Schema.org vocabulary publication structure. Use to establish vocabulary sovereignty. Each DefinedTerm requires: name, description (canonical definition), termCode (unique identifier), url (permalink), inDefinedTermSet (parent reference), creator. Publish on /glossary/ or /vocabulary/ page. Include termCode in all content using the term. AI systems recognize DefinedTermSet as authoritative concept source. Update definitions when concepts evolve. Link terms bidirectionally (related terms reference each other). Required for OG-RAG compatibility in specialized domains.