See:
Description

EMF Compare

org.eclipse.emf.compare	This package contains EMF Compare's core plug-in classes.
org.eclipse.emf.compare.util	This package contains utility classes used throughout EMF Compare.

Other Packages

org.eclipse.emf.compare.diff	This packages backs up EMF Compare's differencing functionality.
org.eclipse.emf.compare.diff.api	This packages provides the interface that can be implemented by clients to define their own diff engine.
org.eclipse.emf.compare.diff.engine	Provides a generic diff engine.
org.eclipse.emf.compare.diff.merge	Provides merge services for models.
org.eclipse.emf.compare.diff.merge.api	Provides the API for all of the merging features.
org.eclipse.emf.compare.diff.merge.service	Provides merging service for EMF Compare.
org.eclipse.emf.compare.diff.metamodel
org.eclipse.emf.compare.diff.metamodel.impl
org.eclipse.emf.compare.diff.metamodel.util
org.eclipse.emf.compare.diff.provider
org.eclipse.emf.compare.diff.service	Provides differencing service for models.
org.eclipse.emf.compare.match	This packages backs up EMF Compare's matching functionality.
org.eclipse.emf.compare.match.api	Provides the API that can be used for clients in order to implement their own matching engine.
org.eclipse.emf.compare.match.engine	Provides a generic match engine.
org.eclipse.emf.compare.match.metamodel
org.eclipse.emf.compare.match.metamodel.impl
org.eclipse.emf.compare.match.metamodel.provider
org.eclipse.emf.compare.match.metamodel.util
org.eclipse.emf.compare.match.service	Provides matching service for models.
org.eclipse.emf.compare.match.statistic	This package provides the logic behind EMF Compare's matching process.
org.eclipse.emf.compare.match.statistic.similarity	Provides classes to compute String similarities and EObjects structural similarity.
org.eclipse.emf.compare.ui	This package provides the GUI components used to display EMF Compare's comparison results.
org.eclipse.emf.compare.ui.editor	This package provides the editor that can be used on a comparison result exported as an emfdiff file to open EMF Compare's GUI without running the whole comparison process anew.
org.eclipse.emf.compare.ui.export	Provides the API that can be used in order to add new export actions to EMF Compare's GUI.
org.eclipse.emf.compare.ui.preferences	Provides the classes used by compare to add its own preferences page to eclipse.
org.eclipse.emf.compare.ui.util	Provides utility classes used by EMF Compare's GUI.
org.eclipse.emf.compare.ui.viewer	This package provides the graphical components used to extend org.eclipse.compare viewers to provide model specific UI.
org.eclipse.emf.compare.ui.viewer.content	Provides EMF Compare's specific implementation of a ContentMergeViewer.
org.eclipse.emf.compare.ui.viewer.content.part	Provides the graphical components of the ModelContentMergeViewer.
org.eclipse.emf.compare.ui.viewer.content.part.diff	Provides the tab folder displaying the model tree and the associated differences markers.
org.eclipse.emf.compare.ui.viewer.content.part.property	Provides the tab folder displaying the model elements' properties and their associated differences markers.
org.eclipse.emf.compare.ui.viewer.structure	Provides the TreeViewer displaying the structural view of the model differences.
org.eclipse.emf.compare.ui.wizard	Provides the wizard allowing for the serialization of a comparison result as an emfdiff file.