RDFS
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RDFS (Resource Description Framework Schema) is a semantic web technology used alongside OWL (Web Ontology Language) to define structured vocabularies and ontologies for knowledge representation in agentic systems.
Role in Ontology Validation
Frank Coyle (UC Berkeley) identifies RDFS as a core component of the Ontology Validator infrastructure used to enforce guardrails in agentic systems. Specifically, he frames RDFS and OWL together as "support technologies" that underpin the guardrail mechanisms agents rely on for structured, constrained reasoning: "for the guardrails, I'm referring to these concepts these support technologies with RDFS and owl".
Coyle groups RDFS with OWL under the broader category of technologies that enable ontologies to function as formal, machine-interpretable structures: "Things that we call the things like RDFS, which is a technology, and OWL".
Significance for Agentic Systems
In Coyle's framing, RDFS is not merely a data modeling tool but a foundational piece of infrastructure for building safe and semantically coherent agentic pipelines. By providing schema-level definitions of classes, properties, and their relationships, RDFS enables the kind of formal ontological reasoning that Coyle argues agentic systems require to operate reliably within defined boundaries.