August 26, 2026 
5 PM CET / 11 AM ET / 8 AM PT (60 min) Semantics, ontology, knowledge graph, context: these terms come up in every AI-data conversation and they're rarely used the same way twice. That confusion has a real cost: teams build the wrong thing or build three things that don't talk to each other.
This opening session of the Context Governance series does two jobs. First, it draws the clean distinctions — what each layer actually is, what it's for and how they stack into something an AI agent can reason over. Second, it makes the case for why any of this needs governing: the moment an agent starts making decisions on top of these layers, the meaning it consumes has to be trusted, owned and maintained — not just modeled once and forgotten.
During this webinar you'll learn:
- The real difference between a semantic layer, an ontology and a knowledge graph — and when you need which
- What it actually means to govern context, versus simply building a model of it
- Why concepts from library science and the semantic web suddenly became urgent for AI agents
Featuring Sanjeev Mohan (Principal, SanjMo & former Gartner Research VP) and Jessica Talisman (Owner & Founder, Contextually LLC), moderated by Chirag Dhull (CMO, Collibra).
Register now to secure your spot. If you're unable to attend the webinar live, register anyway and we'll send you the recording.
