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The Ontology (Semantic Layer)

An ontology is a shared model of a business in objects, links and actions: the nouns a company argues about, how they relate, and what may be done to them. Palantir productized the idea in Foundry and the rest of the industry has since copied it, because grounding an AI system in a customer's own vocabulary is what makes it usable and auditable.

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RELATED CONCEPTS

From Proof-of-Concept to Production AI Agents and Tool Use Tool / Function Calling Data Quality and Validation Retrieval-Augmented Generation (RAG)

LESSONS THAT TEACH THIS

The FDE EngagementGive business definitions an executable home28 min→Foundations of Forward Deployed EngineeringPreserve valid history and the history of what you knew30 min→

PRACTICE THIS IN REAL QUESTIONS

System Design & Production EngineeringYou get a vague prompt like 'design a system to detect fraud.' What do you do in the first ten minutes?→System Design & Production EngineeringDecompose: design a system to detect credit-card fraud.→System Design & Production EngineeringDecompose: design a system to coordinate disaster response for a city.→System Design & Production EngineeringDecompose: merge patient records across a network of hospitals.→AI Security, Privacy & GovernanceThe customer asks: 'Will you train on our data?' Give the precise answer, and explain zero-data-retention.→System Design & Production EngineeringDecompose: design a system to route a fleet of delivery trucks.→