As it stands much of "epub 3.1" dc metadata will actually be closer to what epub2 dc metadata was. The big change will be in non-dc metadata where epub 3.1 would require no old fashioned (self closing) epub2 meta statements. The key things done in the old meta data can easily be done in the new style meta (and without refines) but things like cover image setting will be replaced by manifest properties.
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