Key bindings

The association between a command and the key combinations that should invoke the command is called a key binding.  Plug-ins can define key bindings along with commands in the org.eclipse.ui.bindings extension point.

      <key commandId=""

There is our friend In Eclipse, the workbench registers the SaveAction as a handler for this command id in every Workbench Window.

The sequence attribute for a key binding defines the key combination that is used to invoke a command.  When the workbench SaveAction is active, the key combination CTRL+S will invoke it, since the workbench uses the same command id for its SaveAction.