Post #1695842

Doing a little infrastructure refresh for llll.ro got me wondering: are there vocabularies, or other markup conventions, for marking up digitized books as to convey #semantics not covered by HTML? (As CSS hooks for now, but possibly doing more interesting things later). Recently bumped into #EPUB Structural Semantics Vocab, but curious if there are any other initiatives in this space (describing book parts) https://www.w3.org/TR/epub-ssv-11/