What is the connection between Oracle and Lotos notes?

This is a very generic question. Notes is an IBM product under their collaboration offering, whereas Oracle is a hardware and software company.

IBM® Enterprise Integrator for Domino® (formerly IBM Lotus Enterprise Integrator® for Domino) supportsdata synchronization between IBM Domino and third-party data sources. This software provides data transfer and data synchronization capabilities, and enables business applications to access and use external data sources, such as IBM DB2®, Oracle and SAP. Using data synchronization, it helps to extend the reach of business applications and create more efficient workflows by working with data from diverse platforms and databases.

IBM Enterprise Integrator for Domino features:

• Access to a wide variety of external data sources and operating platforms for high-volume data transfer and data synchronization and near-instant data access from IBM Domino.
• Comprehensive data handling capabilities for flexible application integration that can improve your business processes.
• Easier administration to help create and maintain processes for consistent, accurate data synchronization integration.