Encodes HTML, XML, Markdown, and formatting syntax.

What it is

Symbol.Markup elements encode structural formatting symbols that specify how content should be rendered or organized: HTML tags (`<div>`, `<strong>`), Markdown syntax (** for bold, # for headers), XML structures, and document formatting conventions. They cover the structural container signals that separate document organization from semantic content.

Element 16 of 56 — the Symbol type, as set out in DOI 10.5281/zenodo.19852341.