Semantic HTML
HTML that describes content meaning, not just appearance. Foundation of agent-readable pages.
Why it matters
Semantic HTML tells AI agents and screen readers what each part of the page means.
In practice
Every page uses proper heading hierarchy, semantic elements (main, nav, article, footer), and ARIA labels.
Related terms
Dual-Layer Architecture
Page structure where every page serves both humans (visual UI) and agents (structured data, APIs).
JSON-LD
A structured data format for web pages. Tells search engines and agents what a page contains.
Schema.org
Structured data vocabulary used by search engines and agents to understand web content.
Agent-Compatible Digital Experience
A website or application designed to serve both human visitors and AI agents simultaneously.