This document discusses using semantic technologies and ontologies to enable regulatory compliance through semantic data governance. It introduces the Regulatory Compliance Ontology (RECO) and how a GDPR ontology was created by processing GDPR regulations into semantic models. It describes how TopBraid EDG can integrate these models with its asset governance and lineage ontologies to answer compliance questions by linking enterprise assets to regulatory obligations and requirements. A demo is then presented of how TopBraid EDG can be used to assess situations for GDPR compliance through its knowledge graph.