Yeah, Ctrl+I import doesn’t seem to preserve everything, not sure what’s up with that. But you can edit the files normally just fine—though you’ll have to conve

Yeah, Ctrl+I import doesn’t seem to preserve everything, not sure what’s up with that. But you can edit the files normally just fine—though you’ll have to convert the polylines to paths to edit the points. Inkscape is mangling the filter regions a bit when you round-trip it, and I’m decidedly unimpressed with that (which has seemed to me to be worse in 1.1 than it was in 1.0, perhaps because it’s more proactive about both recalculating and constraining), but other than that everything’s unaltered, and you can edit the file just fine—though as I mentioned before, edits on an element that contains <animate> children (which here specifically means the filters) may destroy those children. (polyline and polygon are weird elements, serving no useful purpose, as they can be trivially converted to paths: <polyline points="…"/> → <path d="M…"/>, and <polygon points="…"/> → <path d="M…Z"/>.)