This document discusses Kyligence's unified semantic layer, which defines advanced semantic models on data lakes and synchronizes them across BI tools. It provides a single source of truth, increases efficiency, and improves governance. The semantic layer supports complex analysis scenarios and seamlessly integrates with tools like Power BI, Excel, and Tableau. A demo shows how the AI-augmented engine powers data management and supports multiple query interfaces. Kyligence has replaced large systems like Teradata for many enterprises and supports millisecond responses for 100,000 concurrent users.