https://docs.asciidoctor.org/asciidoc/latest/document/header/
Document Header | Asciidoctor Docs
A documentation page for AsciiDoc.
document headerasciidoctor docs
https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/head
head HTML document metadata (header) element - HTML | MDN
html documentheadmetadataelementmdn