If I understand this page (https://idpf.github.io/epub-vocabs/structure/#h_asides) correctly, the epub:type="sidebar" attribute is deprecated. I don't know how to interpret "Replaced by: aside", however. Does that mean epub:type="aside"? The link on "aside" goes to a description of the <aside> element, so should sidebars just be <aside>s without any epub:type?
Thanks for your help.