The Cross References view (XRef)
The Cross References view (also known as "XRef") is an extensible Eclipse tool that can be used to show information relating to Java elements shown in the editor or outline view. It is used in AJDT to show AspectJ crosscutting information, such as when a Java method is affected by advice.
The latest version of the XRef tool is available in standalone from the update site below, and is the version included with the latest development builds of AJDT 1.6 for Eclipse 3.4. Note that this standalone version is only for use with other providers - none are included with the tool so it is not functional on its own.