creates a virtual layer that allows users to query and retrieve data from various underlying sources as if they were part of a unified graph. This virtual graph is not materialized; rather, it provides a conceptual view that facilitates seamless data access across heterogeneous systems.The diversity in the available tools and paradigms to RDFize data and create semantic knowledge graphs is a favorable advantage to avoid vendor lock-in and democratize access to data interoperability through open source tools and standards.