E.g. I dump all kinds of important metadata on title2 like: ourbigbook.com/cirosantilli/list-of-chemical-elements#helium with source: ourbigbook.com/go/source/cirosantilli/helium
These are things that would be really cool to have as a more structured metadat like Wikipedia does via Wikidata, but I'm staying off the structured data for now, though tempted.