Schema.org
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Schema.org is a collaborative, community-maintained vocabulary of types and relationships published as a shared ontology, widely used for structured data markup on the web and as a reusable semantic foundation for domain-specific knowledge modeling.
Role in Agent and Ontology Engineering
Frank Coyle (UC Berkeley) identifies Schema.org as a prime example of an existing ontology resource that practitioners should leverage when building domain ontologies for agentic systems. Rather than constructing term vocabularies and relationship structures from scratch, Coyle advocates reusing established ontologies: "Things like schema.org, which has a whole set of terms and relationships, so you don't have to reinvent the wheel." 2:17:10
This recommendation situates Schema.org alongside peer vocabularies such as FOAF (Friend of a Friend) and Dublin Core as canonical examples of reusable semantic infrastructure. The core argument is one of engineering pragmatism: these vocabularies encode substantial community consensus about how to represent common entities and relationships, reducing the design burden on teams building agent-facing knowledge representations.
Points of Disagreement
No speakers in the available material dispute the utility of Schema.org. The advocacy position is uncontested within the recorded evidence.