The CMS electronic logbook

The CMS ELogbook (ELog) is a collaborative tool, which provides a platform to share and store information about various events or problems occurring in the Compact Muon Solenoid(CMS) experiment at CERN during operation. The ELog is based on a Model-View-Controller(MVC) software architecturalpattern and uses an Oracledatabase to store messages and attachments. The ELog is developed as a pluggable web component in OraclePortal in order to provide better management, monitoring and security.