A major challenge of the nascent Semantic Web is the multitude of data formats, languages, schemas and ontologies. "A General Framework for Evolution and Reactivity in the Semantic Web" was designed for bridging the gap torn apart by the heterogeneity. This framework is based on Event-Condition-Action (ECA) rules. With the release of version 10g Oracle has enhanced its database software by adding a Rules Manager package that allows the user to define and manage ECA rules. In this book, the features of the Oracle Rules Manager are examined and it is analysed how and to what extent the Rules Manager can function as a domain node in the ECA Framework for the Semantic Web.