We called this the WWW back in the day using Gopher and then web browsers with HTML ;) Tags introduced in HTML 1.0: <TITLE>, <NEXTID>, Base Address, <A>, <ISIN

We called this the WWW back in the day using Gopher and then web browsers with HTML ;) Tags introduced in HTML 1.0: <TITLE>, <NEXTID>, Base Address, <A>, <ISINDEX>, <PLAINTEXT>, <LISTING>, <P>, <H1>..., <ADDRESS>, <HP1>..., <DL> (with <DT> and <DD>), <UL> (with <LI>), <MENU> and <DIR>. Gemtext 1.0(?) markup: headlines (three levels), list items, pre-formatted text, quotes, links. Not sure what you mean with 100% content-centric. No ads? Brutalist Websites?