org.olat.core.util.bulk: Package which provides the abstract class BulkAction. Extend it when you have to handle a list of users with the same action. To understand how it's implemented have a look at the BulkAssessmentWizardController

org.olat.core.util.cache: Package which provides some implementation of caches used by the DB abstraction layer, the group management and the base security package. See the section on caches for details.

org.olat.core.util.component: Package which provides visitors and traversers

org.olat.core.util.controller: Provides everywhere useful controllers

org.olat.core.util.event: Package which provides a simple event handling system, described in more detail in the section on events.

org.olat.core.util.i18n: This package handles all i18n within OLAT. See the section on i18n for details.

org.olat.core.util.locks: Package which provides a manager to handle locks. A workflow may set/remove locks to prevent multiple users from accessing some functionality within OLAT. Locks are persisted accross sessions.

org.olat.core.util.mail: Contains Emailer, a class providing basic email functionality.

org.olat.core.util.memento: Provides the interface for the memento pattern

org.olat.core.util.nodes: Provides classes to represent a simple node structure and a helper class NodeHelper to manipulate such structures.

org.olat.core.util.prefs: Package whcih provides structures persistence classes for handling various persistent preferences.

org.olat.core.util.radeox: Package extending the Radeox wiki markup.

org.olat.core.util.rss: Helper classes for handling RSS data.

org.olat.core.util.traversal: Package providing helpder classes for traversing structures.

org.olat.util.tree: Package providing helpder classess to work on tree structures.

org.olat.util.vfs: Implementation of the virtual filesystem. See section on virtual filesystem for details.

org.olat.core.util.xml: Provides helper functionality to easy handle xml stuff