation is to the colometry of a text. This is nowhere near as common in Latin as in Greek but I could imagine making this kind of emendation in the cantica of Plautus (though I don't know anything about the MS of Plautus or who established the line divisions of the cantica as we now read them). If a verse inscription is laid out on the stone without regard for the verse lines, and an editor wants to print the text in the customary verse shape, that, too, is an emendation of a sort.
So I think it might be useful to add "meter" as a category for emendations. It might also be useful to have a standard way to encode a metrical analysis, though it may be enough just to write it out (now that we have unicode metrical symbols, which wasn't true 15 years ago when I was first thinking about this).